tube temps

OTL Asylum

OTL, Output Transformerless Amplifier User Group.

Greetings 6as7g folk - I am just posting a finding today that was quite by accident . I was building my second monoblock whilst the first was running beside me ...Oh what a joy ! . Being in a workshop environment , I had a Fluke Temp probe & display handy ...and measured each tube . They were basically around the 110 - 120 degrees C ...but I did find one tube that was 140 + deg C ....which had me wondering why ~ So on its side she went , and found that the voltage drop across the 1 ohm resistors was much higher than the other tubes ...( and that was both sections ) ..so this tube was working quite alot harder than the others . Am I correct by this , in saying , that this tube has more gain ? ...I dont have a tube tester to compare results . BTW the bias current was set around 500 ma on the ammeter . Man , I just cant wait till the second is finished (:-)
Stu

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Parts Connexion

Topic - tube temps - Satelliteman 00:43:27 08/04/06 (8)

What DaveInVA said... - Lew 08:39:09 08/04/06 (6)

Re: What DaveInVA said... - Satelliteman 16:14:41 08/05/06 (5)

Re: The newer amps - Ralph 08:18:24 08/07/06 (4)

Hi, Ralph. - Lew 12:20:42 08/07/06 (3)

Re: Cathode output - Ralph 12:37:27 08/07/06 (2)

Re: Cathode output - tubevibb 08:12:28 08/22/06 (0)

Re: Cathode output - Satelliteman 23:43:24 08/07/06 (0)

You might want to weed that one out.. - DaveInVA 08:22:15 08/04/06 (0)

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