[R-390] TECHY Q.

[Pete Williams]

​The    COSMOS   pto  main coil is logarithmically  wound.
Can  someone improve my  view  that  it must  contribute to  linearity in
tuning.......  If   so how?
I   assume tuning  core positioning  approximates  what the   shape of  the
tuning  capacitors  are in  broadcast tuning  linearity receivers to
achieve low frequency linearity.
Cheers
pete  VK3IZ