27-03-2018, 06:57 PM
(27-03-2018, 06:23 PM)Crackle Wrote: Both the 220 and 320 are a little coarse to tune because of the wide coverage an a relatively small scale, could really do with a much slower ratio tuning drive.
Perhaps ITT should have engineered a 'Tiny' version of the ball bearing reduction drive fitted to many mains operated sets which gave a very high reduction ratio for about 3/4 of a turn, then engaged the cord drive directly so that the entire scale could be tuned at the conventional speed.
I hope you know the type I mean - I've looked for a picture of one but failed!
