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Optimum value for volume control?
Optimum value for volume control?
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Old 12th October 2007, 01:45 PM   #11
StoneT is offline StoneT  United Kingdom
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Location: Devon UK
both halves of the potentiometer go to ground
Sudden flash of understanding!

It's because C(miller) isn't a straightforward capacitance isn't it?!
The source provides current to charge Cag but the votage rise at the anode is multiplied by the gain. So for a gain of 20, it's as if a signal 20 times bigger is being applied from the other side of Cag (Hence C(miller) being Cag X gain). The resulting signal coming out of the grid will source and sink current through the lower leg of the attenuator.

Many thanks EC8010! You have brought me understanding and an answer to my original question.
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Old 12th October 2007, 01:49 PM   #12
EC8010 is offline EC8010  United Kingdom
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Glad to have helped. You've "got it".
The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...
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Old 12th October 2007, 02:53 PM   #13
AndrewT is offline AndrewT  Scotland
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Location: Scottish Borders
Originally posted by StoneT
......The D500SE is a CD player...................Anyone have any idea what kind of impedance CD players like to see as their load? I guess that should have been my first question really
post 3 &5 tell you to measure it and give us the readings.
We can work out whether it's happy with 2k or 10k from those measurements. Or if we need a couple more load readings.
regards Andrew T.
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