I've built a new Ultimate 2 kit from Hans G0UPL. Trying out first WSPR mode transmissions on 14097115. 150 mW into a G0FAH dipole up 40'. Hope to be spotted.
The source code for firmware 1.12 is available for download.
The new feature in this release is the ability to run the beacon in "cycling mode" where it goes through the bands (frequencies) you selected.
Several sets of bands are programmable and can be selected at startup time.
Two radios transmitting simultaneously, one exciting a 'reference' antenna and another a test antenna using two different freqs to differentiate the results at the spotting stations.
Ref Ant - A dipole center at about 30', dipole is horizontal
Test Ant - An EH Antenna, center line about 25 feet, EH antenna oriented vertically.
(1) The EH Antenna is fed via a coupling loop (Link coupled) near the EH "Tuning coil" and is not directly connected as normally depicted on most websites.
(2) The low frequency radio was on the EH antenna, the higher freq radio was on the dipole antenna
Update 6-11-2013: More plots of SNR of the Dipole vs the EH Antenna at various stations:
(1) Plot of 40m WSPR snr at K9AN ........ (2) Plot of 40m WSPR snr at W4DJW
(3) Plot of 40m WSPR snr at WB2EEE .. (4) Plot of 40m WSPR snr at F1VMV
(5) Plot of 40m WSPR snr at K7TSW ..... (6) Plot of 40m WSPR snr at VE6PDQ
This is the really wild one; notice how the EH still holds the path whereas the dipole has died away:
(7) Plot of 40m WSPR snr at AK4UR 1691 km at 64 deg.
. . Timestamp .......Call.........MHz.......SNR Dft Grid . Pwr Reportr RGrid . km . .az
2013-05-31 02:18 WB5WPA 7.040058 -22 0 EM13qc 5 VE6PDQ DO33fl 2632 334
I am running a GPS-disciplined Softrocks RXTX from Singapore on 20 meters at 14.0975. Details of the GPS reference modification are here:
I recently instaled a 4m. yagi oriente to Nord-East. I am able to receive WSPR on 70 Mhz from central SPAIN.
I set Receive dial on 70,091.00 Mhz./ USB, like other UK stations. That is not the WSPR frequency of the WSPR Software. pls. do you have any recomendation for RX frequency? Thanks.
Juan Carlos / EA4ETR
Am I the only WSPRnetter who has major problems with Google Maps? It's been occurring for months, and makes the map view of WSPRnet useless at times (right now for example). 73
I did my 1st TX with WSPR last night and got a spot from Florida, so quite pleased with that.
For a limited period (till 31.12.2013) its now allowed to use all Modes (also Digimodes) in DL, hopefully i see some activity also on
Here the article on the DARC-Website (sorry,only in german language)
tonight some experiments with smal magnetic loop inside the shack
27 dB leaving it on for the night
is a lang time ago lets see what is happening pictures on mij website
receptions is alright for now
I've been thinking about it for quite some time now, and I would like to present the case in general:
Would it be possible to get wspr version 2.21 the function, which could choose to display the transmit power band basis. When you use the band jumps, looks like the same power for each band. It would be useful if each band to set different power information is displayed in the text transmission. The tool integration could occur for example in the same "box" where the band is determined by jumps. What is the a "jury" thinks about this? :-)
73 de Heikki
While WSPR is running you can use part of unused CPU for BOINC projects.
BOINC lets you contribute computing power on your home PC to projects doing research in many scientific areas. Visit this web http://boinc.berkeley.edu/projects.php.
I am contributing with investigations projects as well my PC is decoding WSPR signals.
