"Howard Kowall" wrote in message
news
sorry I should mention the RG-59 is used for impedance matching not feed
line
thanks again
Howard

"Howard Kowall" wrote in message
...
Hello all
What determines the Velocity Factor of a coax cable.
Is it the center conductor awg,dielectric,shield or all combined
I am building a
Lindenblad Antenna for 2 Meters

its asked to use

RG-59 polyethylene foam coax with stranded center conductor

I think the VF is .66

I cant find any stranded center cond where I am,so I want to try it with
Solid,but it seems all the solid is VF .88

anyone have any input on this

thanx

howard


It's principally the relative permittivity of the dielectric that determines
the velocity factor. Air alone would yield a value of unity but the
presence of a spacer of some sort means practical values are smaller. Foam
can get close to air.

I wonder why you need a Lindenblad for 2 metres - do you really need good
circular polarisation over a range of elevation angles (and omni HRP, of
course)?

Chris