So, I've been wracking my head around this rig interface I've been working on. Couldn't get the damned rig to TX no matter what.
So, I finally figured out my interface wasn't the problem. The PTT doesn't work on it. I finally had the duh moment, and tried to just short the two PTT lines together right from the mic jack. no dice.
So, it's a Kenwood TM-241A. This is my first foray into radio troubleshooting, and from what I see in the service manual, basically, the PTT goes from the switch to a 1.7KOhm resistor, then into the CPU.
I've tried a reset, JIC. No dice. However, I'm at a loss to see which of these SMD thingies are the resistor.
Any input?
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