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Model 20 mystery wire?
Mondial
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#4

06-12-2013, 08:22 AM
No, it goes to terminal 2, which is the tap on the resistor for the grid bias of the 27 and 71A audio stages.

Faraday shield would be a good choice if it went directly to chassis ground terminal 3, but it does not.

Perhaps it is the connection to the center tap of the 2.5V filament winding? The schematic shows the center tap of the HV winding and the 2.5V winding both connected to terminal 6. Maybe they separated them, but I don't know why as they both connect to the same terminal 2 of the resistor.
(This post was last modified: 06-12-2013, 08:24 AM by Mondial.)
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Messages In This Thread
Model 20 mystery wire? - by Mondial - 06-11-2013, 09:12 PM
RE: Model 20 mystery wire? - by GarySP - 06-11-2013, 09:26 PM
RE: Model 20 mystery wire? - by exray - 06-12-2013, 03:51 AM
RE: Model 20 mystery wire? - by Mondial - 06-12-2013, 08:22 AM



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