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. The software is open source, and the data collected are available to the public through this site.

I started on 10 meters today @ 1318Z running 1 watt. I am working at the house today, so I will leave it up and running for the rest of the day. I am still seeing what I suspect is Doppler shifts from air traffic at the DFW Airport.

Hi, I have been using my WSPR-AXE standalone transmitter, now with a continuous transmitting 40% duty cycle 1 PPS timing daughter card. The interesting thing is that it is using a 15 inch ferrite loopstick antenna located on the second floor of my townhouse; in a closet. 1W directly into the antenna. The spots below are typical of the reporting:

2011-11-01 12:12 KA1GMN 1.838173 -17 0 EM12ku 10 K9PAW EN61ar 1276 37
2011-11-01 12:04 KA1GMN 1.838173 -17 0 EM12ku 10 K9PAW EN61ar 1276 37
2011-11-01 12:00 KA1GMN 1.838173 -15 0 EM12ku 10 K9PAW EN61ar 1276 37
2011-11-01 12:00 KA1GMN 1.838171 -22 0 EM12ku 10 KU4PY EM62wj 1031 90
2011-11-01 12:00 KA1GMN 1.838171 -8 0 EM12ku 10 K9AN EN50wc 1138 42
2011-11-01 11:56 KA1GMN 1.838173 -11 0 EM12ku 10 K9PAW EN61ar 1276 37
2011-11-01 11:52 KA1GMN 1.838173 -11 0 EM12ku 10 K9PAW EN61ar 1276 37
2011-11-01 11:48 KA1GMN 1.838173 -11 0 EM12ku 10 K9PAW EN61ar 1276 37
2011-11-01 11:44 KA1GMN 1.838172 -14 0 EM12ku 10 K9PAW EN61ar 1276 37
2011-11-01 11:40 KA1GMN 1.838171 +13 0 EM12ku 10 KE7A EM12kx 14 0
2011-11-01 11:40 KA1GMN 1.838171 -10 0 EM12ku 10 K9AN EN50wc 1138 42
2011-11-01 11:40 KA1GMN 1.838172 -14 0 EM12ku 10 K9PAW EN61ar 1276 37
2011-11-01 11:36 KA1GMN 1.838172 -13 0 EM12ku 10 K9PAW EN61ar 1276 37
2011-11-01 11:32 KA1GMN 1.838172 -14 0 EM12ku 10 K9PAW EN61ar 1276 37
2011-11-01 11:28 KA1GMN 1.838173 -12 0 EM12ku 10 K9PAW EN61ar 1276 37
2011-11-01 11:24 KA1GMN 1.838171 -14 0 EM12ku 10 N4AU EM62vp 1021 88
2011-11-01 11:24 KA1GMN 1.838172 -17 0 EM12ku 10 K9PAW EN61ar 1276 37
2011-11-01 11:20 KA1GMN 1.838171 -12 0 EM12ku 10 K9AN EN50wc 1138 42
2011-11-01 11:20 KA1GMN 1.838170 -20 0 EM12ku 10 KU4PY EM62wj 1031 90
2011-11-01 11:20 KA1GMN 1.838171 -15 0 EM12ku 10 N4AU EM62vp 1021 88
2011-11-01 11:20 KA1GMN 1.838173 -13 0 EM12ku 10 K9PAW EN61ar 1276 37

In April 2010 a friend of mine took one of my beacons to 5X7 in his luggage on a business trip. In Masaka he handed it over to Jack, 5X7JD. He run the beacon from April '10 until August when heavy storms broke the power line to his building and the antenna.
Shortly after that Jack had to leave Uganda and the beacon remained there powered off.
Two months ago he had a chance to return for a short visit and took the beacon with him to Florida. From there it arrived by mail last week.

AE2EA has a very strong signal in to Euless, Texas:

1512 7 -0.2 28.126162 0 AE2EA FN12 37

I live 5 miles from the DFW Airport. I noted N6GN's observations about the effects of Doppler on 10 meters.

