On Aug 29, 2006, at 9:01 AM, Peter Chadwick wrote:
> Rich said:
>
> >> It could be that a present padder cap has opened up
>
> In my experiences, they don't open, they short because the dielectric
> punches through.<
>
> I have had two ceramic tx caps go open - the voltage rating was OK,
> but the things heated up and burnt the silvering away without
> apparently punching through. That wasn't on a TL922 though, and
> mostly, the failures I've seen have been dielectric failures as
> Rich says. But not invariably.
Agreed, Peter. The "Plywood Box" amplifier melted several droplets
of silver solder out of a 200pF, 7500wv doorknob cap, but that was
not a typical case.
>
> 'There are more things in heaven and earth Horatio, than are dreamt
> of in your philosophy'
>
>
> 73
>
>
> Peter G3RZP
R L MEASURES, AG6K. 805-386-3734
r@somis.org
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