08-15-2008, 08:38 PM
Hi:
Just obtained a Philco 42-380 and was trying it out to see if it worked. Nice radio with great cabinet for restoration. Problem, When I turn it on it just hums, with no change when the volume is adjusted, or tuned to another station or band.
I pulled all the tubes and tested same, most were OK. A few were in the questionable range, the two 42s and one of the 7B7 tubes.
It seems like perhaps a bad capacitor, or capacitors, especially with no change when the volume control is sdjusted, just the same loud hum.
Two questions in light of the fact I am a novice:
1. What do you think is wrong and what should I try first?
2. Do you know of a good trouble shooting book for these radios that describes various problems and what to look for and and how to repair the problem?
Thanks much for the help,
God bless one and all,
Dave B
Just obtained a Philco 42-380 and was trying it out to see if it worked. Nice radio with great cabinet for restoration. Problem, When I turn it on it just hums, with no change when the volume is adjusted, or tuned to another station or band.
I pulled all the tubes and tested same, most were OK. A few were in the questionable range, the two 42s and one of the 7B7 tubes.
It seems like perhaps a bad capacitor, or capacitors, especially with no change when the volume control is sdjusted, just the same loud hum.
Two questions in light of the fact I am a novice:
1. What do you think is wrong and what should I try first?
2. Do you know of a good trouble shooting book for these radios that describes various problems and what to look for and and how to repair the problem?
Thanks much for the help,
God bless one and all,
Dave B
