[R-390] Collins R 389 PTO

[Flowertime01 at wmconnect.com]

Bill,

R389 did run into a to least a couple 1000 built.
We think there may be 25 units at current time that need a VFO.

Down the other path, what are the chances of mixing core stuff and epoxy to 
make a new core? 

We could do a cold glue core and machine it to size and thread that would 
fit the shaft.

Then we would have to do a new coil form and wind a coil.

We could select the new core outside diameter to fit a stock core form.

I cannot imagine how many test coils would need to be wound to get the 
inductance and linearity close enough to be usable.

Roger AI4NI