Any way to solve volume jump when switching out clipping diodes?

Started by trjones1, April 23, 2009, 12:10:40 AM

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trjones1

I love the sound of lots of distortion circuits when you can switch the clipping diodes on and off.  The only problem is that when you switch the diodes out of the circuit the volume jumps and blows my ears out.  Is there any simple and/or elegant way to solve this?  The best thing I came up with was using a dual gang volume pot and using one side of a dpdt to switch the diodes in and out and the other side to switch between using only one of the gangs on the volume pot and using them both in parallel.  This would halve the total resistance of the pot, but I doubt that would be enough to make much difference.  And I haven't figured out if the switching would work either.  Any ideas?

cpm

you can use a dpdt swich, one side for diodes, and the other to add a resistor in series with the volume pot, so when didoes ar off the resistor is in, therefore attenuating output.

to wire that resistor put it in series with volume and use the switch to bypass it for more volume. Also substitute with a trimmer to dial the convenient amount of attenuation.

balance

Similar to what Carlos says, you can use a dpdt switch with one half for the diodes and the other half switching in a dropping resistor from the effect output to ground. You'll have to experiment with the value though. I just tried this in a modified Trotsky using a 4.7K with decent results.