Extension shafts for amp knobs

[Stamp]

I am in the middle of building a valve amp and need some shafts with connectors and bushes to allow me to put the knob further from the chassis.
I have found about 2 and can't think what to search for.
Any ideas?

[theaxe]

Maplin?

[Morningside]

What about the word Spindle? or potentiometer/Pot? Extender, brass.
Edit:Sorry, came across a bit abrupt!

Have a look about here

Annoying thing is, I know exactly what you mean. Just cannot find them.

Edited by Morningside on Sunday 21st December 17:07

[Simpo Two]

Hmm.

They made them in 1955 if that's any help:

www.radiomuseum.org/forum/bush_dac90a_dac_90_a_vol...



Failing that, what about a DIY solution with an extra length of rod, sleeve and glue?

Edited by Simpo Two on Sunday 21st December 17:26

[Redline Chaser]

Surely with an ample knob, you wouldn't need an extension shaft?

I'm so very sorry.

[Parrot of Doom]

All you need is a slim tube and a couple of grub screws, one at either end - like a metal drinking straw. Bear in mind that the shaft should be secured at each end - the longer the shaft, the more torque you can apply to the pot, and the more damage you can do.

BTW which kits are they? I have two Velleman amps and they're very nice

Edited by Parrot of Doom on Sunday 21st December 17:37

[shalmaneser]

Redline Chaser said:

Surely with an ample knob, you wouldn't need an extension shaft?

I'm so very sorry.

Thanks for that - standards are slipping, that was what, 20 minutes?

Personally, I've never felt the need to extend my knob with a shaft, but that's just me - must be good genes.

[Simpo Two]

Parrot of Doom said:

the longer the shaft, the more torque you can apply

I've often thought that when using a long screwdriver - but the mechanical advantage is the same regardless of shaft length, no?

[Parrot of Doom]

I meant in terms of moving it the wrong way - against the plane of rotation. Like if you're removing wheel bolts from your car, but instead of rotating them, you grab the handle of the wrench and pull it toward you.

Edited by Parrot of Doom on Sunday 21st December 19:16

[The Moose]

What pot have you got and how long do you need the shaft??

PM me your details.

Cheers

The Moose

[Stamp]

Parrot of Doom said:

All you need is a slim tube and a couple of grub screws, one at either end - like a metal drinking straw. Bear in mind that the shaft should be secured at each end - the longer the shaft, the more torque you can apply to the pot, and the more damage you can do.

BTW which kits are they? I have two Velleman amps and they're very nice

Edited by Parrot of Doom on Sunday 21st December 17:37

It is going in a solid Walnut cabinet, with a celestion 12" speaker.
I don't want the pots too far from the chassis and need to extend the shaft by 3 ish inches.
It is a CLASS A 6V6 HEAD. VALVE TUBE AMPLIFIER
True "CLASS A" Point to Point Symphony 6V6 Single ended Guitar Amplifier.

1 x 6X5(EZ35) Rectifier, 2 x 6SL7(Fender Tweed)Drivers, 1 x 6V6GT output Valve, chassis and pine head.

This amp has one channel with Volume, Treble, Middle, Bass controls and a choke.