500k Reverse Log Pot + Phase 90

[Zben3129]

Hi guys,

I was wondering how I could make a 500k rev-log pot for the phase 90. I read secret life and lots of other topics here, but I just want to know in plain text what I need to do. I have   1k through 1m linear pots in the normal values.

Thanks

Zach

[solderman]

HI
I have tried the stuff you have read with not that good results. Instead I use a norman log, or audio as it also is non as, and wired it backwards in lots of my builds. The only drawback is that you have to dial it in backwords.

//solderman

[bluesdevil]

HI
I have tried the stuff you have read with not that good results. Instead I use a norman log, or audio as it also is non as, and wired it backwards in lots of my builds. The only drawback is that you have to dial it in backwords.

//solderman

That's what I did for my Phase 90 build and it worked out fine.

[zyxwyvu]

Hi guys,

I was wondering how I could make a 500k rev-log pot for the phase 90. I read secret life and lots of other topics here, but I just want to know in plain text what I need to do. I have   1k through 1m linear pots in the normal values.

Thanks

Zach

Probably the best you can do is to parallel a 1M pot and a 1M resistor. This will give you a 500k pot with close to a rev-log taper.

There are two ways you can connect them. The first is to connect the resistor across two lugs of the pot, and connect those same ones to the circuit. The second is to connect the resistor across the outer lugs of the pot, and then connect one outside, and the middle lug of the pot to the circuit.

Check out this thread for some more detailed info: http://www.diystompboxes.com/smfforum/index.php?topic=70732.0 (circuits D and E in the pictures are the relevant ones)