This is a 1U panel for four passive devices: 1 potentiometer
(Resistor), 1 Capacitor (1 of 11 values, selected by a rotary switch), 1
Vactrol, and 1 Diode. Note that all three terminals of the pot are
available, with the BOTTOM terminal normalized to ground. This allows
it to be used as a 2-terminal rheostat, as for example in a low-pass
filter configuration with the capacitor. (Signal into Wiper, with
Bottom tied to one end of Capacitor through a multiple which provides
the output.) Both ends of Capacitor are normally connected to ground.
Each of the four devices can be used independently. And they can be
patched together to make various high and low-pass filters. The Vactrol
provides a voltage-controlled resistor. (I am thinking to add a 470 ohm
series resistor to the Vactrol LED to limit current.) I had room for
two more jacks, so I included a Diode.
I think I will make one of these and try it out. Unfortunately the FPD
panel costs $60 US!
-Richard Brewster
http://www.pugix.comModularSynthPanels@yahoogroups.com wrote:
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> Description : 1U with passive pot, capacitor, vactrol and diode
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