Millenium 2 for shunting input/output to ground (R.G.)

[nordine]

hi all

since i'm having trouble with squealing with a high gain device -in bypass mode- using millenium 2 switching, i did a search and this is what i got:

http://www.diystompboxes.com/smfforum/index.php?topic=714.0

R.G.: "You use the Millenium switching to kill the gain of the effect either at the input or inside the effect circuit.

A reasonable way to do this is with an ordinary NPN silicon transistor hooked up at a 0Vdc point shunting signal to ground. The input works fine for this."


however i still can't comprehend how to put that NPN there

anyone has an idea on how to put up this? R.G.?

thanks

[Mike Burgundy]

quickie answer to this: an NPN is on with base high, off with base low, right?
at a 0V offset point somwhere at the input side of the circuit (there is NO DC offset, jus AC signal) insert the tranny between signal and ground, c=signal line, b=control, e=ground.  We need the thing to be on when the pedal is off (mute!), so when the pedal is OFF we want a point that is HIGH for control. The Mil switching uses a MOSfet inline with an LED and limiting resistor. take the R and  LED as one half of the chain, and the MOSFET as the other. The point in between alternates between high (9V) for pedal OFF (no LED lighting) and for all intents and purposes 0V for pedal ON (LED lights) right?
That's exactly what you want to control your muing resistor - have the tranny at high resistance for pedal ON, and low resistance for mute-mode
hih

[nordine]

heh it's so clear now

i don't have the breadboard at hand right now, but i'll tell how it went

i really appreciate your help, man, a lot

thanks!

[DDD]

1/2 OFFTOP:
Millenium bypass IMO is a great masterpiece: simple, elegant and ingenious schematic.