vacuum tube testing
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Posted by Donald Ennis on June 5, 2008, 11:03 am
Please log in for more thread options have used several tube testers which are inoperable now. I have access to power supplies, meters, scopes, fixtures and fixturing equipment and supplies. I have the specs for the tubes but I'm unsure about setting up the tests and interpreting the results. If anyone can help please post back. Thanks, Don | |||||||||||||||||||||||||||||||||||||
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Posted by Tim Wescott on June 5, 2008, 11:15 am
Please log in for more thread options fixing one of your proven tube testers rather than trying to build one from scratch. -- Tim Wescott Wescott Design Services http://www.wescottdesign.com Do you need to implement control loops in software? "Applied Control Theory for Embedded Systems" gives you just what it says. See details at http://www.wescottdesign.com/actfes/actfes.html | |||||||||||||||||||||||||||||||||||||
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Posted by Dave on June 5, 2008, 11:35 am
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>>
> I can only observe that you may be best served by spending your time
Yeah, what he said.
> fixing one of your proven tube testers rather than trying to build one > from scratch. > > -- > | |||||||||||||||||||||||||||||||||||||
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Posted by Dave on June 5, 2008, 11:34 am
Please log in for more thread options Call your local music store that advertises servicing guitar amps. Whoever
does the work likely has a tester, or knows somebody who does. I picked up an old tester recently, it'll tell you good/bad, but no good for gain matching, it's not a mutual conductance tester. Or just buy one. Never heard of anybody making their own, even the hard-core geeks on AudioAsylum and AudioKarma don't do it, there's probably a reason for that... I saw an on-line video about Manley Labs (tube amp manufacturer) in California... they've got a nifty computerized rig where a computer controls the inputs and monitors the outputs of tubes being tested... I am sure if tubes were still used in large quantities such software would probably be available for free on the internet. Dave >I need some assistance with testing some 6EJ7 vacuum tubes. In the past I
>have used several tube testers which are inoperable now. I have access to >power supplies, meters, scopes, fixtures and fixturing equipment and >supplies. I have the specs for the tubes but I'm unsure about setting up >the tests and interpreting the results. If anyone can help please post >back. > > Thanks, > Don > | |||||||||||||||||||||||||||||||||||||
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Posted by ian field on June 5, 2008, 3:34 pm
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> Call your local music store that advertises servicing guitar amps.
> Whoever does the work likely has a tester, or knows somebody who does. > > I picked up an old tester recently, it'll tell you good/bad, but no good > for gain matching, it's not a mutual conductance tester. > > Or just buy one. Never heard of anybody making their own, even the > hard-core geeks on AudioAsylum and AudioKarma don't do it, there's > probably a reason for that... Home brew CRT testers were very common in the service trade, the most difficult part was rigging the interchangeable bases for all the different CRT types. | |||||||||||||||||||||||||||||||||||||
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> have used several tube testers which are inoperable now. I have access to
> power supplies, meters, scopes, fixtures and fixturing equipment and
> supplies. I have the specs for the tubes but I'm unsure about setting up
> the tests and interpreting the results. If anyone can help please post
> back.
>