[TenTec] 422 Centurion blowing fuses...

[PC Anderson]

I would pull the plate caps off first and see if ur still blowing fuses.Andy

Talk is cheap, Action counts!

>
> one of the tubes may be shorted take them out and check the pins for shorts 
> 73 Rod
> 
>
> 
> I have a Tentec 422 Centurion that is blowing the main 20 Amp fuses...
> 
> Looking for insights to this amp failure.  It started spontaneously.
> I can turn on the main power OK and the filaments light up on the
> 3-500Zs.  The 12 volt power supply is OK because the pilot lights come on.
> However when I flip the standby - operate switch to the Operate positionm
> the fuse or fuses will blow.  I replaced them with good 250V 20A cuses.
> 
> I checked the plate transformer windings and everything seems normal for
> all three windings. Nothing is shorted. The safety ground for the cover-open 
> condition is not
> across the HV plate supply. I checked that nothing else is shorting out the 
> plate supply
> either.
> 
> Does anyone have any idea what might be going on here?
> 
> Many thanks - Brian Carling, AF4K
> 
> 
> 
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