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Old 29th Jan 2010, 12:21 am   #105
David G4EBT
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Join Date: Feb 2003
Location: Cottingham, East Yorkshire, UK.
Posts: 5,737
Default Re: The "Sussex" Homebrew Valve Tester.

Yes.

The Bygones/BVWS Bull capacitor reformer project by Stef Niewiadomski did just that.

It rectified the 6.3V with a 1N4007 diode which lifts it up to about 9V. A 470uF is put across the output of the diode to deck. I'd guess that these meters probably have a voltage regulator below 9V on board anyway.

If they're similar to the ones I've had, they don't come with any instructions - just four thin wires dangling off a 4-in plug on the meter. But the red wire was supply + black was supply 0, blue was the measured voltage + and green was measured voltage 0.

I'll await arrival of the one I've ordered to see if it is any more descriptive!

Have fun.

It will be interesting to see when the Sussex testers are built and put to good use, just how many cherished valves actually turn out to be duff, and won't need to be nicely boxed or catalogued after all


David,

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