[R-390] Theory Question - RF Transformer Alignment

[Ed Zeranski]

..................... I didn't realize the cams were spirals and
thought they were trial and error shaped  to linearize the inductance change
to a linear frequency change.

..... This was what my spreadsheet calculation indicated when I tried to
reach convergence with a coil that had a linear inductance profile.  I have
no doubt an inductance profile could be imagined that would defy
adjustment.....

I'm more impreesed with the '390 receivers every time I see posts like this.
Those Collins guys must have had really excellent integration of electrical
and mechanical design efforts, all to the tune of juggled slide rules.

EdZ KG6UTS
EAC #237 1960 contract
SW 1959