Gene,
>
> The tapes appear to be riveted to both the take-up reel and the anchor bar
> at the rear of the chassis. I have not yet examined these rivets to see if
> they are perhaps simple press-fit things that can be removed (hopefully), or
> if they are the kind you need to drill out so don't even go there and ship
> the whole thing back to Upland. Like that's gonna happen....
>
Somewhere I have a drawing of the chamberlin mechanism that was submitted with the patent
and it shows push-in press-stud like thingys to hold the tapes to the reels. They are friction fitting
only on the drawing. I assume a hole is made in the tape first with something like a paper-punch.
The pitch pot behavior seems to be
> stable pitch for some of the pot's rotation, then a slight drop off, then
> the motor drops to half-speed or so and then stalls. So I suppose that the
> motor is intended to be slightly sharp and the pot set somewhere in the
> "slight drop off" portion. This theory is reinforced by the existence of the
> spare motor pulley with a note next to it that says "use this pulley for
> A-440". So, tuning is set by pulley size, eh?
Does this mean tuning to different pitches or pitch swooping is not
possible on an M1?
John
M300#005
>