----- Original Message -----
From: "Bob Maser" <bmaser@tampabay.rr.com>
> Yes but how many times do you need to hear the answer?
> Bob W6TR
> ----- Original Message -----
> From: "KD7QAE" <KD7QAE@ARRL.NET>
>
>> Perhaps it is boring to you but for new builders (like me) it is quite
>> interesting.!
>>
What answer? I still don't know if typical single-layer plate chokes
rely on a parallel resonance to acheive suffcient low-end choking
impedance; I still don't know if the impedance vs. frequency curves
for typical single-layer plate chokes look similar to the multi-layer
"pie-wound" plate chokes like the ones illustrated in Orr's handbook
which show peak impedance values in excess of 1 megaohm across
a very broad frequency range; and I still don't know what, if any,
analytical models exist for a single-layer plate chokes (aside from way
oversimplied 3 element lumped RLC models). As to whether or not I
could buy a store bought choke from RF parts that would work in a
typical PA design or whether or not stray layout capacitance effects
the ultimate position of series resonances, thus requiring one to measure
the choke installed in-place, I already knew the ansswer to those
questions before this thread began :):)
73 de Mike, W4EF.....................
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