Re: tricks for repairing bad traces on amp circuit board?

In article <4319dd6a$1@xxxxxxxxxxxxxxxxx>,
"Jelly Roll" <donteven@xxxxxxxxx> wrote:

> Yes, it's in parallel with the heater elements for the 4 output tubes.
> The thing is, the wire I used (not sure the gauge) is about the size of
> resistor leads. I was thinking if the resistor leads can handle the current
> that the wire ought to, was that faulty thinking?
>
> The tap says it is 6.3 volts AC on the secondary, but I measured it in
> circuit at less than 5 v.

That's bad. Something is loading the secondary beyond normal heater
draw. Have you measured the voltage drop across the half-ohm resistors?
Are the resistors still at stock value? If so, if you are seeing more
than 2A through this resistor (1V across), you have a low R to ground
path somewhere. Bad tube, shorted diode, who knows? (is there a zener
on the DC part of the supply?) Something. A 6.3V secondary should
deliver 6.3V across a normal load If you disconnect the transformer
entirely, you should see something like 7V across the secondaries.
Hopefully the transformer isn't shot.

--Mike

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Mike Schway | [Picture your favorite quote here]
mschway@xxxxxxx |
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