Thread: Multi wavelength antenna
View Single Post
  #3   Report Post  
Old September 2nd 08, 01:06 AM posted to rec.radio.amateur.antenna
Dave Oldridge Dave Oldridge is offline
external usenet poster
  
First recorded activity by RadioBanter: Jul 2006
Posts: 234
Default Multi wavelength antenna
wrote in news:2fe6eaf1-fc2f-409c-b46c-62812bb84d9e@
25g2000hsx.googlegroups.com:

I have a lot of space available for antenna installation and i am
wondering if installing a 4 or 8 wavelength antenna would provide
increased performance or problems. For instance, instead of a 120 ft
dipole for 3900 khz a 480 ft or 960 ft.

I would be installing across a valley so ends would be about 25-30 ft
off the ground and the center would be about 80-90 ft off the ground.

The pattern looks best for a 960 foot wire. Feed it a the end with a
quarter-wave (or 3/4 wave) open wire or ladder line and use a tuner. Be
prepared for some lossiness in the feed in wet weather.

It should actually be fairly good for DX off the ends.

--
Dave Oldridge+
ICQ 1800667
Reply With QuoteReply With Quote