[SPAM] [Antennas] Legal-Limit tuner advice....?

[Jim Walker]

Start looking for a used Palstar AT4K or if you can afford it, the new AT5K.


-----Original Message-----
From: antennas-bounces at mailman.qth.net
[mailto:antennas-bounces at mailman.qth.net] On Behalf Of John Lawson
Sent: Thursday, August 17, 2006 1:36 PM
To: amradio at mailman.qth.net
Cc: antennas at mailman.qth.net
Subject: [SPAM] [Antennas] Legal-Limit tuner advice....?



   Soon I'll want an antenna tuner that can handle full-legal-limit AM from
an unbalanced output into a balanced-feedline, balanced loop HF antenna.

  There's the Ameritron ATR-30 (I have a 15 currently) - but I thought I'd
ask the Great Convened Masters if anyone had any experiences pro or con with
the various Tuners extant, new or easily available used.

   I am going to build one eventually that will automatically tune my
fence-loop at the feedpoint of the antenna over the complete range of
impedances that will be seen at that point - probably use coax or hardline
for the transmission line from the Transmitter - but until then, I'll be
looking for something that can handle, say 500 watts continuous at 100% duty
cycle.


   My current set-up is: Johnson Valiant unbal out into Ameritron ATR-15,
balanced out into 450-ohm ladder-line to the feedpoint of a loop, approx
450' circumference, around my back fence at a height of roughly 6 feet AGL.
And it tunes 1.1:1 on the AM Windows of 80 M...  so the Concept is 
working, at least....    A bigger transmitter is, however, on the 
horizon.   ;}


   Thanks in advance...


  Cheers

John  KB6SCO
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