ampage Tube Amps / Music Electronics |
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Satamax | Tuning calibrating of my valve tester? Hi everybody! Well, i've bought a valve tester http://satamax.free.fr/provavalvole.jpg I would like to understand more about it. How do i calibrate it? What test thoses µA relate to? Isolation, or emission? Both? Could i improve it, to calculate the transconductance and other parameters, beside isolation and emission? Thanks and best regards. Max. |
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Jack | Hi Max, Never seen that type of tester before, at a guess I would say it's an emission tester. I'm sure there's others on this forum who will pipe in soon with advice. If it's fairly old, I usually update the caps, check all resistors for drift, burn marks ect, clean all switches and sockets before putting it into service. See if you can download a schematic for it and check all voltages ect. Jack |
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The Ultimate Tone, Volume III by Kevin O'Connor
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Satamax | Thanks a lot Jack! Well, it's an emission and shorts tester. There's very few components in there ![]() ![]() Bye. Max. |
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John Culp![]() |
If it's an emission and shorts tester, you can't test transconductance. You need a transconductance tester for that. |
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Satamax | Thanks a lot John! Well, what brand of tested could i get cheap enough? I paid this one about 120 zoros, i'm keen on an AVO or a B&K , but realy i don't have the dough for one ![]() Bye. Max. |
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John Culp![]() |
I just bought off of eBay for $90 plus shipping an EICO 666. It doesn't exactly measure transconductance, but that's pretty much what its "dynamic conductance" testing actually is. There's a good section on various tube testers to be found at: http://tone-lizard.com/ |
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