reverse audio taper from audio taper?

[tempus]

Hey all;

I've been reading up on tapering pots at RG's The secret life of pots and was wondering if it was possible to make add a resistor that would make an audio taper pot wired as a variable resistor into a reverse audio taper variable resistor.

Any thoughts?

Thanks

[closetmonster.]

There was a discussion about this on FSB:

http://free stompboxes.org/viewtopic.php?f=42&t=8270

Not sure if that helps.

EDIT: Just remove the space

[guitarmageddon]

If you can live with it functioning backwards, just swap lugs 1 and 3 of an A type. That's the easy way.

[armdnrdy]

Hey all;

I've been reading up on tapering pots at RG's The secret life of pots and was wondering if it was possible to make add a resistor that would make an audio taper pot wired as a variable resistor into a reverse audio taper variable resistor.

Any thoughts?

Thanks

You will find the answer in R.G.s tutorial that you have been reading.
R.G. states:
"If we want to make a reverse log tapering pot, we're in! However, there is no way to get a simulation of a log taper pot in the two terminal connection. For that we have to buy real audio taper pots."

The "two terminal" connection is a variable resistor. This is the same as when you see the wiper (lug 2) connected to either lug one or lug 3.

[tempus]

Thanks for all the replies.

Armdnrdy: At least one of us is misreading RGs article. If you read the whole section, it goes like this:

In the two terminal connection, the resistance through the pot is what we're interested in, not the voltage divider ratio.

It turns out that the tapering trick works here, but only partially. If we want to make a reverse log tapering pot, we're in! However, there is no way to get a simulation of a log taper pot in the two terminal connection. For that we have to buy real audio taper pots.

Here's what you get if do the series resistor connection:

Underneath this is the graph that depicts reverse log tapers. I took from this that you can't make a log taper pot (but I think he means rheostat) with only 2 terminals, but that you can do a reverse taper (again, read rheostat).

Guitarmageddon: I had the pot wired the way you suggested for a while (i.e., "backwards") but found that there was still too much gain left in the last few degrees of rotation. I'm starting to wonder if I might not get better results with a linear pot and a tapering resistor than with either the regular or reverse log...

[armdnrdy]

Armdnrdy: At least one of us is misreading RGs article.

I stand corrected!
It was past midnight and obviously my brain went to sleep before my body did!   

But......I reiterate....You will find the answer in R.G.s tutorial that you have been reading. 

[deadastronaut]

interested in your findings on this..

i'll have a read up too when i get time..