A single band (20m, 40m or 80m) SSB transceiver kit from Australia. Also using a HF-AUTO Antenna Tuner for the beam's and a BT1500A Balanced Antenna Tuner for my 450 ohm ladder feed horizontal loop (160-10m) For antennas I'm using a horizontal loop for 160-10m at about 15-20m height - using 450 Ohm ladder line to the tuner. WSPR is pronounced "Whisper" and is short for "Weak Signal Propagation Reporter Network". My post on WSPR with the Raspberry PI has been very popular lately. A coax jumper lead with BNC on each end. I patiently waited for the 20m band to open one Sunday morning and eventually worked a couple of stations in PSK31 up and down the west coast all easily on 25watts. Good purchase. 10mhz and 20. 489 and 432. Ft817 Ft8 Setup. It is connected to the antenna, but still the antenna is only a couple of feet away from the RPi3. Using WSPR to Evaluate Antennas. On 30m the antenna also has a good low angle radiation pattern. This antenna covers. Member Discount! TR-Plus Transmit/Receive Switch for Pure Signal. Using an antenna analyser a low SWR was seen at 7. 0, after configuring the virtual cables correctly the CAT control has allowed me to both receive and transmit with the Flex. That is a an Active Antenna amplifier from active-antenna. This is remarkable, since the 5/8 has the lowest angle of radiation and has about 1dB more gain (compared to 1/4 and 1. Note the frequency and the unusual large DT! Then some time later that same day I received what probably was the matching second part of the SA2LLL/63 compound WSPR message (Fig. So next months I will be testing the new vertical with the CG-3000 remote auto tuner on alls bands from 160m to 12m. The portable antenna, linked dipole for 20m and 40m setup in the garden. How I did that and the results achieved are in this video. 2:1 on the meter of a RadioShack SWR/Power meter connected between the QCX and the antenna. WSPR Frequencies are listed in the footer of each page on this web site. Base End-Fed antenna for 20m, 10 meter in length. "Good fortune. WSPR testing. At a rough estimate the signal radiated by the L-Whip is about 13dB down on a dipole on 30m and 20m. WSPR You Say? Posted on January 17, 2018 by Steven Joerger The other day I was Googling for antenna comparisons (HF vertical vs OCFD) and came across a Youtube video by K5ACL where he uses WSPR to compare his two antennas. The implementation presented here can support 5 bands of which I concentrate on 2 bands - 20m and 40m. WSPR (Whisper) stands for Weak Signal Propagation Reporter. Describe your experience with the QRP Labs Ultimate3 QRSS/WSPR kit and tell us why you give it the rating you did (required). The WSPR-Pi (also known as "QRPi") is Zoltan, HA7DCD's transmitter for 20M. 20m wspr w/ mfj 1899t I realize using WSPR is kinda "cheating" because you could probably go outside, holler your call sign, and with the capabilities of the software someone in Madagascar would see you on their waterfall…. WSPR : Weak Signal Propagation Reporter Network. I recently got an Arduino Uno. I made an Arduino and AD9850 VFO which was a good learning experience but I didn't have any immediate need for a VFO. I was on 20m WSPR for about 24h at 17-Sept. /wspr N9NNN EM10 33 20m The same as above, but without NTP calibration: sudo. org database spot query function such as: - Band * dropdown fields = LF, MF, 160m, 80m, 60m, 40m, 30m, 20m, 17m, 15m, 12m, 10m, 6m, 4m, 2m, 70cm, 23cm - Count * input field integer values from 1 to 1000 - Call * input field alphanumeric - Reporter * input field. 2 -r WB6CXC CN88LM 10 20m 0 0 0 • screen -r • Nyquist - sampling theory • Shannon - channel capacity 23 WSPR, Raspberry. These boards really work well even in a sun…. JT65, JT6M etc. All of the WSPR transmitters are fundamentally the same. VK1AD WSPRLite beacon past 24 hours to 0945 UTC 26 March 2017 Radio amateur stations in Europe, North America, New Zealand and Australia who report receiving my 20m 100 mW WSPRLite signal. Also using a HF-AUTO Antenna Tuner for the beam’s and a BT1500A Balanced Antenna Tuner for my 450 ohm ladder feed horizontal loop (160-10m) For antennas I’m using a horizontal loop for 160-10m at about 15-20m height – using 450 Ohm ladder line to the tuner. Between 1pm and 7pm the antenna scored 114 contacts on receive which was enough to make the WSPR challenge board at #41. 2 PA7MDJ receiving SA2LLL/63 on 20m WSPR. The unit contains filters for 30 m and 20 m operation. The above plot is for the SNR's measured on K1JT WSPR-beacon on 2 antennas , a K9AY oriented NW and a mag-loop oriented NE. QST March 1978, pp. Antennas: • Diamond 50N (2m/70cm) • Scan King Discone 2000 (25MHz - 2GHz) • FlightAware 1090MHz ADSB antenna • Wellbrook Active Loop Antenna NEW ALA1530LN • HLP-2 Halo Loop (folded dipole antenna for 144MHz, APRS) • 8m long-wire (magnetic balun, for WSPR RX) Other projects:. Buy EAntenna Hex Beam HEX6B 10-12-15-17-20m 5KW R2010905 Beam/Yagi Antennas online at £514. Always trying to get that extra out of them. Configure it, connect a power source and an antenna, and you are WSPR-ing at up to 200 mW on 20m and 30m out of the box, and 40m, 80m, and 160m with an additional lowpass filter kit. This antenna IS better than any other portable “mounted directly to the radio” antenna that I have ever used. In a Previous Post, I wrote about adding an 80m Band Pass Filter and switching it out for the 40m filter, essentially adding a second band to the BITX40. The antenna is a pair of wires on the high z port of the RSP2pro run around the baseboard inside. Conclusion is that there is no compelling performance deference between the Antennas. 300), and since it's used with SSB on HF, I was wondering if it had to be used with SSB on VHF/UHF. I have it on my inverted V dipole in the backyard inside a ziplock bag to protect it from the elements. One in each slot. The implementation presented here can support 5 bands of which I concentrate on 2 bands - 20m and 40m. Have also an Endfedz 20M+40M antenna. The receiver is also an Arduino Uno with another VFO shield and the SDR shield on top. I'm looking to compare two antennas using WSPR. Member Discount! TADD-1 RF Distribution Amplifier. Order 7-Band 100 Watt QRP (low power) OCF Dipole Antenna: $312 Special Price: $235 (6 or more = $188 ea. Then I tried a coax with the shield in one slot and the center wire in the other. Today (a week later!). If desired, a separate 5V power supply (for those who do not wish to use the USB port) can be used (not included). 