[TenTec] TenTec Centaur Model 411

[Mike Bryce]

bud,

a simple test

unplug the secondary of the transformer from the power supply filter caps

replace fuses and try to power it up. if the fuses hold, the capacitors/diodes are at fault

If fuses blow, then suspect transformer 

how are you checking the capacitors and diodes?

There is a shorting bar that drops across the plate of one of the tubes, it’s possible that something as simple as a loose screw may have cause the shorting bar to in fact short.

if you have the amp on 110V ac mains, a old 100 w light bulb in series with the power lead will keep you from popping fuse after fuse. If there is a short, the light will go full on, and without taking out the fuse.


Mike, WB8VGE
www.theheathkitshop.com



> On Apr 5, 2019, at 11:51 PM, budw2gln--- via TenTec <tentec at contesting.com> wrote:
> 
> 
> Query ...
> Has anyone that has a TenTec Centaur Model 411 amplifier experienced a problem where it constantly blows the AC fuses
> F1 and or F2.....I fear it's the power transformer ....But...This one tests good primary & secondary and the P/S bridge and Cap boards also check ok... Any suggestions....
> Thanks
> 73
> Bud  W2GLN
> 
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