To Pull out local oscilator signal I put BNC connector behind the back panel. On connector terminal I connect single wire as pick up coil. I will divert this connector for digital local oscilator incoming plan.
Occasinaly I connect bared frequency counter. Local oscillator is stabilizing with installed into case. However frequency adjusting volume is critical for tuning. As intermediate frequency band width is 200kHz, it is acceptable of local oscillater frequency astability.
There are good combination for accurate frequency counter, astable local oscillator, and wide intermediate frequency.
When you encounter no work of receiver on turning on, there may be utterly simple problem or very difficult issues with several things related. Please investigate in details to pursuit the cause(s).
When you connect AC adapter and turn on, circuit is consuming current as 30-50mA. And it sounds some noize as "shar-", then you may be well to start. When you touch D2 diode or pin3 of LM386, "buun" noize shall go out from speaker. Otherwise there may be severe problems.
To check voltage on active parts nodes is something helpfull for resolving the issues. When you could not get appropriate value along below list, there may be parts broken or short/open circuit.
This type of frequency counter is very sencitive to catch the local oscillating signal not to connect with circuit node insteadly nearing the wire of counter input.
