[HBR] another HBR

[Darrell, WA5VGO]

Walt,

I fully understand your point, and it is a good one. I have never made any 
actual measurements, but tuning the receivers side by side, I really can't 
tell any difference. However, based on Kees' transformer measurements, I 
know they don't have the skirts of the Miller transformers. There are, of 
course possible explanations for this. Maybe the layout and lead dress I 
used in the one with the Miller transformers wasn't quite as good as the 
layout in the one using the military units?

73,
Darrell, WA5VGO



>One question for you Darrell; did you have the impression that I had that 
>perhaps the
>skirt selectivity wasn't quite as good with the BC-453 transformers?
>
>When you look inside the cans, the 'hot' leads for both primary and
>secondary pass *very* close to the windings and the outer layer of
>the windings is hot, so there's a tiny bit of capacitive coupling
>between primary and secondary.   I don't know how much it
>matters, but you'd never let the primary and secondary hot leads
>get near each other under the chassis, so it doesn't seem like a
>good thing.  It wouldn't have mattered in the military application, but
>for top rejection of out-of passband signals this seems 'impure.'
>
>However, I say again that I didn't really notice any problem.