Help Needed Identifying Pot

[adamg67]

I've got a Darkglass pedal with a nasty scratchy blend pot, as far as I can tell from a bit of searching it's not unheard of with their stuff (saw another Vintage Ultra v2 for sale on ebay with a scratchy master volume, which is the same pot). I tried contacting them but was completely ignored, which also seems like it's quite common if a pedal is out of warranty - I didn't expect it fixed, was just after help sourcing the right part. So I'm down to identifying it myself. It's a B100k opt but since it's on a PCB I really need to get something as close to exactly the same as possible. The pot is stamped "1849B104" bit that doesn't bring anything back with a Google search, or on RS, Farnell or Mouser.

It looks like this:

Code:

Anybody recognise that?

[PaulThePlug]

YH potentiometers... try google 1849b104 potentiometer pcb mounted and have a look at the images...

https://www.alibaba.com/showroom/pcb-mount-potentiometers-4.html

UK supplier may be more of an issue...

try bourns for a similar same pin out / dimension?

Edited April 2, 2021 by PaulThePlug

[adamg67]

15 minutes ago, PaulThePlug said:

YH potentiometers... try google 1849b104 potentiometer pcb mounted and have a look at the images...

https://www.alibaba.com/showroom/pcb-mount-potentiometers-4.html

UK supplier may be more of an issue...

try bourns for a similar same pin out / dimension?

I should have thought of looking at the images, I'm wondering / hoping if it's actually an Alps Alpine as they might be easier to get

https://uk.rs-online.com/web/p/potentiometers/7293505/

The metal top part looks the same as well. If not then yeah, the nearest Bourns is a good call.

[itu]

B = linear, and 104 = 10 x 10^4 ohm = 100 kohm.

1849 has to be the manufacturer's code, but may indicate time like: year 18, week 49.

Looks a lot like Alps, or Bourns, but it could be Alpha:

http://www.taiwanalpha.com/downloads?target=products&id=113

A guess of the type: RD901F-40E1-15K-B100K-00D

"single - bushing type - Knurled shaft - linear 100 kohm - with bracket"

I may be totally wrong, but this type could get you close. Like here is the shaft:

https://www.mouser.co.uk/ProductDetail/Alpha-Taiwan/RD901F-20-15F-B100K-00L1?qs=1mbolxNpo8cn%2BUYXjDefCw%3D%3D

...and here is the bracket:

https://www.mouser.co.uk/ProductDetail/Alpha-Taiwan/RD901F-40-15K-B100K-00DL1?qs=1mbolxNpo8eYt7%2B5UsjE2Q%3D%3D

Edited April 2, 2021 by itu

[adamg67]

After going through lots of Alps, Alpha and Bourns pots, I've grabbed a Bourns that is very similar, just with a plastic shaft, we'll see how that goes. 

[mybass]

Omeg is/was a UK firm where I once sourced pots from......Sussex way I think.

[TheGreek]

I was wondering how many posts there would be on this stuff...

[adamg67]

1 hour ago, TheGreek said:

I was wondering how many posts there would be on this stuff...

I'm amazed it took so long as well. Although, it's fair enough that everyone assumed I wouldn't need help with that.

[adamg67]

I got this done, and I'm pretty happy with how it's turned out, for my second ever go at repairing a pedal anyway - I know it's amateur hour compared to the stuff many people on here can do, but you have to start somewhere.

I wasn't happy with the Bourns pot I found so I looked again at alpha (I needed an alphas one anyway for another pedal) and found what looked like a close enough match at Thonk. Much easier to find the right one on their site than the big electronics places. The main difference is it's a D shaft not a knurled but it was easy enough to convert the knob to match. Other than that it was just a case of making sure the pot was held in position for soldering as it's sitting a bit higher than it naturally would, but with a bit of care that was easy enough.

End result, one £360 (new) pedal that now works perfectly again.