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Modular Amps
Egnater / Randall Modular Amps
RM50 problem
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<blockquote data-quote="kc2eeb" data-source="post: 142475" data-attributes="member: 811"><p>Earlier PC boards were prone to arching due to the clearance of the high voltage circuit board traces. When I changed the power amp circuit board on mine, along with the output transformer, I measured the actual clearances between the traces. They did conform to the MEC (minimum electrical clearance), .125" in this case, but, evidence of arching was present.</p><p>http://mtsforum.grailtone.com/viewtopic.php?t=12785&highlight=lots+pictures+rm50+repair</p><p>MEC are for an ideal situation, but, if there is any contamination, high humidity, near salt water, etc. a larger clearance is necessary.</p><p>Since you're going to send it to Rob, who will do an excellent job, just ship the amp and it'll be taken care of.</p></blockquote><p></p>
[QUOTE="kc2eeb, post: 142475, member: 811"] Earlier PC boards were prone to arching due to the clearance of the high voltage circuit board traces. When I changed the power amp circuit board on mine, along with the output transformer, I measured the actual clearances between the traces. They did conform to the MEC (minimum electrical clearance), .125" in this case, but, evidence of arching was present. http://mtsforum.grailtone.com/viewtopic.php?t=12785&highlight=lots+pictures+rm50+repair MEC are for an ideal situation, but, if there is any contamination, high humidity, near salt water, etc. a larger clearance is necessary. Since you're going to send it to Rob, who will do an excellent job, just ship the amp and it'll be taken care of. [/QUOTE]
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Modular Amps
Egnater / Randall Modular Amps
RM50 problem
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