[MrFixr55]

Hi Mr. Big,

There is only slight variation between manufacturers on the "AA5 (or AA6) circuit. Similar AC-DC radios of the AA5 or AA6 type have about 100 - 110V at the rectifier cathode, about 100V at the Audio Output plate and about 80-90V at the Output tube screen (the B+ to all the other circuits. B+ on the 1st Audio plate is typically low, in the 60V range or lower.

I am a believer in "divide and conquer troubleshooting.

Safety first!. Use an isolation transformer or make doubly sure that the chassis is at neutral potential when testing. Most folks move the power switch to the "hot" side of the circuit and installl plarized line cords to ensure that the chassis does not become hot.

After taking the above precautions, inject a battery powered audio source (CD Player, etc.) at earphone volume level between the 2 legs of the volume control. You should be able to get strong, clear audio.

If you can receive an over the air station, your oscillator works. If you get static while turning the tuning control, inspect the capacitor carefully for shorting. Plates can bend and aluminum corrosion between the plates may cause intermittent shorting.

This radio should be able to pick up whatever any other radio in your house can pick up, even with a relatively short wire, due to the RF Amplifier. However, do try an antenna of at least 20 feet, dropped out the window.

The plethora of computer driven devices, CFLs, LED bulbs, etc. make the average house a hostile environment for AM radio reception, particularly for those radios that do not use a ferrite antenna.