In article , Nick Gorham
wrote:
Jim Lesurf wrote:
In article , Nick Gorham
wrote:



"The signal level was held constant at about 70 volts RMS at 600 Hz
across the capacitors. (for about 26mA signal current). This is
probably more than you would normally expect,..."

My reaction to the last phrase was,,, "indeed!" :-)

I can't recall ever building or using an audio amplifier or tuner that
had anything like this large an *audio voltage* across any of the
*capacitors*. Note the above is 70v RMS *between the capacitor
terminals*. i.e. not just an input where most of the voltage appears
elsewhere. I have certainly built (and use!) amps which have audio
voltages this large inside them, but not between the terminals of any
of the signal capacitors.


The fact you may not have built such a thing, doesn't mean they do not
exist.

I agree. Hence the question I asked at the end of the posting you have
quoted, but which you snipped. :-)


However from the discussion which followed I now think you misunderstood
what I was saying. Hence can we now take it that in practice we can
regard it as unlikely that any amplifiers *do* require their signal
capacitors to endure such large ac voltages?

Slainte,

Jim

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