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Modular Amps
Egnater / Randall Modular Amps
Help - Power Tube 1 registers 0 MV on bias
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<blockquote data-quote="CrazyNutz" data-source="post: 152528" data-attributes="member: 3658"><p>The tube will still light up even if that fuse is out, because that is a separate circuit called the heater/filiment circuit.</p><p></p><p>That fuse is the high voltage (B+) fuse for the tube. You will get no bias reading if it is blown.</p><p></p><p>Since you say the fuse is good, next thing I would check is the Screen Resistor for that tube. You have to remove the chassis. It will be a big white rectangular 1k 5w resistor near the tube socket.</p></blockquote><p></p>
[QUOTE="CrazyNutz, post: 152528, member: 3658"] The tube will still light up even if that fuse is out, because that is a separate circuit called the heater/filiment circuit. That fuse is the high voltage (B+) fuse for the tube. You will get no bias reading if it is blown. Since you say the fuse is good, next thing I would check is the Screen Resistor for that tube. You have to remove the chassis. It will be a big white rectangular 1k 5w resistor near the tube socket. [/QUOTE]
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Modular Amps
Egnater / Randall Modular Amps
Help - Power Tube 1 registers 0 MV on bias
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