Cgs synth

>I have been wondering why no tube compressors use pentodes as VCA's
>or why I have never heard of a tube gate. Although it might be
>possible to design a tube VCA where the control voltage is inaudible
>using a pentode with a different configuration or with a tube with
>more than three grids, I do not think anyone has ever done it.

René Schmitz http://www.uni-bonn.de/~uzs159/ did a version which cancelled
out the CV by inverting the signal and feeding it through a second VCA,
re-inverting it and mixing it with the first, resuling in cancellation of
the control voltage.

>So if didn't use any diodes, and instead used two 2K or one 1K
>resistor, V/R = i, 15/1100 = .013mA, P=iV, .013*15 = .195W, would
>that work??

As long as the heater sees the same current, anything would be okay, so yes,
it would work.

_______________________________________________________________________
Ken Stone sasami@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>