CRYSTAL MIXER EXCITER FOR 137KHZ All my attempts to construct any sort of VFO/synthesiser/divider have ended in failure. I am not sure why I have such a reliable failure rate with digital circuits -
Dear OM Peter, G3LDO, I also had bad results with VXO drift both in single X-tal and in mixed settings. I found out that the old big type X-tals in the range between 5 and 9 MHZ are most suitable for
[...] I came accross a nice synthesizer kit. With a frequency range between 1 Hz (!) and 54 MHz (!) it is a real overkill for the LF band, but the features contained in it are excellent for what we