HCP pot: off-the-shelf Spin-A-Split w selectable target coils

[Jack_TriPpEr]

Hey,

I was getting ready to wire up my own DIY Spin-A-Split when i came across this commercial, off-the-shelf product that has two added advantages: 1) you can choose which coils you are shunting to ground, and 2) you can alternately choose to apply high-pass filters to achieve a similar splitting effect with less 60 cycle hum noise.

https://pmtmusic.com/humbucker-control-pot

I cannot find anything that states what the value of the pot is, and what the taper is (audio or linear). My concern in these regards is that - based on my recent research here on the SD forums about members experiences wiring their own DIY Spin-A-Split controls - is that pot values higher than 100K make the effective band of the pot mechanical range very narrow so it is difficult to dial in, and audio taper exacerbates that further.

So, does anybody know the value and taper used in this HCP pot design? And for anybody that has used this HCP pot, what has your experience been good or bad?

 

[Bowtomecha]

Re: HCP pot: off-the-shelf Spin-A-Split w selectable target coils

I still think that using small trim pots or resistors is the better way to go. Fix it and stick it. Plus you can still use the tone control pot itself for something else.

 

[Jack_TriPpEr]

Re: HCP pot: off-the-shelf Spin-A-Split w selectable target coils

Hey,

I was getting ready to wire up my own DIY Spin-A-Split when i came across this commercial, off-the-shelf product that has two added advantages: 1) you can choose which coils you are shunting to ground, and 2) you can alternately choose to apply high-pass filters to achieve a similar splitting effect with less 60 cycle hum noise.

https://pmtmusic.com/humbucker-control-pot

I cannot find anything that states what the value of the pot is, and what the taper is (audio or linear). My concern in these regards is that - based on my recent research here on the SD forums about members experiences wiring their own DIY Spin-A-Split controls - is that pot values higher than 100K make the effective band of the pot mechanical range very narrow so it is difficult to dial in, and audio taper exacerbates that further.

So, does anybody know the value and taper used in this HCP pot design? And for anybody that has used this HCP pot, what has your experience been good or bad?

View attachment 99522

Update: got some very informative responses from Robert at PMT. It's a 500K audio taper pot, which leads to most of the split adjustment occuring within the 30%-50% portion of the pot's travel/rotation. He wrote that a <100K No Load pot would yield a larger portion of the pot's rotation affecting the split adjustment, but none of the pot manufacturers offer a <100K push-pull No Load, dual-gang pot.

 

[Jack_TriPpEr]

Re: HCP pot: off-the-shelf Spin-A-Split w selectable target coils

Bump. Would still like to hear from anybody that has used this product, regarding how well it works, etc.