Posts: 1,824
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Joined: Jul 2014
City: Sneedville, TN
I have come to a dilemma, and hope those more expert than I, who have dealt with this model radio can give me some guidance. As I am delving into the power - final audio end of the receiver, I am making a careful map of everything, and where it goes, and where it connects. In doing so I have come to a problem about part 51. On the schematic, and in the parts list it is shown to be a 70K resistor, yet in the radio itself it appears to be a 10K resistor, and it appears to be original and never changed. Was this a mistake in construction, or a change made along the way which I haven't seen in the notes? What was it in your own 37-640s? I would appreciate any advice about this. Here are pertinent pictures...
[Image: https://66.media.tumblr.com/3a1050edb586...38a3df.jpg]
[Image: https://66.media.tumblr.com/be071c5c91ad...3ff325.jpg]
[Image: https://66.media.tumblr.com/7b77097d4a0c...d03ab6.jpg]
[Image: https://66.media.tumblr.com/90e00d435b4c...d0ff0a.jpg]
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Recent Posts
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Electrolytic restuffing/internals
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| I don’t have a vise so I had to hold it in my
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I have a few...bridkarl — 11:52 PM |
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Electrolytic restuffing/internals
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| Bridkarl
A question.
For a hacksaw the cut looks a little...jagged. Why?morzh — 11:45 PM |
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| As usual, an interesting post from you, Peter. This seems to be similar to the RCA 3-BX-671 and the Zenith Transoceanic...MrFixr55 — 11:41 PM |
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| Hello Peter,
Thank you for sharing your new video and looks like your weather is nice their too.
it was like 25 Cel...radiorich — 11:05 PM |
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Electrolytic restuffing/internals
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| hello bridkarl,
I will post some better photos !
Sincerely Richardradiorich — 10:14 PM |
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Electrolytic restuffing/internals
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| I just taped the two pieces of the cap together, but I can see your method is better. I just held the lead in with solde...bridkarl — 08:18 PM |
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Electrolytic restuffing/internals
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| hello bridkarl,
Well done !
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philco predicta
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| Hi CGL18,
Here is a link for the schematic from the Early television Foundation:
WARNING!! One side of the Chassis i...MrFixr55 — 08:09 PM |
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The list of my radio & TV collection!
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| Peter;
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Electrolytic restuffing/internals
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Did as suggested. Cut can with hacksaw, removed internals, attached new 8mf cap - with ample use of cardboard and elec...bridkarl — 03:36 PM |
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