Boss HM-3 Modification/Repair

[Mark.]

So i suppose this doesnt classify as building your own stompbox but i wasnt sure where else to put this..

I accidently stood on my old Boss HM-3 pedal last night and snapped the distortion knob clean off, it snapped flush with the base of the pot so theres no way of using it now..

I had a look online but i cant seem to find these pots in production anymore, its a 503A 5 CV ALPS pot from what i can see.
Is there any way i can repair this using a different pot? I think il end up having to re house the pedal anyway so any pot would do, i would also need to change the foot switch to suit which makes me wonder if theres anything else i can change to improve the sound? It wasnt the greatest sounding pedal to begin with and its pretty much useless now anyway.

Ive got experience with electronics through being an automotive technician but this is a first for me..

Any help would be appreciated, i can provide high quality photos of the board if needed.
Thanks

[duck_arse]

here is a link to a 9mm, 50k log pot, does it look about the right size?

https://www.taydaelectronics.com/potentiometer-variable-resistors/rotary-potentiometer/logarithmic/50k-ohm-logarithmic-taper-potentiometer-round-knurled-plastic-shaft-pcb-9mm.html

we love to look at pictures around here, doesn't really matter if the subject is broken or not. post away.

welcome to the forum.

[Mark.]

Thanks for your response, that design is very similar, the pins are straight on mines as opposed to a right angle, mines also have a threaded metal shaft which is around 8mm.
Heres some images of the board for anyone interested, ive removed the broken pot already.

[yanng45]

Those appears to be similar to the alpha 9mm, like those : https://www.banzaimusic.com/Alpha-9mm-Full-Shaft-Standard/ ?

[Mark.]

Those ones look the same as whats on the board already, good to know i can get a direct replacement that will fit in the current pedal housing.
Thanks for your help 

Does anyone know if its worth changing or removing some resistors or capacitors whilst i wait on the new pot turning up?
Ive always thought that the distortion was too overpowering in the high end anyway so this could be a good chance to modify it since its apart.

[PRR]

> modify it since its apart.

Bad idea. If it's broke, fix it just as it was.

When you combine fixing and modding you quadruple the ways you can go wrong.

[Mark.]

> modify it since its apart.

Bad idea. If it's broke, fix it just as it was.

When you combine fixing and modding you quadruple the ways you can go wrong.

Turns out that was a wise idea, My new pot turned up today which i soldered in, but during this i had about 4-5 wires come loose as they were old and brittle, ended up replacing half the wires in the end but it was more hassle than i had hoped for.

Its all working again now so thanks for the input guys