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@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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