[TowerTalk] Another way to make a CM choke ?

[Jim Thomson]

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