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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.
Messages In This Thread
RE: Philco 38-2 Low Volume - by dconant - 11-14-2024, 07:35 PM
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Recent Posts
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B&K 1077B no video
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| Hello Tim,
I would if it's a leaky Capacitor So are all 3 of those B- voltages low then ?
Sincerely Richardradiorich — 01:55 AM |
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B&K 1077B no video
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| I found a schematic and think I have the problem traced down to the minus power supply. I have very low voltages that go...TV MAN — 12:41 AM |
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| I'd try replacing the bulb first and if that doesn't do it, then change the 35Z5 and see if the problem goes away.NostalgiaRadioTime — 12:28 AM |
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B&K 1077B no video
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| Hello Tim,
I have that exact unit in my shop too plus a Sencore unit there are times I like one or other !!.
Sincerely...radiorich — 11:07 PM |
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And I suspect whoever repaired it, wanted to re-use old transistors' pin stubs in o...morzh — 09:24 PM |
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B&K 1077B no video
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| Hello Tim,
Here is a link to restoration of one on Phil's old radios site !
Sincerely Richard
bk1077bradiorich — 09:01 PM |
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