Hi Donald,
I would be very cautious about doing any vigourous cleaning of the tuning capacitor. The vanes are only sweated onto the shaft with solder, which is quite old now, and they can be pulled off with very little force as the solder will have lost some of it's strength. Dont ask how I know!
and it's the devil's own job to refit properly, as access to the shaft is very limited on the 'inside' vanes.
Ultra-sonic cleaning seems the gentlest way to go, if you really
must do it.
Dont forget nobody normally sees this part, so I, personally, would not fret too much about it's cosmetic looks. Do lightly oil the bearings, and use a small amount of switch cleaner on the shaft earthing spring,though. Tony
