[sdiy] New System Solution Diagram - Analog Music Synthesizer

[Ian Fritz]

At 10:54 PM 7/6/2004, harrybissell wrote:
>double muah-ha-ha
>
>they list LM394 "Supermatch Pair" in "white noise sources...
>
>I guess you use it for an ultra low noise amplifier so you don't corrupt the
>spectrum of your reverse biased NOS 2N2712 (selected, of course...)

Harry --

Fighting words!  I totally disagree with you.  What is important in a noise 
transistor is lack of 1/f noise.  I once selected through a batch of 50 
2N3904's to find the flatest spectrum.  The weakest signal one was the 
best.  I made the mistake of  paying for a 2N2712, and it is terrible.  A 
strong output, but a horrid spectrum.  I never thought of trying a 
supertransistor, but I should have.

   Ian