00 Add to cart. 11 of WSPR includes FMT, a package of command-line utilities. My antenna is a 40m OCF wire dipole with the feed point at 8 metres above ground level. G4ILO's Distant Whispers page - an excellent introduction to WSPR. 15mm copper wire supported on 4 pound breaking strain "Dyneema" fishing line going up to the balloon, and 5. It uses surface mount components and comes fully assembled and ready to go. Once configured using a special Windows or Andriod app (third party LINUX and Mac support available at WSPRlite Facebook Group ), WSPRlite only needs a USB power supply to operate (no need to tie up your computer). I switched from a wire antenna to the Wellbrook for receiving mainly because all I had room for was a 20M wire antenna so lower frequencies (especially < 500KHz) suffered. Model Mid for bands 40m, 30m, 20m and 17m (7MHz, 10MHz, 14MHz and 18MHz) Model High for bands 15m, 12m, 10m and 6m (21MHz, 24MHz, 28MHz and 50MHz) WSPR-TX Mini Transmitter (Needs components, read. It is an excellent receiving antenna and one that actually does pretty well on transmit as well. 6 kHz with the call sign LU7AA. 2:1 on the meter of a RadioShack SWR/Power meter connected between the QCX and the antenna. The FT8 protocol is implemented in several application programs including the. I am in a restricted housing area so my inverted V wire antenna are located inside the attic of my home. NES Member. It is resonant on 20m without the added 40m coil, but requires a tuner for the other bands. 2kHz USB dial Julian. The antenna from the fishing pole (telescopic). Thank you for answer, my idea was to do that with a short-cut to view immediately the SNR difference between antennas like using WSPR or FT8 mode. I could have set it up in the surrounding trees but I figured that it would be a perfect field. The unit contains. A Disguised Flagpole Antenna. When doing WSPR reception comparisons, on all bands from LF through to HF 20m (I never checked the higher bands) the mini whip of PI4THT always outperforms my HyEndFed 10/20/40 sloper wire antenna. Ik maakte een klein sprongetje bij deze afstand van. The antennas were pointing the wrong way for Melbourne and short-distance propagation was unfavourable so I didn't hear them very strongly (or at all) on 7 and 14 MHz. 10mhz and 20. WSPR 20m tonight 5 watts WSPR on 20 meter tonight. It was first released in April 2008. Probably my HyEndFed (and the Alexloop) are still better antennas but the lack of any ground surely has some impact in it’s performances. Or in more practical terms. Using WSPR to Evaluate Antennas. In the garden, next to the house I’ve set it up in a inverted V configuration with good results. 00 Add to cart. Lots of radio amateurs build their own verticals. The RTL-SDR operated in a software direct sampling mode to make it work on the 20m band. Ultimate3 v3. I have ordered a 20m WSPR shield from TAPR that has the necessary LP and BP filtering needed to make it work cleanly. I have tried a couple of different antennas. A conventional Beacon Network consists of a set of beacon stations around the world which transmit on known frequencies, times and power levels. I have $400 right now for a WSPRlite SB, SOTAbeams band hopper antenna, and a SOTAbeams travel mast. It was odd that I was unable to hear any CW on 20m's but using WSPR at one watt I was heard overseas. 2868 MHz, by 43 dB. • Check the LNB. Afgelopen week viel het mij al op dat mijn signaal in de avonduren gehoord werd door het station DP0GVN op Antartica. Comparing 20m dipole and magnetic loop Did an interesting test today to compare the performance of my 20m multiband dipole and my MFJ magnetic loop. A Facebook page devoted to amateur radio operators who utilize the WSPR mode and anyone. The antenna setup is the same as my portable kit, the linked 20 and 40m dipole. The project turned out a great portable antenna for 20m and the performance will definitely surprise you. The antenna is a 20m dipole made from 5. The only real difference between any of them is the low pass filter (LPF). " Another WSPR experiment, this time with the LimeSDR USB, is detailed on the Myriad-RF forum, while Miloshev's experiments can be found here. The original design is from Harry Lythall, SM0VPO (ref. 8 metres long. WSPR signals. Is it just propagation , low noise or antenna?. To post to this group, send email to [email protected] So I am planning for a new shack this summer. The antennas work together as a single telescope nearly 5,000 miles across, giving the VLBA its ability to see fine details. 1MHz so an ATU can easily match the ~200ohms non-reactive feed point impedance. This consists of 2 ground rods 20m apart in the ground connected to the PA by a wire running, at most 1. Personally I like the VK7JJ wspr site and the PE1ITR WSPR rx challenge site. Station Master CB antenna on 20m I have had this antenna sitting under the work bench in the garage for some time. QCX 20m as a WSPR beacon Jonathan Bresler Antenna has been measured in the last couple days with a RigExpert AA-54 to have reasonable SWR. To do this he uses the WsprryPi software which allows you to transmit WSPR by connecting an antenna directly to a GPIO pin on the Pi Zero. WSPR 20m band activity data recorded from 29/10/2017 to 31/10/2017 showing SNR against UTC time, Vertical axis = dB below the noise floor. FT8, WSPR and the Shortwave Listener (This post is an article I wrote for "The World of Shortwave Listening" column of The Spectrum Monitor magazine - August 2018 issue. The antennas were pointing the wrong way for Melbourne and short-distance propagation was unfavourable so I didn't hear them very strongly (or at all) on 7 and 14 MHz. I used WSPR to test out the antenna. Simone Mannini IW5EDI. Bandspringer Midi , end fed antenna, 10m-60m. I have been wondering about the efficiency of my HF antennas recently and I fired up WSPR on my pc one day. PA3GNZ's blog about: Hamradio, Lighthouses, 6cm ATV, WSPR was running with WSPR on 40M. I have recently linked my Flex 5000A with WSPR 2. Paul WA9PUL-- Paul Goelz Rochester Hills, MI USA [email protected] www. Refer to he link give above for more details. WSPR Map - 26 April…. Heel goede aankoop gedaan , geen spijt van. Onboard GPS module and antenna calculates position and altitude. 2 PA7MDJ receiving SA2LLL/63 on 20m WSPR. Paul Stam, PC4T , is a regular contributor to AmateurRadio. Seeing 3W and SWR of 1. Some books say that you don’t use the counterpoise at all on 10m. :50 - 20m - 2 mins WSPR then two x 1 min JT9 - if batt full Update #1 8 Sep 2015 After being tossed around for a few hours by a rough weather front that caused rapid altitude changes of the payload in the Southern Ocean, PS-52 went down on Monday night, 4000km from the nearest tracking station ZL1RS in NZ. This is a deluxe set of kits containing all the kits you need to build a smartly boxed, GPS-disciplined, 6-band QRSS/WSPR modes transmitter using the Ultimate3S. Construction was easy and using my antenna analyser got the traps resonant on 14. 