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Modular Amps
Egnater / Randall Modular Amps
Looking for ideas for my ailing RM100
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<blockquote data-quote="stpetecubby" data-source="post: 82502" data-attributes="member: 2681"><p>Hey guys,</p><p></p><p>I've got a RM100 that has the power output severely limited. It made a loud pop a couple weeks ago, and I didn't think much of it at the time, but later realized that for where the levels were set and where the master was set, it should have been screaming loud. I did a sanity check with the RM20, which (sadly) blows the RM100 away right now.</p><p></p><p>I did some reading here about problems that people have had, and I'm starting to worry. I checked the 4 external fuses, I found 7 fuses inside (are there more hidden?). All of the elements looked intact. I put all of the tubes on a tester, and found them all to test strong without any shorts. I also swapped the 12AX7s for some vintage tubes. Everything glows. I haven't checked the bias yet to see if something in the bias circuit was damaged. When I was inside the amp, I didn't see any vaporized semiconductors, no capacitor explosions, no burned traces, nothing out of the ordinary. Doesn't matter which channel its on.</p><p></p><p>Any ideas on things to check? Or should I proceed to panic mode and prep to send this thing into Randall? My biggest fear is having cooked the primary of the OPT.</p><p></p><p>Thanks for your help guys.</p><p></p><p>Jeff</p></blockquote><p></p>
[QUOTE="stpetecubby, post: 82502, member: 2681"] Hey guys, I've got a RM100 that has the power output severely limited. It made a loud pop a couple weeks ago, and I didn't think much of it at the time, but later realized that for where the levels were set and where the master was set, it should have been screaming loud. I did a sanity check with the RM20, which (sadly) blows the RM100 away right now. I did some reading here about problems that people have had, and I'm starting to worry. I checked the 4 external fuses, I found 7 fuses inside (are there more hidden?). All of the elements looked intact. I put all of the tubes on a tester, and found them all to test strong without any shorts. I also swapped the 12AX7s for some vintage tubes. Everything glows. I haven't checked the bias yet to see if something in the bias circuit was damaged. When I was inside the amp, I didn't see any vaporized semiconductors, no capacitor explosions, no burned traces, nothing out of the ordinary. Doesn't matter which channel its on. Any ideas on things to check? Or should I proceed to panic mode and prep to send this thing into Randall? My biggest fear is having cooked the primary of the OPT. Thanks for your help guys. Jeff [/QUOTE]
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Modular Amps
Egnater / Randall Modular Amps
Looking for ideas for my ailing RM100
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