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Audio and Video Talk
Valves / Vacuum Tubes
testing tube voltage in circuit
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<blockquote data-quote="1200GXman" data-source="post: 1025998" data-attributes="member: 17884"><p>Hi all</p><p>Amplifier in question is Pioneer SX410</p><p>It still has original coupling capacitors. Capacitors at power supply have been replaced by a technician and 1 or 2 others. It had a hum and one channel was distorting and fuzzy sounding.</p><p>I don't know if full tests were done but his view is if the original caps are still fine, leave them alone. I am a little worried about the coupling caps due to age.</p><p>The amp still sounds fine without issues but as you know, the worry.</p><p>Is there maybe steps I can use with a volt meter and with the amplifier switched on to test the tube socket pins and see that voltages supplied are correct?</p><p>I know it is very high voltage but I have a steady hand and will be careful.</p></blockquote><p></p>
[QUOTE="1200GXman, post: 1025998, member: 17884"] Hi all Amplifier in question is Pioneer SX410 It still has original coupling capacitors. Capacitors at power supply have been replaced by a technician and 1 or 2 others. It had a hum and one channel was distorting and fuzzy sounding. I don't know if full tests were done but his view is if the original caps are still fine, leave them alone. I am a little worried about the coupling caps due to age. The amp still sounds fine without issues but as you know, the worry. Is there maybe steps I can use with a volt meter and with the amplifier switched on to test the tube socket pins and see that voltages supplied are correct? I know it is very high voltage but I have a steady hand and will be careful. [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
testing tube voltage in circuit
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