3V active antennas. A shortened multi-band End-Fed Half Wave (EFHW) antenna for 80-10m Steve Nichols G0KYA A shortened multiband antenna, about 23m long, for 80m-10m that offers low SWR (1. All spots are considered (not just matching spots). Working quite well. The WSPR-Pi (also known as "QRPi") is Zoltan, HA7DCD's transmitter for 20M. First I used my trusty doublet on 20M with 10W of output: Next, the vertical: I think its plain to see which one is working better for me! I am very impressed with the antenna and will be going /P down the beach with it tomorrow so lets see how well it performs. WSPRlite is a self-contained propagation beacon transmitter. My other test was to run WSPR at low power on 20m. 84 grams and takes around 55mA at 3. 49 MHz in IARU Regions 2 & 3. Contacts were made on 40 & 20m. I've managed to get the WSPR software running on the shack computer using Windows remote desctop which allow me to see whole screen on the laptop. I have decided to implement a 20m WSPR station with it. This project aims to build a complete miniature 20m handheld tranceiver into an Ozon mint tin. Tonight: 20 meter WSPR before all signals fade out. Free Newsletter. Labeling on the circuiboard indicates which terminal is for the ground braid and which for the center lead. These boards really work well even in a sun…. Operation on other bands requires a simple low-pass filter. WSPR - 20m Success Wow! After 24 hours continuous operation I'm amazed how well the prototype transmitter my son put together for me worked. Using this xtal and some fine-tuning activity you end up in the. Here is a link to the setup manual and here is a link to Zoltan's presentation at the 2015 DCC. QRP and compromised antennas 20M WSPR: We all know antennas like the HF360 are a compromise I just wanted to put it to the test especially QRP! Update: 2043hrs UTC: So I've moved onto 40M WSPR still running the same setup and 1watt and the best spot is VK!. Furthermore, our answer is not based on using costly commercial receivers or antenna arrays but on the simple 40m WSPR direct conversion receiver described in April 2016's PW with straightforward. This was all done in the early afternoon so the band was wide open. I am in a restricted housing area so my inverted V wire antenna are located inside the attic of my home. All of the WSPR transmitters are fundamentally the same. 0956) and adjusted to audio input to give 5W total output. Nothing on the Ground Screw. WSPR - 20m Success Wow! After 24 hours continuous operation I'm amazed how well the prototype transmitter my son put together for me worked. In a Previous Post, I wrote about adding an 80m Band Pass Filter and switching it out for the 40m filter, essentially adding a second band to the BITX40. Map Circle size corresponds to SNR, and color to antenna. WSPR is pronounced "Whisper" and is short for "Weak Signal Propagation Reporter Network". Therefore the tin should contain the battery pack, morse key, headphones and even antenna wire!. Ham Radio articles with a focus on WSPR. So the building at my house continues and my shack is still in pieces. Using this system on 8. The multiband for 40, 20 and 10 meter (11,5 meter long) It does outper Hy End Fed Antenna. The antenna looks ideal for portable or balcony use, being small and easy to erect. 097 centre Power 200mW Antenna 21m Off-centre-fed dipole @ 12m AGL Location 12km S. When the WSPR beacon transmits the RF interference can cause a reboot. Is powered from USB. Submitted by K4LCT. /wspr --free-running N9NNN EM10 33 20m Transmit a WSPR transmission slightly off-center on 30m every 10 minutes for a total of 7 transmissions, and using a fixed PPM correction value. 20M WSPR 1watt and HF-360 vertical As it's Easter weekend "Happy Easter to all" shortly the family will be over for a BBQ and prepping for that so I'm just QRV on WSPR. Read honest and unbiased product reviews from our users. Antenna 1 is a monoband antenna for NVIS; antenna 2 is a wire antenna 34m long with a coupler at its base, set up for 40m. The centre insulator of the simple indoor dipole made for 6m WSPR With my U3S on the HF bands frequency drift never had been a real issue (mostly 0 on the lower bands, and mostly 0 to 1 or an occasional 2 Hz on the 20m band), but now on 6m the drift was considerable, mostly 4 Hz, probably making. I have tried a couple of different antennas. 15mm copper wire supported on 4 pound breaking strain "Dyneema" fishing line going up to the balloon, and 5. I was not very active after then but I worked something and mostly running in WSPR , JT65 and PSK as SWL. 0, after configuring the virtual cables correctly the CAT control has allowed me to both receive and transmit with the Flex. Lying on the bench, is about 0. The radiation efficiency of the Hi-Q 5/160 antenna is as follows and is based on a 102" whip mounted directly above the loading coil. As for an antenna, I was just using my 20m doublet strapped and fed against ground via a homemade ATU. There is a lot of WSPR-2 activity on 474. 3V active antennas. Microwave beacons are also used as signal sources to test and calibrate antennas and. Sadly Julian is now a SK. Besides my little uBitX running off a small lithium battery pack, what really drew interest was the loop antenna that could be disassembled and carried with the rig in a small cloth briefcase. Ik maakte een klein sprongetje bij deze afstand van. Then I tried a coax with the shield in one slot and the center wire in the other. In this particular case on the 20m (~14MHz) amateur band in the WSPR mode. I've also done demo indoors with 2. i have left it transmitting on 10m, 15m, 20m ,30m ,40m and 80m…. Sign Up Here For Your. One of my 2008 antenna projects was a square spiral loop antenna for the 80 meter band. It is able to report location, altitude, temperature and pressure to the internet ( APRS-IS ) or direct to an amateur radio once a minute with a solar panel/super capacitors or just 4xAAA batteries. I then connected the Loop antenna to the 50Ω assembly. Please realign dish if necessary. I dont wont to get the stuff if it wont work. G4ILO's Distant Whispers page - an excellent introduction to WSPR. 5-5W WSPR on a 817, even smaller telescoping 20m (MFJ-1820T 4. Let me know (MW1CFN) if you want to run a side-by. QRP is amateur radio slang for 'low transmit power'. In a Previous Post, I wrote about adding an 80m Band Pass Filter and switching it out for the 40m filter, essentially adding a second band to the BITX40. It is vertically mounted off a rafter in the loft and my other antennas are horizontal to cut down on cross talk/re-radiation effects. It is similar like the PAR. “It is fun and you can use a simple long-wire antenna hung by the balcony. The FT8 protocol is implemented in several application programs including the. It just lists the frequencies (144. Two-band portable dipole antenna system (Band Hopper II) £59. The TX and solar cells weigh 14 grams, and the whole payload with antenna weighs about 16 grams. I set the output to 1 watt and gave 40, 30 and 20m's a go. WSPR 20m band activity data recorded from 29/10/2017 to 31/10/2017 showing distance in km against UTC time. SSTV Pics - 15m Repeater. It was pointed out that all you need to turn your Pi into a WSPR transmitter is a board from TAPR called QRPi. Safe to say, I think: the antenna WORKS! I also had the good fortune to suffer a power outage during my attempted 40m QSO this morning. Testing a 30m perimeter rectangular loop antenna. 