[TowerTalk] 6 meter 6 element Telrex

[Joe Barnes]

I have 2 of the 6 element Telrex  6 meter beams I want to get up, 
however the coax loop that goes between the sides of the driven elements 
and ground is missing.Does anyone know what type of coax ( impedance) 
was used for this. I am guessing that it is a 1/4 wave, calculated with 
velocity factor,  piece of 50 ohm coax ( rg213 etc). Can anyone confirm 
or deny this please? Also I was told to stack these antennas 13-14 feet 
apart, again any info? Thank you, Joe N4JBK