Bill,
The K3 will draw between 17 and 22 amps during transmit. That 15 amp
fuse is too small, increase it to 25 amps. Hopefully your power supply
is capable of 25 amps or more.
Use a power supply that has 14.3 volts output if you can. Not only will
your TX be cleaner (lower IMD), but the c
There is an over voltage protection diode inside. Maybe it was tripped?
Easy to replace.. I think it is right rear when looking from the top and
front of the radio. Just a short HV spike can trigger that diode. You
can find it on the K3 schematic.
Dave K1WHS
On 5/6/2023 2:30 PM, Bill Gillenwa
Current setup.
K3 with P3 early serial. Back to factory for complete update. Gold Pins etc.
Today K3 shut down.
Found blown 15 amp fuse in ground side of power supply cable
Power supply is MFJ 4035MW.
Have had no previous problems with this setup.
Occasionally there was a message on the K3 saying
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