Soundcraft UI12 Vol Pot

[Davebassman]

Hi,

I need to replace one of the Main Mix potentiometer ( encoders? ) because they don't respond correctly and the touch it's to hard compared to the others. Anybody can help me to indentify this pot?



Thanks.

[Greg Robinson]

Looks like an Alps Alpine RK12 series dual 10k audio pot. You'll have to confirm dimensions with the datasheet.

[Davebassman]

Looks like an Alps Alpine RK12 series dual 10k audio pot. You'll have to confirm dimensions with the datasheet.

Wow, amazing! it's a 103C = 10KC pot not a encoder!

Thanks a lot.

[J M Fahey]

Take care of getting a "C" curve pot, which is the opposite of an Audio (A) one.

[Greg Robinson]

I believe in this case the code AE103c, the first digit refers to A=audio taper, as that would make most sense for a conventional level control. If it were a mic gain control reverse taper would make more sense.
I think here the trailing c references the vertical format of the pot, but who knows without knowing who the actual OEM is and having the correct datasheet - I think this is a generic clone of the Alps Alpine style I linked above.
Make sure to measure the existing pot to confirm either way.

[Davebassman]

Yes, I think it's a A pot, it's from main out control. And Alps doesn't have any C pot in the datasheet,

[J M Fahey]

Maybe.
Easy to check, set it to 5 and measure both halves, from 0 to wiper and from wiper to 10.

Linear will be 5k - 5k
Audio will be (roughly) 1k - 10k
C/antilog will be 10k - 1k

C/antilog/reverse_Audio curve is not common in the Guitar or Hi Fi world but quite common in mixers as an input stage Gain control which I suspect here (hint: it IS a mixer)

Also used as Distortion/Gain control in MXR pedals and in a few Fender SS Guitar amps.

But in any case measuring rules