[TowerTalk] RG-304 for CMC ?

[Jim Brown]

On Sun,4/24/2016 2:14 PM, Roger (K8RI) on TT wrote:
> What's the difference between using LMR-400, or BuryFlex with six 12" 
> dia Loops equally spaced, compared to bundling the same size loops 
> into a single bunch or for that matter, grouping any coax together 
> rather than equally spaced loops? It'd lower the resonant frequency, 

Right.

> but other than that (and looking neater), what about the choke's 
> characteristics?
> Would it narrow the range of high impedance?  Lower, raise, or leave 
> the maximum impedance unaffected?

In general, the peak value of Z increases as the resonance moves down, 
but primarily because L and Rs are multiplied by N squared. Bunching the 
turns together mostly changes C, which is mostly the C between turns. 
That moves Fr down, but has little if any effect on the peak value of Z.

73, Jim K9YC