Tag Archive for wspr

Crossing the Atlantic with 2 milliwatts on 10m

wspr_qrpp

As I was letting my new WSPR transmitter stabilize yesterday afternoon I noticed a few stateside stations were decoding me even though the transmitter’s final amp circuitry was not yet on. Power output in this state is a bit under 2 milliwatts according to my recently calibrated QRP wattmeter. With that in mind, and considering…

Stellar WSPR receiver kit built and working

rk-1

Last week I ordered a Stellar WSPR RK-1 Receiver Kit for the 30 meter band. I received the kit today and built it after dinner in a little over an hour. There are about 40 through-hole parts to install on a board with plenty of real estate. Anyone who’s built a QRP kit will find…

Ultimate III kit completed and tested

U3_1

I managed to find time to build Hans G0UPL’s latest kit yesterday morning and am happy with the results of today’s initial testing. Assembly time of the main kit plus one low pass filter (for 30m) took a bit over 2-1/2 hours. The parts assembly aspect of the kit consists of two small boards – the main…

A stand-alone receiver kit for WSPR

wspr_rx

A few months ago I wrote about a new transmitter kit for WSPR. A receiver kit for this mode is now available from a different source (also available fully built). Of more significance than the fact that we hams have a new kit available is the idea that WSPR is a great science project for…