On Tue, Jan 10, 2023 at 06:10 PM, Richard Knoppow wrote:
Correction: the S-77 is AC/DC of the S-40B .? The socket is to run the receiver from batteries.? I did not look at the schematic to see how it's arranged.? On the AC only version the filaments are in parallel and run off? 6 volt battery while a seperate B battery supplies the plate voltage.? The filaments on the S-77 are in series so, presumably everything can run off a single battery in the absence of a DC main supply. So, the S-77 is really a three-way receiver: AC, DC and batteries.
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hi again Richard and others
I hate to quibble, but i looked up some info and saw a rear pic of the S-77 and has no octal socket and not much at all, but the S-77A schematic clearly has an octal socket, largely for DC of some sort.
as for the S-40B; they say it has no octal receptacle while earlier versions do.
so I am left wondering more than before
73 ? ?? don VA3DRL?
don Root