[ARC5] Re-reading Gordon White article...

[Bruce Long]

I have a vauge memory of reading somewhere the gain adjustment with frequency is needed because of the change of the tuned resonant circuit L/C ratio changes its effective impedance and there for the gain of the associated amplifier stage.  Can't remember any details----but just found this in section 23.3 of The Radio Designers handbook  Langford-Smith
Section 3 RF Amplifiers
Parallel Tuned Circuits
" A simple parallel tuned circuit is sometimes used in the RF stage and can be made to give higher gains than the transformer coupled arrangement.  The difficulties encountered are that:
1 large gain variations occur across a band of frequencies.
2 the skirt selectivity is rather poor
3 tracking with conventional aerial circuits is difficult
etc"

So i think the previous comment- sorry i forgot who made it   that the fixed tuned resonance below the operational tuning range sets up a decreasing gain slope that compensates a companion increasing gain slope is probably right on the money.