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Post subject: Blues Jr and bias
Posted: Thu Apr 01, 2010 1:44 pm
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Aspiring Musician
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Does the Blues Jr need to be rebiased on tube change or is it a cathode bias amp. I cant seem to find this info.

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Post subject: Re: Blues Jr and bias
Posted: Thu Apr 01, 2010 5:13 pm
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markara wrote:
Does the Blues Jr need to be rebiased on tube change or is it a cathode bias amp. I cant seem to find this info.


Just put in the new tubes.

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Posted: Thu Apr 01, 2010 5:53 pm
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Mark, your amp is not cathode biased, but I like Chet's advice and attitude. Art

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Posted: Thu Apr 01, 2010 6:38 pm
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LOL, I liked both answers too. Short, sweet and helpful. Thanks guys!

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Posted: Thu Apr 01, 2010 7:28 pm
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Mark, I guess you ought to take a peek at them and make sure the plate structures aren't glowing orange. We don't want a meltdown. You know how the other tubes look, with a small amount of glow at the top and bottom(maybe some blue). That's all you want to see from the EL84's. Have fun!!! Art

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