A very good afternoon to you MIKE

On 04 Jan 03 00:02 you wrote something about *I/F*...

 TK>> with 5 NPN transistors on board....i was amazed it worked
 TK>> at all....but it did :-)

 MR> For simple on/off control okay but not for continuously variable...?

Exactly....only "mute"...but that is so strange...there is no
form of powersupply connected to the collector at all...and yet it works
:-)

 MR> Sure, I've seen bipolar transistors used as muting switches too.

And that is all that is needed....if it is switched 500000 times from
bypass to mute and back with a on/off ratio of 25% then, after filtering, 
the resulting volume must be approximately at 25%....PWM volume control. 
:-)

Greetingzetcetera, Thom


... Leuk zeg, multitasken onder WINDOWS is net russische roulette.
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