I just received a very nice SX-117, and started to clean it up. What is
nice about it, it only had light surface dust on it and cleaning up was only
wiping down with a rag and some pressurized air. Needs a few tubes, their
on order.
Got down to the main tuning control and it was slipping badly. The
compression disks were basically rotating without any friction to turn the
main tuning dial or the tuning cap. This is the fix I tried and it worked
nicely.
1) With a syringe oil applicator, applied lubrication (light oil) to all
bearings or rotating parts in the tuning mechanism, including the main
tuning cap brearings.
2) Carefully, very carefully, used a de-greaser to clean out the gunk
between the friction plates. The degreaser can melt plastic so a spray tube
was used to target just the metal parts. Lots of black gunk came out.
3) Rotated the tuning back and forth and whenever it slipped, hit the
friction plates with more de-greaser.
4) Vaseline lubed, the brass main tuning gearing.
The radio now has solid tuning, no slippage at all.
Bill G.
K2WH
Bill (Group Owner)