[Boatanchors] LK-500ZC Amplifier Help

[Mark K3MSB]

Greetings.

The gang up the radio club managed to blow the amp several weeks ago while
tuning up. They pulled out a circuit board for me to fix that has a 20 ohm
22W resistor that is blown apart.

I figured the manual would help me but the online manual, as well as the
paper one I have,are not too helpful (and I'm being polite).

Yes, I can replace the resistor, but I'd like to know what it was connected
to (and I'm not up the club where the amp is).   Normally, the manual is
helpful, but not this time.

The circuit board is 3.5 inches square and has a 12V DPDT relay, the
aforementioned 20 ohm 22W power resistor, as well as a 110 ohm resistor and
2200 uF cap along with a 4 pin molex plug.

The 110 ohm resistor is a dropping resistor for the 12V coil and the cap is
associated with that.  No problem.

When the relay is closed,  the 20 ohm 22W resistor is placed across two of
the molex pins.   When the relay is open, there is nothing across the pins.

Looking at figure B-5 of the schematic,  these could be parts C1, R6, and
K1,  but I can't find anything in the various parts list that matches.

Any help is appreciated.

73 Mark K3MSB