[AMRadio] HQ129X 3rd IF

CL in NC mjcal77 at yahoo.com
Fri Dec 23 09:51:33 EST 2011

Well, somebody was ambitious with mods in this 129X.  The industrious fellow copied most of the first IF's circuitry into the third IF, and also installed a ring-tip-sleeve jack on the front panel to operate a mute circuit by lifting the ground connection of the 100ohm resistor from the gain control.  It's all back to schematic normal now, but still have a hole in the front panel.

Charlie in NC

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