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Check the value of the resistors first, they may have drifted upward, but maybe not if they were 1 Watters to begin with, no sense replacing and replicating unless you have to. As mentioned the big power resistors used as a voltage divider and for tube bias (part #25) are a common failure point as well, but you may get lucky As for anything else, the model 20 is a fairly common early 20s set (at least the Baby Grand versions) so lots of documentation and experience to be found with restoring one, some people like Mike (Morzh) have owned and overhauled several of them.
Regards
Arran
(This post was last modified: 03-24-2017, 12:16 AM by Arran.)
Messages In This Thread
RE: Philco Model 20 Lowboy - by Arran - 03-24-2017, 12:13 AM
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New Philco Repair Bench
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| I am sure this is the archive, and not the Chuck's site.morzh — 09:50 PM |
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Made mistake & did not label connection
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| It's not like we are good friends with that wire and can tell it from other ptetty identical looking wires.
Why'n't you...morzh — 09:49 PM |
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Made mistake & did not label connection
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| I'm not sure why that wire wasn't covered in the video. I'm pretty sure the 6A8 won't work until that pin is grounded. Y...RodB — 09:47 PM |
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Made mistake & did not label connection
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| You'll have to forgive me, I am not sure what you mean. Can you explain what you are really saying. If anyone does not...georgetownjohn — 08:05 PM |
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Made mistake & did not label connection
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| Those are details better left to the ones who know. Maybe you disconnected the wrong end of the wire.RodB — 06:22 PM |
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Made mistake & did not label connection
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| Maybe this is starting to make some sense in my hard head. Is this why the wire in question was not in the great Ron Ra...georgetownjohn — 04:34 PM |
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Made mistake & did not label connection
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| I was correct with the 6A8 pin connection's, 7 and 8 are connected to ground as well as the tube shield (the broken line...RodB — 02:41 PM |
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Made mistake & did not label connection
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| What does the dotted line representing that surrounds the tube in the schematic?georgetownjohn — 02:17 PM |
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Made mistake & did not label connection
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| Hello John,
I have been there either label got lost or was not labeled !
Sincerely Richardradiorich — 02:15 PM |
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Made mistake & did not label connection
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| Sorry, it is a Philco 37-640. Does that help?--Johngeorgetownjohn — 02:14 PM |
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