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Egnater / Randall Modular Amps
Shorted tubes hurt my baby. Can anyone help?
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<blockquote data-quote="mThomasDutch" data-source="post: 79371" data-attributes="member: 2616"><p>Soooooo, after an hour or so of troubleshooting this problem, we ruled out grid resistors and the OT. Only after applying a sine at the input and checking for AC on the grids of the power tubes were we able to trace the problem back. It was really bizarre - something I've never seen before. It was... wait for it... a shorted 12AX7 in the phase inverter position. It was likely that this tube shorting cause the power tubes to haul arse toward meltdown and blow the fuses. She seems to be fine now. One bullet dodged. Thank all of you for your advice.</p></blockquote><p></p>
[QUOTE="mThomasDutch, post: 79371, member: 2616"] Soooooo, after an hour or so of troubleshooting this problem, we ruled out grid resistors and the OT. Only after applying a sine at the input and checking for AC on the grids of the power tubes were we able to trace the problem back. It was really bizarre - something I've never seen before. It was... wait for it... a shorted 12AX7 in the phase inverter position. It was likely that this tube shorting cause the power tubes to haul arse toward meltdown and blow the fuses. She seems to be fine now. One bullet dodged. Thank all of you for your advice. [/QUOTE]
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Modular Amps
Egnater / Randall Modular Amps
Shorted tubes hurt my baby. Can anyone help?
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