Building the OCXO/Si5351A kit from QRP Labs

Some posts ago, I spoke about the possibility of using the OCXO/Si5351A synth kit from QRP Labs as a low cost way of providing an external stable 27MHz reference to a satellite LNBF. I’ve received and built my kit some days ago, so here I will be looking at some aspects in the construction and performance of this kit.

Calibrating the S-meter in Linrad

In a previous post, I talked about the GALI-39 amplifier kit from Minikits. Here I will describe the procedure to calibrate the S-meter in Linrad (or another SDR) using this amplifier or any other amplifier with a known NF and an uncalibrated signal source. Leif Åsbrink has a youtube video where he speaks about the calibration of the S-meter in Linrad. However, he doesn’t use an amplifier, so I will be following a slightly different procedure.