Not Sure Where to Put this: But I need knobs!!

[Ben Coffin]

So I'm in the final process of building an all tube amp for my school engineering project (pics will be coming fear not) But I bought pots with a 8mm smooth bushing. I can't seem to find knows that fit anywhere, and I ordered some Marshall knobs but they fit 6mm not 8. Can anyone help me out?

Dome or bell shaped knobs are preferable, as are set screws, and in gold or black, the chassis of the amp is gold, and it has a brown western tolex with beige fender tweed. Any help would be awesome!!

[rob4001va]

maybe here?
http://www.fliptops.net/

or allparts?
or basspartsresource?

though the last two are prolly more instrument-related. Certainly bassparts is.

[Ben Coffin]

Only problem is I can't tell what size they fit. The pots aren't knurled or D shaft, so most of those wouldn't really work... I want to find something that blatantly says 8mm

[cliffbass1]

look for knobs that has a set screw like this

http://www.allparts.com/Chrome-Abalo...k-3182-010.htm

[B-string]

www.tubesandmore.com or www.mojotone.com ask them what size shaft they support. I think the Marshall gold tops are 8mm but not possitive?

[calebbarton]

www.boxofknobs.com

lol ok thats just too funny.

[rbonner]

When did standard off the shelf 1/4" pots go out of style? Did I sleep through a decade or something?

BOB

[B-string]

Originally Posted by rbonner

When did standard off the shelf 1/4" pots go out of style? Did I sleep through a decade or something?

BOB

Wondering the same Bob.......Had to look real hard to find larger shafts............don't go there................

[johnk_10]

what kind of pots did you buy that have an 8mm shaft? i've never seen any that big?

[msquared]

http://www.thgknobs.com/

[Ben Coffin]

Yeah buying the 8mm shaft was not my best idea, they're Alpha pots from Tube Depot. I got those because I was making one big order from the site and I couldn't get all the pots I needed in other bushing sizes.

And Marshall Knobs are 6mm, or at least the ones I bought were.

[BassmanPaul]

Originally Posted by johnk_10

what kind of pots did you buy that have an 8mm shaft? i've never seen any that big?

The same for me. 1/4" and 6mm is all I know of.

Depending on the actual size of the bushing in the knob you choose, you may be able to drill out the knob and still retain enough metal for the set screw to hold.

Otherwise take out the oddball pots and replace them with standards.

Paul

[Ben Coffin]

Yeah, given that the project is due next monday, I probably won't be ordering new pots. If they make pots with 8mm bushing, then some has to sell a knob that'll fit!! That would make sense to me lol.

[Passinwind]

Originally Posted by 12FootTroutBass

Yeah, given that the project is due next monday, I probably won't be ordering new pots. If they make pots with 8mm bushing, then some has to sell a knob that'll fit!! That would make sense to me lol.

If the bushing is 8 mm the shaft itself is probably 6 or maybe 6.3. Have you actually measured it though?

[T-Bird]

Hi.

I've never seen 8mm shaft potentiometers for sale anywhere either, but I've seen them in old heavy duty el. equipment and automation machinery. Not the kind to use in amps though .

Got a pic?

Regards
Sam

[Ben Coffin]

Originally Posted by T-Bird

Hi.

I've never seen 8mm shaft potentiometers for sale anywhere either, but I've seen them in old heavy duty el. equipment and automation machinery. Not the kind to use in amps though .

Got a pic?

Regards
Sam

So I would just like to preface this with I may be the dumbest poster on TalkBass, and if moderators decide to delete me for sheer stupidity, I will not be offended.

Turns out the bushing of the pots are 8mm, but the shaft size is 1/4". I feel incredibly dumb. New knobs are one their way...

[LoveThatBass]

So you made a mistake. Anyone else who hasn't hold up your hand.
I predict no takers so you are in good company. Live and Learn...the way of life!
Glad you figured it out.