Little Marshall MS2

[sweatyk]

Been searching to find the volume and tone pots for this little amp. Is there a direct replacement for these? A50K and B50K. I know it's a cheesy little throw away amp, but this is for a friend, and he has a sentimental attachment to this thing. Both pots are seized up so replacement is the only option. I tried to get the shafts freed up to turn but the pot metal housing broke on them. Thanks

[DrGonz78]

Need a picture of the pot to identify what it is.

[sweatyk]

Need a picture of the pot to identify what it is.

Here they are....been looking through Mouser trying to find a match or something close.

[Jon Snell]

You will not find those in Mouser or many of the main suppliers. Here is a selection of B type, others are available but you may have to cut the shaft down to the length you require.
https://www.ebay.co.uk/itm/282202446...Bk9SR4yN_NLlYA

[J M Fahey]

Choose from many ; https://www.ebay.co.uk/sch/i.html?_f...+pot&_osacat=0

sorry but that random listing is all but useless.
Like pretty girls answer me when I ask for their phone:"itīs in the phonebook".

We need original pot pictures, case measurements and shaft diameter to pick a compatible one.

Mini-knobs might have same split knurled shafts as other Marshall pots or not,check that.

[J M Fahey]

Here they are....been looking through Mouser trying to find a match or something close.

Those are the MOST common type available, generic "16 mm" case, probably 1/4" or 6 mm slotted knurled shaft, only shorter than average,maybe 1/4" long, measure diameter and length with your caliper.

Best if finding exact same ready made; if not, a few minutes being creative with a Dremel will make most any shaft fit those knobs.

[Helmholtz]

It might be obvious, but whenever you need to shorten a pot shaft, find a way to clamp the shaft and NOT the pot case.
Otherwise you might ruin the pot.

Again: Don't rely on clamping the pot case when cutting the shaft. Hold the shaft instead - or at least additionally.

[sweatyk]

Thanks guys!

[sweatyk]

This ought to get me where I need to be. The measurements are very close. May or may not have to trim anything.

P160KN-0QC15B50K BI Technologies / TT Electronics | Mouser

RV16AF-20-15K-A50K-3LA Alpha (Taiwan) | Mouser

[J M Fahey]

This ought to get me where I need to be. The measurements are very close. May or may not have to trim anything.

P160KN-0QC15B50K BI Technologies / TT Electronics | Mouser

RV16AF-20-15K-A50K-3LA Alpha (Taiwan) | Mouser

Basically yes.

Each of them offers an incredibly detailed datasheet, with tons of options, as to shaft - collar - leg orientation, PCB/wire legs, etc.
I would open each and check bit by bit which applies.

I guess you want short collar,short shaft, simply because itīs a *pocket* amplifier so every mm counts, but match what you measure to what datasheet shows.

meaning you might not have to touch anything.

Worst case, Dremel is your friend .