larry d clark wrote:


i have always wanted to build a step motor driven
balanced tuner. i have acquired an excellent tx air capacitor
and 2 matched 28 uh roller inductors. next step is
to acquire 2 step motors with some kind of positioning
indicator, either optical or a pot.

any have any recommendations for a company site, or for
anyting else related, pulleys, belts, encoders etc

larry
kd5foy

Why using stepmotors.

Try to get syngons ( or synchrons ) instead. These are motor-alike things
that you feed with AC and when you turn one of them, the other reciproces.
It's like a radio controlled servo but without the usual QRM from the
motors.

Cheers


Dan / M0DFI