Total posts : 45366
I used some old table top tube type radios back in the day. You want to avoid the ones without a power transformer as one side of the chassis is hot at line potential presenting a shock hazard! And they all have high voltages inside,so be forewarned! Having said that,I would look for a screen grid on the mixer and tap the LO signal there for the antenna with a series DC blocking cap. Then,I would feed the audio in the first grid with a DC blocking cap. Different radios had different places to tap and I found them by experimentation. Try this little trick,it works with all receivers. You will need two radios close to each other,set one to mid band,1000kc’s and tune the other one slowly downband about 455 kc’s lower and you will hear the local oscillator,offset by the i.f. frequency. A Bearcat scanner becomes a signal generator by entering a frequency 10.245(some 10.455) higher(maybe lower?) than the frequency desired. Have fun! Regards,Lee
