While I just posted the SX-117 restoration has gone well with the BFO adjustments, a new and puzzling item

has reared its head.

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The selectivity control, which is connected to the 2^nd conversion 50 kHz IF section, is affecting the received (observed)

“S” meter level.? That is, in the 5 kHz setting, I get a certain “S” meter indication, in the 2.5 kHz setting I get higher readings

and in the .5 kHz setting, I get even higher “S” meter readings.? All on the same signal.

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Looking at? the schematic, I do not see how narrowing the selectivity of the receiver at the 2^nd IF level would affect the “S”

meter readings in the 1^st IF section where the “S” meter is connected!? While it matters little to me what the received signal

strength is, I am left wondering why this would happen as I see no direct correlation between the 1^st and 2^nd IF operation that

would affect the “S” meter.

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K2WH

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