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.

Great kit got it running with GPS and a RTC kit from QRP-Labs.
ran a 40m Test tonight on 500mW

I try to be active for an hour every day to correlate the radio coverage with the solar activity.

Go here :
to read some more on my WSPR receiver but also for some observation on the effect of the local noise level for WSPR reception.


It was getting time to upgrade from the fine radio ic706mkiig, I was getting good signal reports and all but after researching new radios I settled on the ic7300. already having much better reports from who can hear me...look to enjoy.

Transmitting = 66 foot end fed from 25 ft above ground to a deck 8ft above ground back to the building and back to the deck in a zig-zag pattern to avoid overlapping turns and parallel wires.

Receiving = a 3ft diameter amplified loop with a send/receive switch box.

Rig = Yaesu FT-450D

Note: If I use the end-fed for receiving, my noise is S9. On the amplified receive only antenna the noise is S7.

I was first licensed in the 1970's but went qrt for about 25 years when I started my family but now my son has got married I've got my shack back :)

I've always been interested in qrp and aerials so WSPR is brilliant for me and I can leave the radio to do its thing whilst I do other stuff really enjoying the return back to amateur radio and wreaking havoc with my 5 watts :D

Hi all.
I just released my WSPR Receiver for sale on my Webshop.
It is a complete one-band receiver built in box trimmed and ready to use.
Use this instead of tying up your regular Ham tranceiver for receiving WSPR.
Just plug in between Antenna and computer, can even be powered from a free USB port.

It takes about 0.4Watt of DC power, has a 10ppm crystal, about -127dBm (0.1uV) sensitivity measured for a 3dB S/N ratio in 500Hz bandwith.
It is frequency calibrated against my Rubidium standard before delivery.

Since adding this homebrew elliptical MW bandstop filter to eliminate nearby AM Broadcast overload, I am now able to upload 630m WSPR spots received on my Flex-1500. The filter does not affect its regular HF operation on 80m and above. The antenna is a 40m Loop SkyWire fed with 300 ohm Ladder Line.

I'm wondering why my location is showing me in the pacific ocean.

The past two months or so DJ0HO/MM has been making spots from the area around the Antarctic Peninsula and the South Shetland Islands. It surprises me that almost no information can be found on DJ0HO, that no information about the DJ0HO/MM operations came out in the WSPR community, and that as far as I know nobody did any inquiries as to the background of the Maritime Mobile station. I did some research and I have good reasons to believe DJ0HO/MM is located onboard of the German research vessel RV Polarstern.

Due to the limited frequency range to 4 meters in Germany (70,150 - 70,180), WSPR broadcasts will take place until the end of August 2018 at 70,151 MHz. 73! Klaus DK6AO/DK0LOW

I built a temporary spiral loop, for 40m. I am working out the bugs with finding the correct tuning capacitor for this design. building from design by N4SPP. Have two unknown value air variable capacitors, neither would tune 40m by themselves(too high pf value) currently in series and now in range.

Thought I would share my result on WSPR mode today. Not hearing anything and did get one spot though on my 30 meter signal.

Today I did a WSPR monitoring session on 20m. I noticed that a lot of European stations were hearing HZ1SK. I did not. Then I noticed that there was a strong signal in WSPR 2.0 on the same particular frequency that just everytime did not result in a decode. The frequency was close to the one in use by HZ1SK. Then I started WSJT-X to see if maybe this program would produce a decode. It did, and it indeed was HZ1SK, which now in WSJT-X was decoded every time. I ran both WSPR 2.0 and WSJT-X simultaneously and again WSPR 2.0 failed to decode. Why?

It seems odd to me that I would only be hearing from one rather small geographic region on 40 meters WSPR. You can see on the screen shot of the WSPRnet map that I have only picked up stns from SF area of CA (several stns repeatedly over about 1.5 hours so far). I am running a mag loop antenna from indoors... in the kitchen which has a due south facing wall.