With running just 1 watts on the xmitter output:

2011-10-29 23:40 KA1GMN 28.126183 -23 0 EM12ku 1 ZL1EE RF72is 11994 237
2011-10-29 23:36 KA1GMN 28.126183 -26 0 EM12ku 1 ZL1EE RF72is 11994 237
2011-10-29 23:32 KA1GMN 28.126183 -23 0 EM12ku 1 ZL1EE RF72is 11994 237
2011-10-29 23:28 KA1GMN 28.126183 -29 0 EM12ku 1 ZL1EE RF72is 11994 237

ZL1EE only heard me. I could not hear him and that is due to local QRN.

With 10 meters being the way it is, I thought I would set up the stations to operate WSPR on 10 meters with just 1 watt of power. The antenna is a 27 foot rotatable doublet support by crappies poles at 30 feet. I have been using this antenna on 10, 12, and 15 meters with good luck via JT65A.

I set up the WSPR application and tweaked the transmitter output to 1 watt. I am being heard in ZL-land. Impressive!

I am a little bit surprised with propagation on 10m.... I had idea to work at CQWWDX SSB especially and only on 10m but I am afraid it will be impossible. The propagation today is worse then conditions one week before...

I've recently written a small Java web app that produces animated gifs of one's activity on WSPR. It uses the raw data supplied on this site and accepts various options. Is this this something that would be useful for others? I'm willing to donate the code to this site, and I'd like to hear from you regarding additional features.

See this forum topic for more info and sample files/screenshots.

73 de k4det

Today I modified the code to produce random frequency offsets of +/- 64 Hz for each slot.

I read the ADC with the input PGA gain at x200 which has no input and use that as my noise source.

I re-calculate the tone values just before transmission.

I am also leaving the DDS powered up (just DAC shutdown between transmissions) to reduce the temperature variation on the near located $1 oscillator.

glen VK1XX

Thank you for the input and information.

I have made a website for the project

https://sites.google.com/site/vk1xxwspr/home

the files are posted here for viewing and downloading

The timing problem was----The PC version uses deep audio buffers and there is extra delay beyond the described implementation.

In the next 2 weeks, I will CAD the schematic and maybe a PCB

73 glen english VK1XX

Spent a couple of hours in the shack this afternoon and build up a WSPR transmitter - just TWO chips to RF.

- using only a microcontroller to generate the data for a DDS- IE I produce WSPR direct on frequency from the DDS, passing through an output filter and chip amplifier 100mW.

No transceiver, no PC. Just two chips. Generates WSPR from DC to 150 MHz anywhere.

Not sure if the timing is correct- My PC says 2 seconds early but I think it is correct.

Happy listening.

Please provide me some timing reports if possible.

Just trying this mode for the 1st time today everyone - please forgive me if I mess things up!

Did a short write-up here about my test.
http://ve3cnu.blogspot.com/2011/10/my-first-try-at-wspr.html

Every so often in life there are moments that you get to treasure.
Sometimes it takes a little time for the significance of that moment to sink in and be recognized or fully understood.

I like many Amateurs operate a very modest WSPR station in the suburbs of a large city, with a wire dipole @ 7.5mts strung between the house and a tree in the backyard. The receiver is an SDR-IQ and a Dell computer running Windows XP.

Today I see a station that I have spotted a number of times in the last week about the same time each afternoon.

Hi all.

I was just thinking that it would be really handy to know, if someone is running a directional antenna with WSPR, what direction they are pointing.

It would be very handy, especially for people using 10m, 6m, 2m to know which way people have their antenna facing.

I was thinking that, for example, when u see a stations call on the WSPR map, that u click on their call and now it brings up data such as this "VK6DZ Tx 20% 50.294520 37dbm", that it would be handy if something basic could be included like -

VK6DZ Tx 20% 50.294520 37dbm NW

or

K6PZB and I have been running WSPR on 6M, 2M and 432.3 MHz lately. To do this we both operate with external OCXO master oscillators on our IC-706 WSPR radios.
Our stations are about 5 miles apart but K6PZB is located on the wrong side of a hill on the western end of this E-W path. This makes it particularly interesting
for examining Doppler from aircraft flying in our region.

Learned about this from Ernie/W4HLN looking forward to it!

I left my station on 80 meters last night before I went to bed :-)

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