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Re: Philips "spark gap"

Geschreven door Thierry Magis om 27. Sep 2002 20:16:55:

In reactie op: Re: Philips "spark gap" geschreven door Henk Roovers om 26. Sep 2002 21:10:52:

Dear Henk,

A lot of thanks for the information. I'll try the second solution! I'll tell you when finished...

I've begin the work (and there is a lot!), with the two wrecks. I keep the 3st complete amp in its original shape.

Friendly greetings from Belgium,
Thierry


>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
>




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