开云体育

I got a bit frustrated finding a knob to fit the 6mm knobs on the uBitx.? Fortunately I found these adapter sleeves to bring the shaft OD up to 1/4 inch so I can use standard American 1/4 shaft knobs!??? I received them today and they work.? You do have to be careful to pull them out slightly before you tighten the set screws so the knob has enough clearance to be pushed in for the switch to work.

https://www.ebay.com/itm/222983860788

-Jonathan

Just use some hear shrink to increase the shaft dia..

I had some M3 Nylon Standoffs and drilled a hole through it so It just slid over the shaft.? I put a drop of super glue in from the end and rounded the corners with a dremel a little.
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Lee - N9LO? "I Void Warranties"

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I hit this problem last night. The difference between 6 mm and 0.25" is only 0.014". I had a piece of 7 mil copper foil. I rolled it out flat then cut a tiny shim rectangle. I wrapped that around the 6 mm shaft and installed the knob. Works fine - no obvious wobble. If you have 3 mil foil, use 2 wraps. With the 7 mil foil, I actually used just a 180 degree half wrap place opposite the set screw.

73,

Paul K2AYZ