EH Scott Radio Enthusiasts

The Fine Things are Always Hand Made

I was adjusting the sensitivity on the AM band when I lost audio for AM and all short wave bands. The FM band is still working. The radio was completely restored in 13 with attached pics. I have checked all the tubes. I pulled the chassis and could not find any glaring problem. Has anyone had this happen to their Philharmonic? I got the radio complete with no cabinet 11 years ago. It had once belonged to a ham and the original chrome is the best I've seen. I got a donor Philco at a yard sale for $10 and the face panel was made for another cabinet that was given to me. I like my Napier so much I thought I would do something like it with this Philly.

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Could be an endless list of things.  I suggest having a competent tech look at it.  The AM and the FM section only share the power supply/audio output. 

In many cases the trimmer capacitors in square boxes under the chassis become loose from the variable selectivity shaft and can move.  The cause is expansion of the pot-metal rotor collar resulting in the set screw coming loose from the variable selectivity shaft.  It is possible that a rotor section in a grid circuit has shorted to the stator section.  If it were in the plate circuits, the 1K plate resistor would have let you know (the originals blow up emitting smoke).

Norman

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