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Modular Amps
Egnater / Randall Modular Amps
RM 80 crackle problem
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<blockquote data-quote="CrunchBunch" data-source="post: 150899" data-attributes="member: 3591"><p>I've got two identical RM80 combos (they're basically an RM50 with 6550 power tubes and 2 x Celestion G12T-75 speakers arranged diagonally in the case).</p><p></p><p>On one of them, when using high gain modules I get a crackle in the background which becomes audible when a struck power chord decays.</p><p></p><p>It's almost as if something is loose inside and is causing the crackle. It is not an issue at lower volumes.</p><p></p><p>Having two means I've been able to test all of the usual suspects, like microphonic tubes, bad modules etc. Swapping everything back and forth has not helped. Running the head outside the combo and probing around inside with an insulated tool has also not revealed any loose connection etc.</p><p></p><p>Does anyone have any ideas? I've even played it removed from the case in the pitch dark to see if there was any arcing, but could detect nothing of the sort.</p></blockquote><p></p>
[QUOTE="CrunchBunch, post: 150899, member: 3591"] I've got two identical RM80 combos (they're basically an RM50 with 6550 power tubes and 2 x Celestion G12T-75 speakers arranged diagonally in the case). On one of them, when using high gain modules I get a crackle in the background which becomes audible when a struck power chord decays. It's almost as if something is loose inside and is causing the crackle. It is not an issue at lower volumes. Having two means I've been able to test all of the usual suspects, like microphonic tubes, bad modules etc. Swapping everything back and forth has not helped. Running the head outside the combo and probing around inside with an insulated tool has also not revealed any loose connection etc. Does anyone have any ideas? I've even played it removed from the case in the pitch dark to see if there was any arcing, but could detect nothing of the sort. [/QUOTE]
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Modular Amps
Egnater / Randall Modular Amps
RM 80 crackle problem
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