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Old 11th January 2013, 04:35 PM   #1
cotdt is offline cotdt  United States
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Default How to build a transconductance tester for small driver tubes?

I was wondering if I can convert one of my amps into a tube tester for small driver tubes. Can anyone point me in the right direction?
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Old 11th January 2013, 04:41 PM   #2
kevinkr is offline kevinkr  United States
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Take a look at this design.. I'm planning on getting one in the near future if the software is compatible with at least one of the windoz boxes I have on hand..

Here: The uTracer, a miniature Tube Curve Tracer / Tester.
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Old 11th January 2013, 04:42 PM   #3
cotdt is offline cotdt  United States
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Whoa, that is cool! Thanks for the info!
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Old 11th January 2013, 07:47 PM   #4
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Quote:
Originally Posted by kevinkr View Post
Take a look at this design.. I'm planning on getting one in the near future if the software is compatible with at least one of the windoz boxes I have on hand..

Here: The uTracer, a miniature Tube Curve Tracer / Tester.
The software is compatible with windows xp, and windows 7, and I think also windows vista. I didn't test on windows 8. You do need a serial port, but you can also use an usb to serial convertor, see the text on the website.
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Old 11th January 2013, 08:03 PM   #5
Merlinb is online now Merlinb  United Kingdom
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I think this is about as simple as they come:
The Valve Wizard
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Old 13th January 2013, 01:06 AM   #6
cotdt is offline cotdt  United States
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Awesome awesome.

One thing I wonder is if I can lower the plate resistance of a 26 at higher current for an all-DHT project. The datasheets don't run the current very high.
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