Fw: Fw: Fw: Re: [Antennas] 450 Ohm Ladder Line

[Sandy and Kees Talen]

I still want to make the balun loss measurements for the one in the
tuner, but I'm rapidly coming to the conclusion (30Mhz anyway) 
.......for my situation which is a 250ft run to the antenna with plenty
of trees .....that:

1) a full run of RG8 foam coax has about a 40% loss (a run of 
   RG58 foam coax has a 70% loss) ......50% loss is 3dB, 20%
   loss is 1dB. Easy to run, medium cost.
2) 1/2" hardline where I can use it (RG8 for the rest) would have 
    a total 28% loss. More difficult to run and attach to, high cost 
    unless you can get it surplus.
3) a full run of 450 ohm window ladder line has a 12% loss (plus 
    balun losses). Low cost, work to modify, little more difficult
    to run, fun to use.  
4) a full run of 450 ohm window ladder line has very large losses 
   when wet/damp (on the order of 70% for modified line and 82%
   for unmodified line). Modified line when dry has a very slight 
   improvement over unmodified, too small to warrant the work.  
5) the old open wire 4"-6" spaced ladder line is not as affected by 
   moisture but is a pain to make and run.

Note: all the data above is based on a 250 ft transmission line.

73  Kees K5BCQ