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I added a 500pf in series with the internal cap, no change then I noticed number on the side of the block holding 2XA and 2XB. It said 110 so I though maybe this is the value of the internal cap so I disconnected the internal and put in a 110. Now the trimmer peaks and the volume is what it should be. I'm going to change the 2XB cap. The 2XC cap has a 160 number which I assume will be 160pf. Finally getting somewhere.
Now to figure out why the AVC voltage is not changing. Is the 6R7 grid the proper place to measure that. if I measure the grid of the 6A8 tube the voltage varies when going off and on stations.
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RE: Philco 38-2 Low Volume - by dconant - 11-14-2024, 07:35 PM
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