Counterpoint SA-3000 Preamplifer

My preamplifier now has a his that I don't know where it's coming from. Does anyone know what might cause this issue.
Also does the tubes need to be biased? if so, does anyone know how to do it?

Thanks

chan-audio07-04-2021 12:41am

4 responses Add your response

johnsonwu Details Discussions Posts This discussion Message User 469 posts 07-28-2021 at 01:05am Copy Comment URL Report Comment Edit Delete The SA3000 has a single tube line stage. Each triode in that tube is cathode-driven with a JFET input stage and the plate goes to an ancient old OpAmp as buffer. The phono is also rather similar. I would not spend much on it.
chan-audio OP Details Discussions Posts This discussion Message User 1 posts 07-04-2021 at 09:39pm Copy Comment URL Report Comment Edit Delete Thank you all for your suggestions. I've hired a electronics' repair company to evaluate my SA-3000. I'll let you know of his findings.
arcticdeth Details Discussions Posts This discussion Message User 1,572 posts 07-04-2021 at 01:11am Copy Comment URL Report Comment Edit Delete Counterpoint has a great reputation. Amazing gear. Get her upgraded, , replace caps / tubes. Enjoy another 20 years! great stuff!
teo_audio Details Discussions Posts This discussion Message User 2,197 posts 07-04-2021 at 12:53am Copy Comment URL Report Comment Edit Delete if it is in both channels, it is power supply related... if it is in one channel it’s a tube, resistor, or capacitor.

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