Just came across these little adapter sleeves thought I'd pass it along as a construction tip. (I have no affiliation with the seller). I'm usually in the tubes forum. These allow you to fit 6.35mm knobs onto 6mm pots or rotary switches. If you've ever put a 1/4 inch knob onto a 6mm shaft you soon lean that the knob rotates "crooked", because it goes off center even though the grub screw is holding it tight, it is pushed off center. And it looks and feels like crap. Also there are many, many more 1/4 inch knobs to choose from in the vast knob marketplace than 6mm knobs. Most 6mm knobs are ugly Chinese crap. Swap meets, ham-fests, flea markets, etc. are just full of people selling great looking bakelite 1/4 inch knobs. And old companies like Davies Molding are still making those great looking ham radio 1/4 inch knobs from 1930's molds!
I'm going to order a bag of these now, they seem to be just what I needed. Thought it might help others solve this problem. Also I've tried building up 6mm knobs using aluminum tape, that is also a disaster as the tape compresses, knobs loosen and you cant get the exact diameter, and the knob is still off center.
Brass Pot Adapters – 6mm to 6.35mm (x20) – Thonk – DIY Synthesizer Kits & Components
I'm going to order a bag of these now, they seem to be just what I needed. Thought it might help others solve this problem. Also I've tried building up 6mm knobs using aluminum tape, that is also a disaster as the tape compresses, knobs loosen and you cant get the exact diameter, and the knob is still off center.
Brass Pot Adapters – 6mm to 6.35mm (x20) – Thonk – DIY Synthesizer Kits & Components
Rumor has it that you can make your own from 1/4" brass tubing commonly found in hardware stores in the USA. I've not tried this though.
I have used ones from Allparts, and they work OK. The inner diameter is perhaps a tiny bit generous, at least on the samples I've had. Antique Audio Supply also sells them.
I have used ones from Allparts, and they work OK. The inner diameter is perhaps a tiny bit generous, at least on the samples I've had. Antique Audio Supply also sells them.
I’ve just ordered 200mm of some 1/4 inch OD brass tube to prove that theory for £3.30
I don’t have the problem mostly cos the switches I use come in both 6.35mm and 6mm , but I’ll give it a try
If only they'd have properly standardized this, you get splined/non-splined, flatted/circular, 6mm v. 1/4", etc etc....
I wonder what NASA use?
I wonder what NASA use?