[MrFixr55]

Hi RGK,

What make / model is the radio? Did it play before you rewound the filed coil? Was the hum there then?

It is quite possible that the hum is from another source. With the radio off, carefully check lead "dress". Ensure that the audio leads and coupling caps for the volume control are as far away from the power cord as possible. Make sure wiring for the tube filaments are as close to the chassis as possible and other coupling caps and resistors are as far away from the filament circuit wiring as possible.

If the 1st Audio tube has a grid cap, adjust the cable so that it as close to the chassis or tube shield as possible. Some sets, especially some Philcos have that cable run inside the tube shield.

Further troubleshooting can be done. If this is a transformer powered set, unplug the IF tube. Is the hum less? if so, then the hum is coming from before the audio stage. Reinstall the tube and unplug the converter. Compare hum level to the previous test.

Hope that helps.