Thread: G5RV
View Single Post
  #13   Report Post  
Old September 27th 08, 11:50 PM posted to rec.radio.amateur.antenna
Owen Duffy Owen Duffy is offline
external usenet poster
  
First recorded activity by RadioBanter: Dec 2006
Posts: 1,169
Default G5RV
(Peter) wrote in news:48de67d3.1883747435
@news.virginmedia.com:

A popular antennas over here in the UK is a centre fed doublet,
80 to 100 Foot top with 450 ladder line feeder into your ATU. You
will need a balun near the shack end if your ATU is coax only input.
This makes feeder access into the shack easier than balanced feeder
coming in. DX Engineering makes excellent baluns for this purpose.
This antenna will work all HF bands, 80m and up.

Modelling suggests that the efficiency of such an antenna degrades quickly
for dipole lengths less than about 35% of a wavelength.

80' is 28% of a wavelength at 3.5MHz.

Owen
Reply With QuoteReply With Quote