05-19-2009, 08:58 PM
Hi all:
I bought a heath IG-102 signal generator from ebay. Works fine, calibrated the bands, and even set trimmer to make the dial accurate. It has one annoying feature I didn't pay for, though - when the vernier knob is turned at a medium-fast rate, all is fine, but when it is turned slowly to zero in on a frequency, it slips. It would seem as if there is wear in the ball-bearing vernier drive, or maybe too much friction in the capacitor rotor shaft. I removed the cap and washed it in solvent, thinking old grease might have got gummy - didn't help. As for wear, the unit appears to have been used very little - not quite mint condx, but nice. Can the vernier shaft come out, and be replaced with a separate reduction drive? Can the frame of the cap be tweaked to reduce friction or apply more force to the drive ball bearings? All suggestions welcome, and thanks in advance!
73, Stirling.
I bought a heath IG-102 signal generator from ebay. Works fine, calibrated the bands, and even set trimmer to make the dial accurate. It has one annoying feature I didn't pay for, though - when the vernier knob is turned at a medium-fast rate, all is fine, but when it is turned slowly to zero in on a frequency, it slips. It would seem as if there is wear in the ball-bearing vernier drive, or maybe too much friction in the capacitor rotor shaft. I removed the cap and washed it in solvent, thinking old grease might have got gummy - didn't help. As for wear, the unit appears to have been used very little - not quite mint condx, but nice. Can the vernier shaft come out, and be replaced with a separate reduction drive? Can the frame of the cap be tweaked to reduce friction or apply more force to the drive ball bearings? All suggestions welcome, and thanks in advance!
73, Stirling.
Until next time,
Stirling KC0NXM.
