[Elecraft] KAT-500 and 30' Flag Pole Antenna Users?

[Dr. William J. Schmidt, II]

I have that flag pole and use the KAT500 to tune it.  I've used several
other tuners in the past too, mostly old remote military models.  Power
offers no issues... if the antenna tunes at 5 or 100 watts, it will tune at
500 watts.

One thing I always do (at least I've learned something important from this)
is to plot the Real and Imaginary part of the antenna as a function of
frequency...that the tuner will see (either remote at the antenna or in the
radio house).  You can do that with a simple impedance bridge.  Then I plot
the transfer function to 50 ohms real and overlay the transfer function
space of the tuner.  That easily tells you where the tuner will have trouble
matching the antenna and where it (theoretically) will work just fine.  This
will answer all of your questions.  It may also tell you where you need work
on your antenna (e.g. If you plot the impedance of the antenna as you lay
radials, it will asymptotically approach a limiting value with infinite
radials.  When you don't see it move, more radials probably isn't worth the
extra work). 


Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ/ PJ4HZ
 
Owner - Operator
Big Signal Ranch
Staunton, Illinois
 
email:  bill at wjschmidt.com

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Javier Campos
Sent: Friday, July 26, 2013 11:36 PM
To: elecraft at mailman.qth.net
Subject: [Elecraft] KAT-500 and 30' Flag Pole Antenna Users?



 
Looking for any feedback on the use of the KAT-500 with a 30' Flag Pole
(Zero-Five) Antennas under 100 watts and if an Amp is used, that would be
nice to get some feedback.

I've moved into an HOA zone and will be putting up a Zero-Five 30 foot flag
pole and looking to get a tuner as I have an Acom-1011 Amp (want to switch
to the KPA-500). The antenna will use a 4:1 UNUN.

Let me know how the KAT-500 and if you have the KPA-500 (or any amp for that
matter) works with the flag pole etc.

I plan on being active on all bands 80-10

Thanks 

Javier NM6E/5
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