Potentiometer search

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Struggle
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Potentiometer search

Post by Struggle » Fri Sep 11, 2020 6:39 pm

Hi, I’m trying to find a replacement pot and don’t really know where to start. Wondering if anyone can point me in the right direction by looking at the attached image. Any help would be appreciated!
6FCEF3D7-458B-41B2-8920-6233338B49AE.jpeg
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DMR
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Re: Potentiometer search

Post by DMR » Fri Sep 11, 2020 6:51 pm

The "A1M" means it has a value of 1 megaohm, with an "A" taper (logarithmic aka audio taper). The shaft shape is "D-Shaft". You could measure the length of the shaft, and get a better look at the footprint of the part connecting to the PCB, and look on mouser.com or digikey.com for something with the same parameters. I'm not sure what product this is, but it might be easier to try to email the manufacturer and ask for the part #.

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Re: Potentiometer search

Post by Struggle » Fri Sep 11, 2020 9:39 pm

DMR wrote:
Fri Sep 11, 2020 6:51 pm
The "A1M" means it has a value of 1 megaohm, with an "A" taper (logarithmic aka audio taper). The shaft shape is "D-Shaft". You could measure the length of the shaft, and get a better look at the footprint of the part connecting to the PCB, and look on mouser.com or digikey.com for something with the same parameters. I'm not sure what product this is, but it might be easier to try to email the manufacturer and ask for the part #.
Thanks!! This is a Acidlab Miami drum machine. I’ve sent a few emails and haven’t heard back, but I’ve been searching around and found out that the pots used one these were made by Panasonic and have been discontinued so not sure if a part # will help or not. I’ll take a look around mouser and digikey.

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Re: Potentiometer search

Post by guest » Fri Sep 11, 2020 9:52 pm

the black body ones are panasonic, but i dont think the green body ones are. can you post a picture from the other side? they look like 12mm duals. thats a common size, so a number of manufacturers make something that might work.
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Re: Potentiometer search

Post by Flounderguts » Fri Sep 11, 2020 10:42 pm

See the little nubs that are diagonal? Really looks like an Alpha 3RP 11mm series to me. They would be *almost* 12 mm across, but the Alpha 12mm series have metal bodies.

Lots of "alpha style" pots out there, but most knockoffs don't use the dot-matrix pot value label. Also beware of alpha style pots with rivets...

I think Bourns makes 11mm series pots with the same footprint. The Alpha website should have a datasheet you can match it up with.
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Re: Potentiometer search

Post by Struggle » Fri Sep 11, 2020 10:43 pm

guest wrote:
Fri Sep 11, 2020 9:52 pm
the black body ones are panasonic, but i dont think the green body ones are. can you post a picture from the other side? they look like 12mm duals. thats a common size, so a number of manufacturers make something that might work.
B1D7830D-1F0B-47C4-8975-6E0CCB832817.jpeg
Thanks!! Maybe this one? https://www.mouser.com/ProductDetail/A ... 8egg%3D%3D
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Re: Potentiometer search

Post by Flounderguts » Fri Sep 11, 2020 10:52 pm

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Re: Potentiometer search

Post by Struggle » Fri Sep 11, 2020 10:59 pm

Flounderguts wrote:
Fri Sep 11, 2020 10:52 pm
Alpha 3RP/1115G

http://www.alphapotentiometers.net/html/11mm_pot_9.html
That looks right. Thanks!

Found this at willxyz too..
https://willzyx.com/x0xb0x-parts/16-alp ... meter.html

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Re: Potentiometer search

Post by Flounderguts » Fri Sep 11, 2020 11:05 pm

That's the one. Good price, too. Nice job!
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Re: Potentiometer search

Post by KSS » Sat Sep 12, 2020 5:26 am

A does not always mean Audio! Sometimes it means linear. And then B is audio. Don't assume.
Treat utility modules as stars instead of backup singers.

Treat power supplies like Rockstars instead of roadies!

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Re: Potentiometer search

Post by Struggle » Sat Sep 12, 2020 9:58 am

I appreciate the helpful guidance and I know a lot more about pots now! I wish I had asked here sooner. Thanks all!

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Re: Potentiometer search

Post by DMR » Sat Sep 12, 2020 5:57 pm

KSS wrote:
Sat Sep 12, 2020 5:26 am
A does not always mean Audio! Sometimes it means linear. And then B is audio. Don't assume.
Ah my mistake, I had always experienced A as audio and B as linear, so I thought this was standardized. I assume then the only way to know for sure is to look at the data sheet of the pot once identified, or do a rough measurement of the pot taper using a multimeter?

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Re: Potentiometer search

Post by guest » Sat Sep 12, 2020 6:19 pm

are there particular brands that do this? im not sure ive come across it before.
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Re: Potentiometer search

Post by KSS » Sat Sep 12, 2020 11:32 pm

@guest
if your question is aimed at me, I haven't really tried to define which brands because that's just another path to making assumptions. I've run into it enough over the years to instead ALWAYS check. There have even been brands which changed due to aquisistion or being aquired.
Treat utility modules as stars instead of backup singers.

Treat power supplies like Rockstars instead of roadies!

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