So, a little background...
I hooked a battery charger to my truck while I was at home. Later, I went out to the truck to get something and noticed my inverter was beeping with an overvoltage alarm and displaying 17 volts on the panel. After shutting the inverter off, I heard the fan running on my radio which was off at the time.
Since then, the radio will only deadkey 30 watts, max, with the variable power wide open.
I finally got around to opening the radio up to have a look last night. When you key it up on AM, one transistor heats up over 200 degrees very quickly, while the other three stay just above ambient. I'm guessing three are dead and the fourth is now way overdriven.
I don't see any blown resistors or caps. Can I just replace the transistors with a matched set and call it good? Or will something need adjustment after replacing them?
Also, the tops look to have been sanded and blacked out. From what I found on the net, they should be 2SC2879's. Anyone know for sure?
I hooked a battery charger to my truck while I was at home. Later, I went out to the truck to get something and noticed my inverter was beeping with an overvoltage alarm and displaying 17 volts on the panel. After shutting the inverter off, I heard the fan running on my radio which was off at the time.
Since then, the radio will only deadkey 30 watts, max, with the variable power wide open.
I finally got around to opening the radio up to have a look last night. When you key it up on AM, one transistor heats up over 200 degrees very quickly, while the other three stay just above ambient. I'm guessing three are dead and the fourth is now way overdriven.
I don't see any blown resistors or caps. Can I just replace the transistors with a matched set and call it good? Or will something need adjustment after replacing them?
Also, the tops look to have been sanded and blacked out. From what I found on the net, they should be 2SC2879's. Anyone know for sure?