Tag: wspr

Solar Powered WSPR Transmitter

A while ago I completed the QRP labs WSPR transmitter, you can read about that project in this article. I wondered how easy it would be to set this up in the garden, solar and battery powered. The QRP labs unit transmits around 200mW, and the idea was to have this running 24×7 transmitting around […]

MF WSPR Reception

Following on from the previous post, WSPR reception continues mostly 24×7 with a focus on MF. As previously described the setup has been operating for a couple of weeks now, and its a good time to review the WSPR spots. Best DX Spotted 472 KHz Call Grid Pwr km az  WA4SZE  EM65 0.2 6826 45 […]

WSPR Reception 24×7

WSPR reception 24×7 has always been something I have wanted to try. The problem is trying to find a transceiver, computer, antenna combination that will allow this with minimum fuss. 472 KHz Reception   Computer You won’t need a very high spec computer, but if you are leaving it on 24×7 low noise and power […]

QRP labs Ultimate 3S Part 2

Welcome to Part 2, the project started in Part 1 and this covered the initial build and setup of the Ultimate 3S. Changes to the TXM are possible but require you to manually change the LPF and input a new frequency via the software. QRP labs have developed a relay switched LPF kit, and Part 2 covers the […]

How far does 1mW go ?

Do you remember playing as a kid with the short range 49 MHz walkie-talkies ? We used to play with these often as a kid, and the range was shorter than your voice ! With an output between 5 and 50 mW these could often struggle to communicate more than a few meters. Still the […]