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

[Doug Hensley]

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






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