Re: Homebrew Valve Tester
I am not interested in a transformer but here are my thoughts on the subject:
Some of the power tubes have a plate dissipation in excess of 35 watts. It is always best to test a tube in a setting which is close to its intended use. Similarly some tubes are tested at 250V / 100mA anode current (e.g. 6L6-GC).
I found a toroid on eBay from a seller in Hong Kong which does 200 mA which is a bit overkill. When I was buying this I was aiming for a HT winding of 275 - 300 V @ 135 mA.
Hope this helps, AM.
|