[Antennas] twin coax as shielded balanced line

[George, W5YR]

Basically, the bottom line is that you would notice little if any practical
effect from that short a section of coax. 

No observable loss, little or no impedance change due to the metal conduit
since the coax is shielded by its braid just like a single coax feedline,
no more loss than in any two foot coax run, except doubled due to two lines
in stead of one, and it would be better since you would avoid having to
transition to plain coax to go through the conduit and then back to a
balanced line.

Try it and see how it works!   <:}

72/73/oo, George W5YR - the Yellow Rose of Texas         
Fairview, TX 30 mi NE of Dallas in Collin county EM13qe   
Amateur Radio W5YR, in the 56th year and it just keeps getting better!
QRP-L 1373 NETXQRP 6 SOC 262 COG 8 FPQRP 404 TEN-X 11771
Icom IC-756PRO #02121  Kachina #91900556  IC-765 #02437

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van lincoln wd8aam wrote:
> 
> Question:  If I ran twin coax open wire feeders made from
> rg-58/u thru a metal conduit for 2 feet,
> 
> 1.  would I suffer a larger loss than in open air?
> 2.  would I change the impedance of the coax twinlead section?
> 3.  what kind of loss for two feet are we looking at?
> 4.  would this be better than plain coax for a two foot run thru metal
> conduit?
>      (lower loss.?)  Then change to regular open wire line, after the conduit?