[Test-Equipment] How to bush a knob for a 1/8" shaft

[Barry]

Doug,

I have some aluminum inserts from broken Tektronix knobs that have a 1/8" ID and a 0.280" (~ 9/32") OD.  If you could drill/bore the knob to fit that OD, it might work for you.  They're knurled so epoxy should hold them quite firmly.  I can drop one in the mail if you want it.

73,
Barry - N4BUQ

> I purchased a Millen grid dip meter (Model 90651A) over the internet only to
> have it damaged in shipping.  One issue is the two front knobs were broken.  As
> my luck would have it, while the left knob fits a standard 1/4" shaft, the
> right meter adjust knob is a 1/8" shaft.  Guess what the odds are of finding a
> matching pair like that anywhere?
> 
> So, if I could find a way to bush a 1/4" knob bore down to 1/8" and use a longer
> set screw, that's my first idea.
> 
> Has anyone solved this problem before and have you any suggestions?
> 
> 
> Doug W5JV
> 
> 
> 
> 
> 
> 
> Visit https://www.qrz.com/db/W5JV for some great vacuum tube finds.
> 
> 
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