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Re: Philips "spark gap"

Geschreven door Henk Roovers om 26. Sep 2002 21:10:52:

In reactie op: Philips "spark gap" geschreven door Thierry Magis om 26. Sep 2002 20:48:44:

Hello Thierry,
when i got my amps, those sparkgaps were also missing, but i solved the problem as follows

1 first solution

On the solderponts of the output transformer, i soldered a bracket of copper wire of about 1mm thickness on the anode tags of the transformer. Afterwards, i cut the bracket in the middleand created a gap of about 1 mm.

2 second solution, if you can't create a stable gap.

You'll need a piece of epoxy printed circuit board, let's say 1,5 x 5cm. In the middle, drill a hole of about 10 mm dia. Remove the copper plating at the sides of the hole. So you created two soldertags, with a distance of about 10mm. Next, solder two times two pieces of copper wire, just so that you create a double sparkgap in the middle of the hole of about 1 mm. The distance between the parrallel wires isn't critical at all (say 5mm) Now you can fix the assembly with the original wiring. The hole is necessary. My first prototype burned out after a havy amplifier overload. After drilling the hole in a new assembly, the spark gap is working satifactorily


Greetings from Holland, Henk Roovers


>Hello,
>In order to finish the rebuild of two EL6435 Philips amps, I search two spark gaps like you can see on the photograph. Those components came from Philips, and are mounted between the 4 anodes of the final tubes.
>If I cannot find, can I place another component, like varistors, in this place?
>(My webpage is unreadable now! Provider in fault! The new version will come soon, with new adress. Please notice: my E-Mail has change, too!)
>Friendly greetings from Belgium,Thierry





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