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Old 20th June 2002, 12:58 PM   #1
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Question Source Follower Enlightenment


Would it be OK to use a incandecent light bulb (as in the Zenlightenment amplifier) as a CCS in a source follower configuration? Would it negatively impact the sound? I'm thinking this would be a good way to get around some of the large heatsinking requirements of a Class-A setup.

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Old 20th June 2002, 01:44 PM   #2
nar is offline nar
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Should be no problem as long as the voltage drop across the bulb is high enough to simulate a real CCS.

Some people here in the forum say that a resistor load always sound better than a real constant current source...

...but in all Alephs the current sources are there,so ...

I'm perplex.What does Nelson state for this crucial point?...
"... Audio needs the thinnest wire ..." Rowan McCombe ... I hear it !!!
"Just 'cause they can't hear or sense it themselves doesn't mean you can't !" Allen Wright Allen was right ...
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Old 20th June 2002, 06:35 PM   #3
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The bulbs work just great. Their impedances are fairly
high compared to speakers, and so they don't really
load down the output much at all. See the article for
the appropriate kinds of values and voltages.
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Old 20th June 2002, 09:58 PM   #4
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Will do!

Thanks nar and Mr. Pass.

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