[TowerTalk] TH11DX and Belden 9913

[Mahlon Haunschild]

Belden 9913 has a 10 AWG solid coppper center conductor within an 
airspaced dielectric.  When moved frequently (such as in a rotator 
loop), the center conductor migrates away from the center of the 
dielectric, creating impedance bumps in the cable.  CQ Flexi 4XL is 
otherwise identical to 9913 but has a stranded center conductor, which 
is much more flexible.  It is not as susceptible to center conductor 
migration.

regards,

Mahlon - K4OQ

Bernard wrote:

>     I was looking at the instruction manual for the HyGain TH11DX and noticed that it said that Belden 9913 coax is NOT recommended as feedline.  Anyone know why?  I just bought some CQ FLEXI 4XL from the Wireman and I think that it is a variation of the Belden 9913.
> 
>     73
> 
>     Bernard, WA4OEJ
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