Re: [Amateur-repairs] Old test eqpt? Chuck it? Refurbish it?

Craig

As I recall, HP used the same setup on their  200 series oscillators. You can fabricate one using a long shaft potentiometer and a rubber grommet.

make sure the potentiometer is the type with the metal housing held on by folded metal tabs.

make sure the grommet fits snuggly on the shaft of the potentiometer, I am sure you can see where I am going with this.

disassemble the potentiometer and discard the housing which holds the resistive wire element

cut the wiper end off of the shaft with a hacksaw, keep the shaft as long as possible, you can trim it later after the final fit.

file off the burrs and reinstall the shaft into the potentiometer collar and push the grommet onto the shaft at the end where the element used to be. The knob goes on the other end.

once you see how this works, it is a simple task to determine proper placement and drill the hole for mounting the home made vernier.

I hope this helps

73

 

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Alan

AK6MF

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