I found those 4.224 Crystal oscillators (ex equipment) on eBay .
Divide 4224 by 32 (first 8 and then make the quadrature signals), and the LO frequency ends up on 132 kHz. Not bad for a 136 kHz SDR.
QRP-LABS 5Watt PA - I am still struggling to make a "simple" 5Watt PA for the 1.8 - 50MHz range The QRP-LABS 5W PA could not deliver more then 1W at 28MHz using the original...
8 minutes ago