73, Juan Carlos EA4ETR
I started using WSPR a month+ ago, using Guido's fantastic WsprryPi software, but unfortunately sustained a Fried Pi when I transmitted into a nearby antenna, resulting in excessive RF voltage into the Raspberry Pi GPIO pin. Sadder but wiser, I now have a buffered and galvanically isolated interface that seems to be working well, still operating with an estimated 10 milliwatts of power (I'll do an actual measurement when I get home from Dayton). At present, the Pi is on 20 meters using a non-resonant longwire antenna. Due to lack of time, I don't even have a tuner on it! This just proves how effective WSPR is, even under non-optimal conditions. Over 50 spots in just an hour or so, it will be fun to check the database and see how well this jury-rigged setup gets out over the Dayton weekend.
73, Bob W9RAN
Hi All, just wanted to share some details on my setup - it's based on Guido's PE1NNZ and Dan's nice WsprryPi project:
I am using a Raspberry Pi Model A with a 40m band pass filter from http://kitsandparts.com/bpf2.php
connected to a vertical end-fed 31' wire via a 4:1 unun. It's running 24x7 on 40m with 4 minute pauses after every 2 minute transmission.
I haven't tuned the wire antenna for minimum SWR yet so the actual radiated power is currently lesser than 10mW but still enough to get some spots as far as 1,200km away. Once it's tuned, the range is expected to increase.
I'm planning to add a relay board soon interfaced back to RPi in order to switch the band-pass filters. This will allow 40/20/15/10m using just one RPi.
73! Paul VA3PAW
Welcome to new member Bill KK4INP/ARC NR4DL, operating from USCGC Ingham (museum ship) Key West, FL.
i wrote a little tool to show your wspr spots from Downloads
into DX Atlas included the sun position
73 de Schalli, DC5BN
I thought that perhaps those who see me logging their signals might like to know more about the setup at my QTH.
Right now I maintain two receivers in continuous operation. My personal interest is in NDB Dxing so the MF band comes closest. On MF I have a selective level meter (Anritsu ML422C) driving two WSPR programs. One is listening in standard WSPR mode and the other in WSPR-X. The WSPR spots are logged as K0SWL53 and the WSPR-X spots as K0SWL53L. So far, no spots on WSPR-X and only two unique on WSPR.
My second receiver is a Softrock Ensemble II RX that I usually keep on 20 meters but sometimes I move to other bands for a few nights. This runs on a separate laptop.
All of the receivers in my shack are using the same antenna which is a 21 foot ground mounted vertical. Because I use it on longwave most of the time, a 100 to 1 impedance transformer sits in the antenna base and connects to the shack with a balanced (twin-lead) transmission line. In the shack, the signal first goes through a homebrew band reject filter for the BCB and then a homebrew 18 db Norton feedback amplifier before being distributed to the receivers. The gain is necessary because the antenna output is very low. Also, my distribution system contributes noise and extra gain is needed to overcome that as well.
I am thinking about putting up a k9AY loop this summer. I have some ideas for improving it on longwave.
My home is located in the northern surburbs of Denver. Unfortunately, this puts me in the middle of lots of BCB stations. The MF WSPR band at my QTH suffers from about 6-8db of excess noise due to IBOC splatter from a BC station at the low end of the AM dial. My SNR reports tend to be lower than most on MF because of this.
I’ll transmit 2m WSPR beaming to south on Saturday. Frequency is 144.490530MHz. Equipment here is FT-736M (Typ5W Max25W, GPS PLL) and 8element beam. Scheduling is possible. Please give me an e-mail. (Call email@example.com)
Written in Spanish but it is clear in the photos.
73 de Armando
Just seen interesting behaviour of the latest wspr-x. After been 24 or more hours online in RX only
mode, a new station comes up, that has misformed probably call in TX mode, so immediately my wspr
instance is no longer visible in the activity/map on the wsprnet.org site and the received spots are
also not submitted. Please check attachments. Hope this helps
How to fix:
Replace /usr/lib/python2.7/dist-packages/PIL/ImageDraw.py by the file at
Note: do the following after copying the files
- cd /usr/lib/python2.7/dist-packages/PIL/
- chmod 0644 ImageDraw.py
- rm ImageDraw.pyc
about how to fix the bug.
73 de Kenji JJ1BDX (es JO3FUO)