Hi Richard? this topic began with an S-85, and has wandered off with good reason to its predecessors ?as well as the S-99.

Maynard mentioned the 40A and 40B? ?so I don’t know what ”it” ?means.

From what I have seen ON THE DRAWINGS, I tend to agree with Maynard , but I have not looked at the 40A.

What I will instead say L1, and L2 ?[coils??] seem to be transformers? and the primaries are isolated from ground unless the A2 is link is ?closed.. to ground, so they can be run either Balanced or single ended.

As far as I can see the so called L3 coils [not transformers] for band 1 and 2 are FIXED connected to ground, with no possibility of floating, so can never be run as “balanced” , but the 40A may well be the exception.

Looking at the ongoing variations as models changed, I will speculate that Halli had problems ?getting both RF tanks to track with the LO. ?Likely the first {RF} tuning tank gets swung around by the HOO-NOSE-WHAT antenna impedance. ??The S-99 has an antenna trimmer to help tune.

I am still stuck on how Band 1,2 signals get thru the S1 front and back wafers; but maybe the L3 coils have a lot of mutual inductance, and something tricky is going on. I wonder how physically close those coils really are to each other?

?