OB2/OB2WA equivalents

Maxwell_E · 4535

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Offline Maxwell_E

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on: November 23, 2010, 06:55:26 AM
I'm trying to test some OB2 tubes at work on a Hickok 6000A tester. The problem is they don't have settings for these tubes, and a 30 minutes of googling hasn't shown any viable test settings, or even equivalent tubes that may be in the charts. Can anybody help?

Max Tomlinson
SEX amp, Tode guitar amp

Offline Doc B.

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Reply #1 on: November 23, 2010, 07:16:17 AM
Hey Max,

Do you have a specific piece of gear they fit in? If so, try them in there. If they strike and glow and the voltage at the plate pin (pin 1 or pin 5) runs at around 108V they are good. If they don't strike make sure the power supply feeding the tube is at least 130V and they are getting hit with a bit of light.

Dan "Doc B." Schmalle
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Bottlehead Corp.

Offline Maxwell_E

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Reply #2 on: November 23, 2010, 11:36:48 AM
Yea, I finally found the original service manual and they gave an in-circuit test for them. Thanks.

Max Tomlinson
SEX amp, Tode guitar amp

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