160, 80, 75, 60, or 40 Meter Full Wave Horizontal Loop Antenna or, Why I use an Electric Fence Antenna on 160 Meters. 24 KB: I'm looking to compare two antennas using WSPR. Hardware Setup: Install (Mount) Shield on Raspberry Pi (Instructions) (Transmitting Only) Attach Antenna My Random Wire Antenna: 16. It is not resonant, but that does not affect any antennas ability to radiate - it just means an ATU is required. After some juggling with the wire lengths the antenna gave me 1:5. 3 weights 2. 75 inch copper cylinders and a 10-turn tuning coil. SSTV Pics - 20m. 0956) and adjusted to audio input to give 5W total output. This antenna would then look very similar to my compact 60-10m vertical (inverted-L or -V) consisting of a 9. 5:1 SWR all day. When doing WSPR reception comparisons, on all bands from LF through to HF 20m (I never checked the higher bands) the mini whip of PI4THT always outperforms my HyEndFed 10/20/40 sloper wire antenna. Member Discount! $19. Further details on this excellent publication are available at www. Works on any band from 2200m to 2m with an option to operate on up to 6 bands. The loop is a rectangle which is easier to support on short masts. QST May 1993, p. But they were good signals on 160m. That works great, but after I added the 80m band to my BITX40, I realized that I also wanted the ability to add other bands. 2 -r WB6CXC CN88LM 10 20m 0 0 0 • screen -r • Nyquist - sampling theory • Shannon - channel capacity 23 WSPR, Raspberry. Unlike other designs, this one includes a passband filter that significantly smooths the resulting waveforms (such filter would be legally mandatory in the United States). WSPR tests shows this antenna performs really well. Contact him at [email protected]. I've managed to get the WSPR software running on the shack computer using Windows remote desctop which allow me to see whole screen on the laptop. LinPSK/ DarwinPSK is a Psk31 and RTTY program for Linux/ Intel and Macintosh /OSX. Release EU1KY AA Firmware CEC Version 0. Besides my little uBitX running off a small lithium battery pack, what really drew interest was the loop antenna that could be disassembled and carried with the rig in a small cloth briefcase. Last night while operating WSPR @ 475KHz I suddenly hear a hard and broadband noise on one of my receivers. Matching reports. WSPRlite operates on 160-80-40-30-20m. Its located just 10m to the West of 1) - It's bonded to ground via multiple rods and into the lake bottom. It can produce QRSS, Hell, WSPR, Opera and PI4 slow-signal modes anywhere from 2200m to 2m and even 222MHz bands. I have posted some videos on YouTube and will continue to do so when I do something interesting with the neat little antenna. Personally I like the VK7JJ wspr site and the PE1ITR WSPR rx challenge site. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected] 5' antenna) and wire counterpoise and get heard coast to coast in the US from central portion. Tax) Add to Cart. 5-5W WSPR on a 817, even smaller telescoping 20m (MFJ-1820T 4. WSPR is pronounced “Whisper” and is short for “Weak Signal Propagation Reporter Network“. The centre insulator of the simple indoor dipole made for 6m WSPR With my U3S on the HF bands frequency drift never had been a real issue (mostly 0 on the lower bands, and mostly 0 to 1 or an occasional 2 Hz on the 20m band), but now on 6m the drift was considerable, mostly 4 Hz, probably making. 00am local until 17. Several kits are now available that include the WSPR generator with pre-programmed user callsign and QTH locator together with a QRP transmitter. QST March 1978, pp. I have $400 right now for a WSPRlite SB, SOTAbeams band hopper antenna, and a SOTAbeams travel mast. WSPR Build 3617 installed with no issues on Windows 10 and I was up and running in a few minutes with my FT-897D. 20m half-size Yagi-beam- The 80 mtr spiral loop antenna erected on my terrace The first plot below shows a 24-hour WSPR spots map with the antenna placed indoors, in a house with an all-metal roof (!): The next plot below shows a 2-hour WSPR spots map with the antenna placed outdoors. QRP Multi-band HF EFHW antenna for SOTA Post updated 29 September 2017. Had some e-mail exchange with R0AU about WSPR details. Hints and Tips to Get Started on SSTV. Here is a link to the setup manual and here is a link to Zoltan's presentation at the 2015 DCC. Because my leftovers were implemented in the G5RVjr, I had to order some parts. Ultimate3 v3. The WSPR protocol is highly efficient when it comes to reaching distant places. In a Previous Post, I wrote about adding an 80m Band Pass Filter and switching it out for the 40m filter, essentially adding a second band to the BITX40. SSTV VK6AAL DX News. My antenna is a 40m OCF wire dipole at 8 metres. Seeing 3W and SWR of 1. Find helpful customer reviews and review ratings for Super Antenna MP1DXR HF Portable SuperWhip All Band MP1 Antenna with Clamp Mount and Go Bag ham Radio Amateur at Amazon. I used it quite successfully for 80m QRP DX using WSPR, but for local contacts it didn't do any better than my ZS6BKW which just seems a fantastic antenna (except on 15m). 10m radiator, 4 radials of 4. 2868 MHz, by 43 dB. 75 inch copper cylinders and a 10-turn tuning coil. The centre insulator of the simple indoor dipole made for 6m WSPR With my U3S on the HF bands frequency drift never had been a real issue (mostly 0 on the lower bands, and mostly 0 to 1 or an occasional 2 Hz on the 20m band), but now on 6m the drift was considerable, mostly 4 Hz, probably making. The antenna has a full 300kHz bandwidth on 80m between 3:1 SWR points. Fleet ll is a 45 ft. Useful Links. The results are show above (East was predominantly 80m, West 20m) On RX, comparing the loop and 40m resonant dipole, a 2 S point (~6dB) difference was observed in favour of the dipole. The Flagpole Deluxe. Member Discount!. 