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Philco 625 Schematic Question
#11

I, too do not know the reason for the 2 lines. I, too, trust AI as far as I can throw it (or how far it can throw me). I have seen the wirewound resistors that look like a piece of cable, usually as cathode resistors for the output tube, but agree with mike (and disagree with AI that R65 is a dogbone resistor. To solve worries, replace with a 2W or 3W metal film flameproof resistor. To keep it from looking anachronistic, one can put a fiberglass woven sleeve over the resistor to disguise it. (Asbestos would be more period correct but who wants to do that.)

The interesting part of this is the purpose of the resistor and cap. It is essentially across the field coil which serves as part of the filter network. This was used in some earlier sets. (For example, a cap bridges the filter choke in the model 20, but no resistor in series with it.) However, the practice seems to have disappeared.

"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
"Let us begin to do good"- St. Francis

Best Regards, 

MrFixr55


Messages In This Thread
Philco 625 Schematic Question - by Eric E - 04-04-2026, 10:13 AM
RE: Philco 625 Schematic Question - by radiorich - 04-04-2026, 10:37 AM
RE: Philco 625 Schematic Question - by morzh - 04-04-2026, 12:07 PM
RE: Philco 625 Schematic Question - by klondike98 - 04-04-2026, 12:47 PM
RE: Philco 625 Schematic Question - by morzh - 04-04-2026, 01:32 PM
RE: Philco 625 Schematic Question - by klondike98 - 04-04-2026, 01:44 PM
RE: Philco 625 Schematic Question - by Eric E - 04-05-2026, 11:45 AM
RE: Philco 625 Schematic Question - by Eric E - 04-11-2026, 06:59 PM
RE: Philco 625 Schematic Question - by MrFixr55 - 04-12-2026, 07:39 AM



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