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In this diagram you can see that the red wire attaches to one side of the 5K adjustment pot, and it is the only thing connected to that side of the pot.
the black wire gets attached to pin 9 of the mic switch. the switch may not be labeled so you can confirm you have the right pin by using your multimeter set to read continuity.
most meters these days will have a setting that will beep when you touch the meter probes together allowing you to find two points on a circuit board that are connected without having to look at the meter.
If you put one probe on the shield wire of the mic cord and the other on one of the solder lugs on the back of the switch, you can find out which pin is pin 8, which will be right next to pin 9.
you would also notice continuity if you put the probe on pin 7 since pin 7 and pin 8 are connected in receive.
if you were to put a rubberband on the mic button so it stays keyed, you would find that you have continuity from the shield wire to pins 8 and 9 because the idea is to only ground the negative terminal of the battery when you push the mic button.
they do it this way so that the battery doesn't go dead from just sitting there.
now that you know which pin on the switch is pin 9, you can put one of your probes on pin 9 and then touch it to one of the solder pads where the battery wire pulled out of.
if you get a beep from your meter, you know you've found the right pad for the negative side of the battery.
you can do the same for the positive side by putting one meter probe on the empty side of the 5K pot, and then the other probe on one of the solder pads where the battery wires pulled out. if you get a beep you've found where the positive wire will solder to.
LC