40m WSPR Antenna Test Data RevA Temp. WSPR (Whisper) stands for Weak Signal Propagation Reporter. VK1AD WSPRLite beacon past 24 hours to 0945 UTC 26 March 2017 Radio amateur stations in Europe, North America, New Zealand and Australia who report receiving my 20m 100 mW WSPRLite signal. The French REF CW contest was held on Saturday the 28th and Sunday the 29th of January 2017 on the HF bands from 10m to 80m. No Spam -- EVER! Special Pricing and Closeouts, New Products, Ham Radio News and Views, Technical Tips, and More. 300), and since it's used with SSB on HF, I was wondering if it had to be used with SSB on VHF/UHF. 3% 80m 12% 60m 28%** 40m 43% 30m 60%** 20m 77% ** The Hi-Q site does not quote RE figures for 60/30m so I have taken an average. is that this antenna on 15M will work. Antenna accessories and hardware Scroll down for our huge range of handy products for making your own high-performance antennas for home or field use. This consists of 2 ground rods 20m apart in the ground connected to the PA by a wire running, at most 1. com and writes from the Netherlands. WSPRnet - the WSPRnet home page; K1JT's WSPR webpage - K1JT wrote the software for WSPR. I've also done demo indoors with 2. I have inserted two additional links for coverage on 17m and 30m. When propagation will improve I will use more QRPp for WSPR. The antennas were pointing the wrong way for Melbourne and short-distance propagation was unfavourable so I didn't hear them very strongly (or at all) on 7 and 14 MHz. I have decided to implement a 20m WSPR station with it. 0, after configuring the virtual cables correctly the CAT control has allowed me to both receive and transmit with the Flex. 00 Add to cart. The radiation efficiency of the Hi-Q 5/160 antenna is as follows and is based on a 102" whip mounted directly above the loading coil. This morning I finally located the necessary pigtail that would allow me to connect the SMA connectors to the UHF connector on my antenna and got it hooked up. You need : 1. Subject: {2 Meter WSPR} ARISS Voice Uplink Frequency Conflicts with 2 meter WSPR Some of our 2 meter WSPR study group members have raised concerns about possible interference between 2 meter WSPR operations on our established 144. Stacked Element. There is a lot of WSPR-2 activity on 474. The WSPR measurement immediately followed the 2 minute-averaged grab. At the moment the beacon is running in testing mode from my shack in Bucharest, with a 42m long OCFD antenna, on the following bands: 6m, 10m, 15m, 20m, 30m, 40m. Radio amateur stations in Europe, North America, New Zealand and Australia who report receiving my 20m 100 mW WSPRLite signal. But the G7FEK is not your average HF Antenna. Head to head on 20M (where my wire dipole was resonant) they were pretty similar. Extension To make it a multi band (10/20/40/80m) antenna when little space is available:. I was able to get reports in the -25 db range out to the other coast with a 1 watt TX signal. Unlike other designs, this one includes a passband filter that significantly smooths the resulting waveforms (such filter would be legally mandatory in the United States). #N#The BitX20A and BitX17A are complete SSB kits with board, all parts, digital display and custom powder coated and punched case that is based on the BitX20 that was designed by Ashlan Farhan. Lying on the bench, is about 0. On January 25th I let my transmitter broadcast WSPR both night and day on the 40 meter band with 5W output. After several WSPR cycles I noticed I was averaging only about 5 or 6 spots on each cycle. 5 watt my signal was received by KE7A in EM12KX at a distance of 4670 miles and best DX on receive was ZL3DMH in RE66IM at. * 200 Hz CW filter * Rotary encoder. When disassembled the antenna easily fits in a suitcase or backpack. Keeping your antenna away from obstructions (particularly metal) Using the best quality antenna feeder and connectors that you can Keeping all external cable / feeder / antenna joints free from moisture Probably most contentiously matching the antenna to the transmitter (or use a mono-band antenna) Reducing noise pick up (use a balanced antenna). QRP Labs Kits. An amateur radio propagation beacon is a radio beacon, whose purpose is the investigation of the propagation of radio signals. 2kHz USB dial Julian. Matching reports. A station can then listen to the beacon frequency and determine if the associated band is open to the places in the world where the beacons are. They are nothing of the sort. Released in 2017, FT8 has shown itself to now be the most. SHORTWAVE WIRE ANTENNAS G5RV to ZS6BKW modification useable for 40, 20, 17, 12, 10 and 6m my goal for this work: In 2007 I installed an G5RV antenna to make my first steps on shortwave. 5:1 SWR all day. I have recently linked my Flex 5000A with WSPR 2. This has been great fun and I recommend that anyone with a Raspberry Pi and an Amateur Radio license give it a try. Subject: {2 Meter WSPR} ARISS Voice Uplink Frequency Conflicts with 2 meter WSPR Some of our 2 meter WSPR study group members have raised concerns about possible interference between 2 meter WSPR operations on our established 144. Probably my HyEndFed (and the Alexloop) are still better antennas but the lack of any ground surely has some impact in it’s performances. A 40m WSPR weekend 40m from 7am-7pm local time With the Solar cycle heading on a downward trend I have been reading how 40, 80 and 160m may be the bands of choice for QSO's. Program WSPR allow tune duration time TX and RX, in our case we tuned program only to transmit every 2 minute. DJ2LS WSPR Spot Heat Map. WSPR: THE WEAK SIGNAL PROPAGATION REPORTER—Part 2 BUILD A WSPR KIT OR TWO (C ONTINUATION) Note: I’ve simplified the radio theory, mathematics and block diagrams. Refer to he link give above for more details. The loop is a rectangle which is easier to support on short masts. The antenna looks ideal for portable or balcony use, being small and easy to erect. Further details on this excellent publication are available at www. NES Member. 