It seems that all of us code owners has the same problem with the master volume, it's a double potentiometer vertically soldered to the board. I've measured my master vol pot, both pot vipers seems to miss contact from time to time when you turn the knob. So thats means to me a broken potentiometer. The surface inside the pot where the viper travels is partly broken. I noticed that the pot does not have anything to do with any software or firmware, so no firmware update will help here. So my question is where to buy a new master volume potentiometer for marshall code 50. Best regards keep up the good work.
Hello there, I have not yet done anything with this pot problem, but what I remember it should be possible to drill a hole thrue the pcb there the pot axle should be, in other words I could use a double pot with a longer axle and then solder it with wires. I guess it should work. Have to connect it right ofcourse. I am going to try this some time in the future, not sure yet when. I hope this gives some idea of a possible solution.
I don´t remember the value of the double pot,
but it is easy to measure when soldered off the board,
'personally I would choose logaritmic potentiometer becourse
the volume wouldn´t jump up so fast in the beginning.
It is moore easely to adjust the volume.
I am glad if anything of this helps.
Hi Kaj. Thanks for the quick response. Yes, I intend to try and make some adaptation to accommodate a bigger pot, and I think that should work as well. Have you even measured the resistance values on the pot pins, and tried to find out if they are linear or logarithmic? My biggest doubt at this moment is to know the value of that pot, and to try at first to find an equal one or to exchange it for one with a bigger body. Please let me know if you have this information. Thank you so much again!
Hi Kaj, thanks again for the answer.
I just made a question here in the forum for Marshall Support, you can read it as you open the forum since it appears as featured.
Let's see if they give us a more specific answer this time. I'm a bit tired of the Marshall Support's same useless answers about this issue.
From design kind of view it looks like these ones
h t t p s //de.aliexpress.com/item/32805662302.html?gatewayAdapt=glo2deu
h t t p s //de.aliexpress.com/item/1005002035965125.html
Is the restistance printed on side?
Just search for the following words e.g. " RK12 potentiometer dual 23MM 6 pin" at ebay
But I don't know the correct values.