Straight Line Frequency Capacitor

[Radio Fixer]

Thanks for your graphs and pondering Al and I have taken copies. I found it most interesting and it has some relevance to me as I made a Wobb with two oscillators, one fixed and the other variable. Mixed they gave me a Wobb that goes from 0 to 2mHz and is ideal for supie IFs, also TRF's and bandpass filters.

I got the padding right of the variable one empirically.

Gary