[Antennas] 600 Ohm Ladder Line

[Bob Stein]

Durwydd MacTara wrote:
> I need the necessary formula(e) to make some 600 ohm ladder line. This 
> stuff is almost impossible to find in todays market!  Also need to make 
> some from resistance wire for a 500W termination for a non resonant 
> Rhombic.
> 
>             Durwydd MacTara
> 
> 
> _________________________________________________________________
> Add photos to your e-mail with MSN 8. Get 2 months FREE*. 
> http://join.msn.com/?page=features/featuredemail
> 
> - - -
> Your moderator for this list is:
> Larry Wilson KE1HZ antennas-owner@mailman.qth.net
> _______________________________________________
> Antennas mailing list
> Antennas@mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/antennas
> 
For open-air line:
Z=276[log(2D/d)]
where Z=characteristic impedance in ohms
       D=spacing between wires
       d=wire diameter
and D and d are in the same units (inches or cm or mm)

Bob, W6NBI