0Mhz for a 40/20m dipole. When I select this antenna and wait 30 seconds for a couple of WSJT-X FT-8 updates the list of call signs instantly becomes mostly Northeast US call signs with few or no DX stations. A Facebook page devoted to amateur radio operators who utilize the WSPR mode and anyone. WSPR 20m band activity data recorded from 29/10/2017 to 31/10/2017 showing SNR against UTC time, Vertical axis = dB below the noise floor. WSPR is a great way to test an antenna. Nothing fancy. I made one last year and had a blast on holiday and scheduled my WSPR installation to switch between 40m and 17m. You can use this tool to better understand propagation and relative antenna performance. Both are in the attic of my very small detached house, the dipole is in the apex at a height of about 8m above ground. The unit contains. It’s presently only 7-8 meters (24’) above ground level at N6GN. NES Member. FT8/FT4/JT9: WSJT 2-Way Narrow Modes For Amateur Radio has 10,036 members. This consists of 2 ground rods 20m apart in the ground connected to the PA by a wire running, at most 1. This year I took the linear amplifier to the park at the end of the street. Measured and recorded the values every 50kHz from 14,000 to 14,350. The WSPR-Pi (also known as "QRPi") is Zoltan, HA7DCD's transmitter for 20M. Member Discount! $19. I use the same Inverted-L's for WSPR as I do for other modes. I have thrown together a 20m wire version of the antenna, accepting it may have significant losses, and run it on WSPR against others known to be running high-quality experimental small loops. This is the magnetic loop assembled to stage where it can be put on the air. QRPi (20M WSPR-Pi) Raspberry Pi QRP TX Shield for WSPR by TARP ★ ★ ★ ★ ★ Low Pass Filter kit 20 Meter LPF kit by QRP-Labs ★ ★ ★ ★ ☆ Portable HF Magnetic Loop Antenna Model HF-315 by Caras Manufacturing ★ ★ ★ ★ ★ uBITX HF QRP Transceiver Low cost, low power kit by HF Signals ★ ★ ★ ★ ☆ uBITX Case by W5BEK. On Thursday, January 30 at 1400 GMT AMSAT Argentina will deploy a WSPR / APRS drifting Buoy on South Atlantic Seas. Lying on the bench, is about 0. Hustler 6BTV 6-Band HF Vertical Antenna and DXE Installation Guide Packages are trapped-vertical antennas that provide an omni-directional pattern. Making it a resonant antenna for all bands from 80m to 6m (except WARC bands). WSPR Map - 26 April…. Dual Antenna Stacking Boom For A430S10 and A430S15. Therefore it is RECOMMENDED to add some form of isolation, e. The kids are on there own now and don't live here anymore I have more rooms for the hobby. Unexpected band seen 775 times. (That simply involved pushing the ANT button on the front of the K3, so it was not too hard!). A coax jumper lead with BNC on each end. Over the time frame from 1900z to 0100z on 20m I recorded about 30 instances where G6NHU appeared on WSPR and had a clean grab on the Pensacola Snapper near the same time. Pick from here or from the drop down menu at the top of the page to visit the individual product pages for specifications, prices, and a link to the assembly manual for your review. Make a WSPR beacon from a QRP-Labs Ultimate3S kit Using WSJTX to test your antenna system with your main rig and a PC is relatively easy, we've documented how to do this here: WSPRX. All QRP Labs kits may be ordered online securely at the shop, with PayPal payment. I was looking for a small WSPR beacon for portable use. I made a few contacts then put it on WSPR as I wanted to compare to the vertical EFHW. Switching from QT2 to QT3 I did a major redesign especially of modulator/demodulator classes to implement new modulation types more easily in the future. I really wanted to be spotted by this station, but my 200 mW WSPR sgnals just everytime failed to excite some electrons in the station's antenna. I used WSPR to test out the antenna. See my little film on YouTube. It will be 3 hamsticks 20m 40m and 80m all connected to a pice of angle steel and fed in to a 9:1 balun all input would be gratefully received. There is nothing to do but put it up. Timestamp Call MHz SNR Drift Grid Pwr Reporter RGrid km 2017-02-21 16:30 VK1AD 14. • Check the signal strength in the “Channel Search” menu. KJ7AWJ here. 44kg (my multi-band EFHW antenna weighs 1. 5 watt my signal was received by KE7A in EM12KX at a distance of 4670 miles and best DX on receive was ZL3DMH in RE66IM at. Probably my HyEndFed (and the Alexloop) are still better antennas but the lack of any ground surely has some impact in it’s performances. 930 MHz but will change frequency to 145. Personally I like the VK7JJ wspr site and the PE1ITR WSPR rx challenge site. WSPRlite is a self-contained propagation beacon transmitter. 138 MHz crystal was bought at the German "FUNK" magazine. It has rotary encoder synthesised tuning, VFO A/B. LightAPRS-W is an affordable, smallest, lightest, powerful and open source APRS tracker with WSPR. -----Here is a 24 hour animation of our contacts:-----. I have ordered a 20m WSPR shield from TAPR that has the necessary LP and BP filtering needed to make it work cleanly. Even so, by working to improve efficiency and to eliminate common mode current on the feedline, I have come up with a very good performer. Browse 24 job listings from companies in Nam Dinh that are hiring now. Unlike other designs, this one includes a passband filter that significantly smooths the resulting waveforms (such filter would be legally mandatory in the United States). The Small Wonder Labs PSK-20 was a very popular kit which is now no longer available 🙁 The kit was originally designed to work between 14. an all band vertical, 10-15-20m beam, etc. Antenna has been measured in the last couple days with a RigExpert AA-54 to have reasonable SWR. Anyway, I thought I would leave it running on 20m WSPR for 24 hours to see what it could pick up. Looking forward to doing more WSPR and FT8 work when I get around to buying some more advanced equipment. This my longest distance with WSPR until now. Other useful information would include your experience with similar products, infomation on a product that you would purchase instead of this one, and so on. Is it just propagation , low noise or antenna?. For example the 20m Inverted V will work on 20, 15, and 10m because those frequencies all 'fit' on the antenna at even multiples. Hardware Setup: Install (Mount) Shield on Raspberry Pi (Instructions) (Transmitting Only) Attach Antenna My Random Wire Antenna: 16. Ft817 Ft8 Setup. well, I've been running wspr this pm on 20m and 17m and in both cases if I switch to dummy load and set the noise level to 0 and then switch in my ZS6BKW doublet, the level still remains at zero. Customer supplies antenna. 