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Modular Amps
Egnater / Randall Modular Amps
Shorted tubes hurt my baby. Can anyone help?
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<blockquote data-quote="kc2eeb" data-source="post: 79379" data-attributes="member: 811"><p>Exactly where I was going next. I play my amp with all the master</p><p>volumes full up. With 6V6s (JJ) with an idle bias of 19 and 21ma, even thought on my Longhin Lo460 tube matcher they are within .75 ma each </p><p>to 460 volts on the plates, when playing full out, V5 draws 100 to 115</p><p>ma while V4 draws near 200 ma and starts to red plate. I've seen this happen when the screen grid resistors start to fail towards open or </p><p>a grid resistor problem. </p><p>Glad you found the problem. Will let you know what I find.</p></blockquote><p></p>
[QUOTE="kc2eeb, post: 79379, member: 811"] Exactly where I was going next. I play my amp with all the master volumes full up. With 6V6s (JJ) with an idle bias of 19 and 21ma, even thought on my Longhin Lo460 tube matcher they are within .75 ma each to 460 volts on the plates, when playing full out, V5 draws 100 to 115 ma while V4 draws near 200 ma and starts to red plate. I've seen this happen when the screen grid resistors start to fail towards open or a grid resistor problem. Glad you found the problem. Will let you know what I find. [/QUOTE]
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Modular Amps
Egnater / Randall Modular Amps
Shorted tubes hurt my baby. Can anyone help?
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