Hi all,
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Attached is a pdf of a crystal-clear re-drafting of a S-20R schematic. Perhaps it will be of use to anyone working on one of these sets.
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All credit to the author whose username on the Antique Radio Forum is bcascisa
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Tom
On 03/06/2025 3:36 PM PST don Root <drootofallevil@...> wrote:
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An aside from ongoing topic ??S-20R mixer cct. ?…
While trying to “see” how the LO circuit works? things got me in a big knot.
C38 seems to run from some osc tanks back to the mixer RF tank area.
When I follow that I get to? the common [not ground] of the coils/transformers RF tanks? and found them to be floating = strange to me.
I am using Richard’s posted Handbook [ ohh thanks? RICHARD, GOOD SCANS] ?
IN ORDER TO separate lines so I could see I had to shift stuff and here is where I got.?? Maybe I got something wrong so need somebody to check my “re-draughting”
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don??? va3drl
Allthumbs