Capacitor spec's, choosing replacements...

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Ralph Mowery wrote:

Sounds like transistor type circuitry using that high value caps. Vacuum tube circuitry does not have caps. with that high value. Looks like direct coupled OTL amp. section.
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You have stated that "Vacuum tube circuit" does not have or use capacitors, that is far from being truth and specially in High power Amps. RF or the audio. As I said before Capacitors are use for passing signal through and are use in DC circuit to filter AC out it all depend what application is use for. in filtering Capacity is usually Large in coupling signal usually small or smaller. DC filter circuit Voltage can be in Thousands and Capacity up to Hundred uf. However most common around 10 uf. if chock is use between. Higher Value is hard to find and become Very expansive .
"Tony Hwang" wrote in message

Sounds like transistor type circuitry using that high value caps. Vacuum tube circuitry does not have caps. with that high value. Looks like direct coupled OTL amp. section.
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"tony944" wrote in message

Sounds like transistor type circuitry using that high value caps. Vacuum tube circuitry does not have caps. with that high value. Looks like direct coupled OTL amp. section.
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tony944 wrote:

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That's why I suggested reversed polarity. If it had been in a filter circuit, then a reversed capacitor would most likely have generated a fair amount of heat as it shorted, with 4th of July sounds very frequently accompanying the short.
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On 06/30/2015 9:26 PM, snipped-for-privacy@sbcglobal.net wrote:

Neither of which happened...actually it appears they essentially opened entirely to pass virtually no current. The amp was/is still functional in all operating modes; there was simply no output above a most minimal that was totally unaffected by volume controls, etc., ...
If they'd been reversed polarity, I'm certain they'd've gone poof! in a heartbeat; this failure occurred after a few months after the replacement....
--


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