[HAM] HR-40 blowing 5U4

[Ray Winkel]

Sounds like a bad filter cap to me.  (the big cans)  Check them for shorts.

Ray

On 10/3/06, Christoph P. Kukulies <kuku at kukulies.org> wrote:
>
> When I switched on my HR-40 (which has been resting unused for
> quite some time), both 5U4 were starting fireworks in them.
> Flashing and orange sparks on both tubes simultaneously.
>
> LR 1D is stamped on the amp chassis.
>
> I'm a bit hesitant to put two new 5U4 into it without being sute
> that the cause is identified before that.
>
> Any ideas? Possibly the oil filled can capacitor?
>
> Can one replace the two 5U4 by two 1N4007 without changing the amplifier
> characteristics? I mean, would one give up something WRT sound when
> using silicon rectifiers?
>
> I would guess the output power would be a bit higher but
> the 'compression' characteristics go away.
>
>
> --
> Chris Christoph P. U. Kukulies kuku_at_kukulies.org
>
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