"Steve" wrote in message
...
Richard,
I was the guy that had the SP-600 backlash problem.
The solution was indeed the pre-loading on the front
of the tuning cap. Actually, the ball bearing that the
adjusting screw hits was rusty causing a lot more friction
than
usual. When changing direction while tuning I could see
the
spring spiders flex, which led to backlash.

Steve
Good, the bearing is something that I think is easy to
overlook. I think I should clarify that this is not the
bearing adjustment on the back of the tuning condenser
itself (which I am sure an also cause trouble) but on the
gear that drives it. I ran into this after reading your post
and the thread it started.


--
---
Richard Knoppow
Los Angeles, CA, USA