Shunt pot volume control

[fault151]

Has anyone tried using the shunt pot idea to tweak your alps pot?

Heres the link to explain how it works. It is meant to be a good improvement on your your existing volume control and a quite noticable change too!

World Designs- Shunt Pot Modification

 

[nikongod]

nope.

the commonly used alps pots are already audio taper. no fancy bandages necessary here.

 

[Pars]

This is different than the law-faking that is seen using a resistor and a linear pot to fake a log pot curve (such as Tangent ran some measurements on).

I haven't tried this (the shunt pot mod) however...

 

[nikongod]

Quote:

Originally Posted by Pars /img/forum/go_quote.gif This is different than the law-faking that is seen using a resistor and a linear pot to fake a log pot curve (such as Tangent ran some measurements on).

POO

you are correct, i spoke WAY too quickly.

i have tried that with an audio pot for balanced operation. it is quite nice.

i do not to hold SPL contests with Ray samuels and markl so i never minded the loss of a few db.

 

[fault151]

So have you tried the shunt pot concept on anything? I have never tried it and wondered if its worth doing?

 

[nikongod]

Quote:

Originally Posted by fault151 /img/forum/go_quote.gif So have you tried the shunt pot concept on anything? I have never tried it and wondered if its worth doing?

the one in the link, yes although in the balanced configuration.

i like it quite a bit. it allows you to control a balanced signal with one deck of the pot, so a standard stereo pot can be used.

 

[Pars]

Quote:

Originally Posted by nikongod /img/forum/go_quote.gif it allows you to control a balanced signal with one deck of the pot

??? How? The diagram still uses 1 deck per channel?

 

[dsavitsk]

 

[nikongod]

Quote:

Originally Posted by Pars /img/forum/go_quote.gif ??? How? The diagram still uses 1 deck per channel?

im no good with the photo software...

use 2 resistors each 1/2 the recommended value. one on each "end" of the pot.

 

[fault151]

I might give it a try then.

 

[nikongod]

In an effort to "quickly and dirtily" make my 708B amp listenable with parts on hand between parts orders I rigged this up. The standard shunt pot (with the resistor in parallel with the pot between the wiper and ground) is still a pile of ****.

I do not have a spare 50 or 100K-ohm pot, so i used an old 10K, which is sweet bacause it gives the option for the extra attenuation.

The circuit in discussion in this thread works much better when you use the combination "10K-pot&47.5K ohm resistor" than the combination "10K-pot& 47.5 ohm resistor."

 

[darkfury18]

Wow.. I was thinking of doing something like this, but wasn't really sure how to approach it. Thanks for the link, I'll definitely be using this in my next project.