From rjacobsen@rushmore.com Sat Jan 08 14:15:01 2005
Subject:Re: Switching versus transition speeds


> A 122 style amp which uses the dc voltage to switch speeds
> will react SLOWER to throwing the switch than a 147 style amp.

As I posted earlier, that is what I described about my 122 Leslies.
There is a little time from when I throw the switch to the time the
slow motor disengages, allowing the fast motor to be fast.

> However, this has NOTHING to do with ramp up/ramp down speeds.

I agree totally!

> You can play with ramp down speed on a two speed Leslie somewhat by
> adjusting the slow motor shaft sideways to vary the friction
against
> the idler wheel. More friction = faster ramp down, less friction =
> slower ramp down. Too much friction = slow motor won't engage, too
> little friction = slow motor slips. As the idler wheel wears down,
> ramp down times will increase unless the slow motor position is
> readjusted.

I understand exactly what you're talking about. In one of my 122's,
the slow motor wasn't working for the low rotor. I took it to a
repairman and he cleaned it for me. When I reassembled it, it was
very tricky to get it adjusted for it to work properly. I've never
messed with the upper rotor though.

Thanks for the input! Rick