View Single Post
  #1   Report Post  
Old December 27th 14, 10:04 PM posted to rec.radio.amateur.moderated
Tom Horne[_2_] Tom Horne[_2_] is offline
external usenet poster
 
First recorded activity by RadioBanter: Oct 2007
Posts: 76
Default Request help with antenna tuner challenge

I am using a Yaesu FT-1000 with a folded Dipole that is Ninety Feet in leng
th. To be clear this is literally a folded dipole were the two ends are fo
lded back to the middle and fed at that point. This is NOT a terminated fo
lded dipole! It consists of a loop of fourteen gauge copper wire that is On
e Hundred and Ninety Two feet long that is strung on either side of one foo
t long insulator rods. the opening in the loop is at the feed point locate
d at the middle of one side of the loop. From the feed point three Hundred
Ohm window line runs to a Six to One ratio BalUn. The internal tuner of t
he Yaesu FT-1000 tunes the antenna fine until I attempt to tune up on One S
ixty, Eighty, and Forty Meters. The results I get on those three bands are
erratic. Some times the tuner works fine and sometimes it shows a high SW
R warning and refuses to transmit. I was hoping that someone who knows how
to model antennas might be willing to run the numbers for me and advise wh
at ratio of balun is likely to bring the antenna consistently into the Yaes
u FT-1000's internal tuner's capability.

--
Tom Horne W3TDH