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In Reply to: Troubling comment from Mike Sanders (Quicksilver Audio) posted by audiophile121 on August 31, 2005 at 11:52:56:
A properly designed PC board using modern materials has absolutely no life time issue.
Follow Ups:
I also do not believe a hard wired amp will sound better than a well engineered PC board with adequate copper traces.
a cathode resister blows. I've seen a lot of PCB damage by resisters going and not on just amps either. An acquaintance just got told that his LS-5 could not be repaired by the factory because of PCB damage. This also holds for solid state too, as I've seen pcb's literally go up in a ball of smoke and fire with gaping holes in the board.
A friend has a Sonic Frontiers D/A converter with tube outputs.
One of the resistors shorted out recently and burned through the PCB.
I tried to repair it but couldn't. Quick call to Sonic Frontiers (or whoever is supposed to take over the maintenance) revealed that the board is no longer available.
I have repaired many pieces of "modern" tube equipment using PCBs and in many cases, the only option is to etch a new board.
On the other hand, vintage equipment hardly ever need to be repaired, and when they do, it is a piece of cake. I am working on a pair of original condition Telefunken V69 at the moment, and the workmanship has to be seen to be believed.
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