[Elecraft] K3 Fuse Blowing on Power Supply

[W3FPR]

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 current draw will be less.

73,
Don W3FPR

On 5/6/2023 2:30 PM, Bill Gillenwater wrote:
> 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 LOW VOLTAGE.