joule la150mkII- preamp

Have you tried just pulling the knobs off? Maybe you're overthinking it.

I have not tried, was afraid of braking the knob.  maybe i am over thinking this.

I'd also say pull them straight out. Be careful cleaning them though because I think that they're just plated  had the LA100.

Also, maybe call Rich at signature sound. He's the guy that does my part of the repairs on those at this point. He'll know and likely be able to tell you what to use to clean them as well. 

To clean the knobs while on the unit, try a mild soap and water solution such as dishwashing liquid on a cloth. If this does not remove the "dirt", it is probably because some of the thin plating has worn off the knob from the oil on your fingers. Consider it "patina" and continue to enjoy the music.

Thank you so much guys, really appreciate all your help.

sy

Either 3% vinegar or h2o2. Apply then let soak a minute or so then clear with clean water/distilled or RO

yes , but to do that i need to remove the knobs and for some reason, they do not come off. . i am trying, but afraid i will break them

@syhilly0107 They are held on by 2 Allen drive set screws, 1/16" driver takes them loose.

DO NOT try to pull them off without loosening the screws!! You may find that the shaft of the control comes out with it. The balance control is nla and the volume control is fragile also (but replaceable.

i didnt see any holes for set screws. will check again 

thank you so much

i checked very carefully, there are no set screws on the knobs anywhere

@syhilly0107 Obviously Jud used different knobs over time. Before you do anything I'd call Rick at Signature Sound (he's one of our dealers) and see what he says. It really won't be worth it if you damage one of those controls!

i just spoke to him. thank you all for your help. for anyone who needs this, the only way to access the set screws is to remove the faceplate and the  4 plastic holders on the inside.. thank you all again..

Oh jeez...just clean them in situ.

thats the plan. thank you