View Single Post
  #8   Report Post  
Old June 7th 11, 02:39 AM posted to rec.radio.amateur.antenna
Michael[_10_] Michael[_10_] is offline
external usenet poster
 
First recorded activity by RadioBanter: Aug 2009
Posts: 28
Default The Lazy H does not seem to exhibit any gain over a dipole in thereal world


Update on the 10 meter Lazy H...

I did a little reading on ladder line at the web page below;

http://www.athensarc.org/ladder.asp

and then in the ARRL handbook.

With the knowledge gained form the two sources I made the following
changes;

I changed the length of the 450 ohm ladder line feeding the antenna
to make sure it was not a multiple of a 1/2 wavelength at 10 meters,
and the antenna tuner was able to tune the Lazy H more easily. I also
suspect there may be a problem with the balun in the Dentron MT-3000a
tuner. When I hook up the Drake MN-75 tuner with the internal 4:1
balun I hand wound myself I am seeing gain from the Lazy H antenna in
it's preferred direction compared to the dipole, but when I switch to
the Dentron MT-3000a I am not seeing gain when I compare the dipole to
the Lazy H. I think I am going to remove the factory balun from the
Dentron MT-3000a and hand wind a new 4:1 balun for it.

Michael Rawls
KS4HY