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Modular Amps
Egnater / Randall Modular Amps
Shorted tubes hurt my baby. Can anyone help?
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<blockquote data-quote="kc2eeb" data-source="post: 78880" data-attributes="member: 811"><p>Well, to tell a story;</p><p> I just ordered a new power amp circuit board for my RM50.</p><p>It seems the plate connection to the pc board(blue wire) shorted to the board and</p><p>toasted it. I had had a very intermittant noise that sounded like high voltage arching that I could never trace down. Never blew a fuse, and then, disappeared. I did find an missed solder joint on on of the screen grid resistors that I fixed and a loose ground on the DC heater supply.</p><p>Finally, this past Saturday, it arched enough to blow the mains fuse.</p><p>It ate up about a 1/4 inch square of the copper ground plane.</p><p>I'll try to post pictures of the repair as I do it.</p></blockquote><p></p>
[QUOTE="kc2eeb, post: 78880, member: 811"] Well, to tell a story; I just ordered a new power amp circuit board for my RM50. It seems the plate connection to the pc board(blue wire) shorted to the board and toasted it. I had had a very intermittant noise that sounded like high voltage arching that I could never trace down. Never blew a fuse, and then, disappeared. I did find an missed solder joint on on of the screen grid resistors that I fixed and a loose ground on the DC heater supply. Finally, this past Saturday, it arched enough to blow the mains fuse. It ate up about a 1/4 inch square of the copper ground plane. I'll try to post pictures of the repair as I do it. [/QUOTE]
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Modular Amps
Egnater / Randall Modular Amps
Shorted tubes hurt my baby. Can anyone help?
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