Jim Flanagan wrote:

By the way..
The SB104 used a less expensive LMO due to the fact that there was
no need for a linear tuning characteristic. This is because having a
digital readout meant that it wasn't necessary..

I was so disgusted with the poor stability and linearity in my SB104's
VFO that I designed a simple VCO that used a 10T pot as the drive. It
was more stable, quieter, and easier to tune than the original... I
wonder what I did with those schematics?

-Chuck Harris