489 and 432. Submitted by K4LCT on Sat, 2017/06/10 - 15:41. These modes were all designed for making reliable, confirmed QSOs under extreme weak-signal conditions. The radiation efficiency of the Hi-Q 5/160 antenna is as follows and is based on a 102" whip mounted directly above the loading coil. It also can “prove” that sometimes propagation exists, even when it shouldn’t 🙂 I use it occasionally , but not too often. The earth-electrode antenna consists of two earth rods, or one earth rod and a connection to a copper water pipe separated by 15-20m of cable running along the ground. My particular antenna is best suited to 20m and 40m. Reception came alive with these new dimensions on 20m and on WSPR mode, I see I've just heard VY0ERC, the most northerly amateur radio station in the world and on transmit, I also seem to be doing a fine job. Worldwide 20m Propagation Reported By WSPRnet. I was not very active after then but I worked something and mostly running in WSPR , JT65 and PSK as SWL. Just to check and see how propagation is these days. FT8/FT4/JT9: WSJT 2-Way Narrow Modes For Amateur Radio has 10,036 members. LinPSK/ DarwinPSK is a Psk31 and RTTY program for Linux/ Intel and Macintosh /OSX. Evening all, I had my first play with WSPR last night having previously been into JT65 and FT8. In the meantime the antenna has been used on WSPR on 30m with 1 watt and my signal has been received by N0RW in EL87PR a distance of 4364 miles and best DX on receive was YV4GJN in FK50XF at 7522 Km. It's an intriguing little transmitter that does nothing but WSPR. Testing an FT-991 5w with EndFed Monoband Wire antenna 20m @ 15t. Of course, someone had published a similar project on the Internet. 00 Add to cart. Its located just 10m to the West of 1) - It's bonded to ground via multiple rods and into the lake bottom. 2014 Es is gettig ander way. On 40m I had more luck than on 20m. Sotabeams WSPR-Lite Classic Band / frequency 20m / 14. Further details on this excellent publication are available at www. The kit includes a commercial quality plated through, silkscreened, solder masked board, and all board mounted parts. To avoid self-resonance, the conductor length for a small transmitting loop antenna should be less than 1/4 wavelength (less than about 5. WSPR Map - 26 April 2017. Heel goede aankoop gedaan , geen spijt van. Furthermore it isn’t nearly so efficient as a full-size 20m dipole. 1/2)^2/50 = 300 mWatt which is slightly more, but the software says it is 23 dBm. Reaching Across Europe with a Raspberry Pi Zero and WsprryPi Over on YouTube user Techminds has uploaded a video that shows how he is using a Raspberry Pi Zero to transmit WSPR. 5m over ground or, if the mast is fixed to a metallic structure, kept away some meters and fixed. I would like to work data modes. 80 for the LF options and $33 for the HF/VHF versions). 5' antenna) and wire counterpoise and get heard coast to coast in the US from central portion. When reading the blog of Roger, G3XBM, I ran into the WISPY TX beacon. Hustler 6BTV 6-Band HF Vertical Antenna and DXE Installation Guide Packages are trapped-vertical antennas that provide an omni-directional pattern. 0 by Moe Wheatley, AE4JY. As for an antenna, I was just using my 20m doublet strapped and fed against ground via a homemade ATU. 00am local until 17. 0695MHz & 14. As I previously described, one of the antenna designs I’ve been using on 20m is quite small, only 75cm (30”) tip-tip. Just to check and see how propagation is these days. It's easy to build a 40m, 30m, 20m & 17m all-band antenna (or even more elements). My post on WSPR with the Raspberry PI has been very popular lately. The APRS beacon, callsign LU7AA-11, will initially be on Argentina's APRS frequency of 144. The two shown below bracket the WSPR frequency. Find Great Ham Radio Products. Is powered from USB. Conclusion is that there is no compelling performance deference between the Antennas. A 40m WSPR weekend 40m from 7am-7pm local time With the Solar cycle heading on a downward trend I have been reading how 40, 80 and 160m may be the bands of choice for QSO's. (That simply involved pushing the ANT button on the front of the K3, so it was not too hard!). 0956) and adjusted to audio input to give 5W total output. :50 – 20m – 2 mins WSPR then two x 1 min JT9 – if batt full Update #1 8 Sep 2015 After being tossed around for a few hours by a rough weather front that caused rapid altitude changes of the payload in the Southern Ocean, PS-52 went down on Monday night, 4000km from the nearest tracking station ZL1RS in NZ. Would this be possible as a home base antenna please look at the photo. 5 watt my signal was received by KE7A in EM12KX at a distance of 4670 miles and best DX on receive was ZL3DMH in RE66IM at. Had some e-mail exchange with R0AU about WSPR details. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. Open a second terminal window and run the ncat command again, making sure to change the tuned frequency. 00 Add to cart. So far I had really not been active on 80 meters, due to antenna limitations and its perceived suitability for DX (I am not interested in local rag chewing ). WSPR and antenna pattern Published on May 7, 2016 May 7, 2016 by pa1ejo The frequency bandplan for 20m reserves 14070 to 14099 kHz for the digital modes such as WSPR , it is a fairly busy part of the spectrum as the waterfall plot on the TU Twente receiver shows. These antennas perform well in restricted space areas. K1FM Pico Balloon Introduction: This tracker board is WSPR based and transmits on 20 meters. Some quick features: Low power 20mW autonomous shortwave WSPR transmitter for the 20m and 30m Amateur bands that continuously transmits its position and altitude during daylight. My antenna is just a HamStick vertical for 20M on my balcony. Buckmaster 7-Band OCF Dipole Antennas are 135 feet (41 meters) long and work on 80, 40, 20, 17, 12, 10, and 6 meters. A Raspberry Pi as a WSPR beacon Thanks to the Southgate Amateur Radio news, I've just seen that Guido, PE1NNZ has turned a Raspberry Pi into a 10mW WSPR transmitter that works up to 250MHz. With small antennas there is always a compromise! Versions have been made for most HF bands. QST May 1993, p. 2 Metres 20M 30M 40M 40M Homebrew AHARS Antenna APRS Baofeng Conservation. After several WSPR cycles I noticed I was averaging only about 5 or 6 spots on each cycle. WSPR stands for Weak Signal Propagation Reporter, but it's pronounced "Whisper" - quite an appropriate name as it is all about sending and receiving signals that are barely audible. Second attempt: RPi 2 TAPR QRPi Shield 20m wire dipole Weatherproof box 10000 mAh USB battery WSPR: WsprryPi + TAPR QRPi TX Shield 19. I was able to get reports in the -25 db range out to the other coast with a 1 watt TX signal. well, I've been running wspr this pm on 20m and 17m and in both cases if I switch to dummy load and set the noise level to 0 and then switch in my ZS6BKW doublet, the level still remains at zero. These WSPR tests gave me the opportunity to compare the signal radiated by the Wonder Wand L-Whip with that radiated by my main antennas located in the attic a couple of metres above my shack. I'm looking to compare two antennas using WSPR. This is the magnetic loop assembled to stage where it can be put on the air. Member Discount! TADD-2 Pulse-Per-Second Divider. So stay tuned for my next blog entry. 