I'm pretty sure some of the common mode choke approaches do exactly that
... except using the stray capacitance between the shields of the turns
to get the resonance. I suspect there are websites showing the right
configurations (number and diameter of the turns) necessary for
resonance. It's been a while since I read Jim's paper, but I think he
mentions that approach as well.
Dave AB7E
On 12/14/2017 1:32 PM, Jim Thomson wrote:
Ok, for MONOband use only, what about a simple parallel resonant circuit,
consisting of a solenoid coil of 50 ohm coax + parallel resonating fixed or
variable cap, or padding a variable cap ?
With cap wired between input and output braid. On paper, this appears to be a
very high Z, and low Q device. And wide enough to cover one ham band in
question. Is it doable ?
Whats the optimum L to C ratio for this concept to work ? IE; we would want
the highest Z practical, but a Q such that the high Z covers an entire band, or
portion of one band, or freqs of interest.
Jim VE7RF
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