On Thu, 17 Mar 2005 01:10:07 GMT, Carter Grabarczyk
wrote:

I am using a Johnson KW Matchbox antenna tuner with a 130 foot long, 30
foot high dipole fed with about 40 feet of ladder (window) line. It
works well on all bands including the WARC bands *except* for 30 meters.
(it doesn't make any difference if the band switch is on 20 or 40--it
will not tune 30 in either case).

The question is, does anyone have any tips/suggestions/modifications to
make this also operate on 30 meters?

By the way, modifying the antenna is not an option--lucky to have it up
at all with city and subdivision restrictions. Maybe could add extra
ladder line in the basement shack, but would have to loop it around the
basement ceiling???

73,
Carter
K8VT

I also have a 130 foot low dipole fed with ladderline. My feedline is
47 feet, going to an mfj tuner. I can tune 30 meters easily. You might
try adjusting the length of your feedline. You're using a different
tuner, so what you do may not match what I do, but playing with the
length of your feedline may help. Then again, it may not :-( Guess
that's why they call it amateur radio...

bob
k5qwg

Bob Miller wrote:
I also have a 130 foot low dipole fed with ladderline. My feedline is
47 feet, going to an mfj tuner. I can tune 30 meters easily. You might
try adjusting the length of your feedline. You're using a different
tuner, so what you do may not match what I do, but playing with the
length of your feedline may help. Then again, it may not :-( Guess
that's why they call it amateur radio...

"Playing" with the length of feedline may not help but
making it about 54 feet long will solve the problem. A
little cut-and-tryin' will eliminate the need for a
tuner altogether. Of course, 54 feet of window-line may
put the impedance out of bounds on some other band.
--
73, Cecil http://www.qsl.net/w5dxp


----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 100,000 Newsgroups
---= East/West-Coast Server Farms - Total Privacy via Encryption =---