2 Metres 20M 30M 40M 40M Homebrew AHARS Antenna APRS Baofeng Conservation Cooltong Dipole EFHW Eyal Gal FT817 FT817ND Hand Held health and well being HF kit Linked Dipole Linux Lyrup Microwave 10Ghz 6031-1Microwaves microwaves Minikits National Park Parks Portable Portable. I also got a few reports from USA’s East Coast, somewhere above the Arctic Circle, Middle East and alot of spots from Europe, so I’d say 200mW is doing a fine job for a WSPR beacon. So it would be nice to develop a Raspberry Pi shield which is able to transmit on more than one band. The VLBA is a system of radio antennas located across the United States from Hawaii to St. Really enjoying WSPR. It is a full wavelength on 10 MHz and 3/4 wavelength on 7 MHz. My post on WSPR with the Raspberry PI has been very popular lately. Currently the board supports 20m, but other bands are planned. The antenna is a pair of wires on the high z port of the RSP2pro run around the baseboard inside. FT8 Frequencies on HF VHF UHF Ham Radio Bands. There are a number of sites you can check afterwards. So far I had really not been active on 80 meters, due to antenna limitations and its perceived suitability for DX (I am not interested in local rag chewing ). 1/2)^2/50 = 300 mWatt which is slightly more, but the software says it is 23 dBm. I still have the problem of loosing WIFI. The unit contains. ” Another WSPR experiment, this time with the LimeSDR USB, is detailed on the Myriad-RF forum, while Miloshev’s experiments can be found here. It is connected to the antenna, but still the antenna is only a couple of feet away from the RPi3. QST March 1978, pp. Measured and recorded the values every 50kHz from 14,000 to 14,350. Power output is estimated at about 1. WSPR Station Hardware What else do I need? 5V 1A micro-USB power supply USB keyboard and mouse or Logitech K400 wireless keyboard+trackpad 4GB or larger micro-SD card HDMI monitor 20M antenna Optional: case for RPi+WSPR TX Most of this is already available in a well-equipped ham shack!. WSPR 20m band activity data recorded from 29/10/2017 to 31/10/2017 showing SNR against UTC time, Vertical axis = dB below the noise floor. WSPR Frequencies are listed in the footer of each page on this web site. 10mhz, other bands would also be fine with the use of an antenna tuner. A brief WSPR transmitter comparison WSPR is a fantastic mode to use for investigating propagation paths. Over the years, I’ve used three different methods of transmitting WSPR, I’m going to describe all of them, starting with the aforementioned WSPRlite. I’ve covered the L-Match tuner and long wire antenna in the past, and while it’s a great way to get on the air, it is a compromise antenna. I ordered by PA3EKE the Hy End Fed Antenna for 20 meter. Glenn-- You received this message because you are subscribed to the Google Groups "2 Meter WSPR" group. It is connected to the antenna, but still the antenna is only a couple of feet away from the RPi3. Running this since a year on the roof with great success! Can be run in RPi 1-2-3. When doing WSPR reception comparisons, on all bands from LF through to HF 20m (I never checked the higher bands) the mini whip of PI4THT always outperforms my HyEndFed 10/20/40 sloper wire antenna. Par Electronics calls these antennas 'dipoles'. The Weak Signal Propagation Reporter Network is a group of amateur radio operators using K1JT's MEPT_JT digital mode to probe radio frequency propagation conditions using very low power (QRP/QRPp) transmissions. Make a WSPR beacon from a QRP-Labs Ultimate3S kit Using WSJTX to test your antenna system with your main rig and a PC is relatively easy, we've documented how to do this here: WSPRX. 20M @20dbm into HF-360 vertical and 30M @23dbm into DX-EE dipole. The antenna it replaced covered 10m, 15m and 20m. A little wood, some wire and a handful of components can make a directional antenna for indoor use where outdoor antennas are not permitted. For highest efficiency, the conductor length for a small transmitting loop antenna should be greater than 1/8 wavelength (greater than about 2. WSPR Frequencies are listed in the footer of each page on this web site. The antennas work together as a single telescope nearly 5,000 miles across, giving the VLBA its ability to see fine details. Amateur Radio Homebrew Experiments Charlie Morris, ZL2CTM http://www. But it does have an advantage; it is small enough to be easily rotated in both azimuth and polarization, It’s a great tool for investigating local noise!. Reception came alive with these new dimensions on 20m and on WSPR mode, I see I've just heard VY0ERC, the most northerly amateur radio station in the world and on transmit, I also seem to be doing a fine job. Deluxe set contents: The Ultimate3S QRSS/WSPR Transmitter Kit transmits various QRSS, Hell, Opera, PI4 and WSPR slow-signal modes on any LF, MF, HF or VHF band (all amateur bands from. ran this antenna early in the tests and it decoded slightly less than 1). WSPR Antenna Comparison Data (PDF) Conclusions. The antenna is a pair of wires on the high z port of the RSP2pro run around the baseboard inside. I am really only interested in 40 meters, the antenna does not need to be multibands. For the last few weeks, I've been contemplating putting the 160m skywave loop back up here. com/profile/02642502413959463906 [email protected] I have it on my inverted V dipole in the backyard inside a ziplock bag to protect it from the elements. Your PayPal receipt is your confirmation that we have received your order. Got me thinking about my antenna, it's orientation, and lots of. org will be fascinating. It has a 10-turn choke 1 metre down from the antenna. No Spam -- EVER! Special Pricing and Closeouts, New Products, Ham Radio News and Views, Technical Tips, and More. I’ve had quite a few antenna setups in the past years. I really wanted to be spotted by this station, but my 200 mW WSPR sgnals just everytime failed to excite some electrons in the station's antenna. The resonant point is quite sharp, so after constructing the antenna, it must be trimmed to the required frequency within 20m. I was on 20m WSPR for about 24h at 17-Sept. This antenna IS better than any other portable “mounted directly to the radio” antenna that I have ever used. Using WSPR to Evaluate Antennas. A few stations from Canada who spotted me. Measured and recorded the values every 50kHz from 14,000 to 14,350. The 4 foot boom with a 16 foot turning radius will fit perfectly in a townhouse 17 foot lot. I still have the problem of loosing WIFI.