[Collins] Re: [Johnson] Re: Advantages/disadvantages of an "L" tuner circ...

Sat, 16 Nov 2002 01:41:40 -0800

In following these posts, I am disadvantaged by a lack of knowledge on
tuner configuration so the posts have been helpful to me.  I surmise
that the highly regarded Heathkit SA-2060 is also not a balanced tuner.
Is this correct?
Also, in trying to learn more about these tuners, I reviewed the 2000
ARRL Handbook and read most of the information on the "High-Power ARRL
Antenna Tuner for Balanced or Unbalanced Lines".  Is this circuit
essentially a "T" configuration (unbalanced)?
Where might I find info on the circuit for a balanced tuner?
Chris
W7JPG

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of [email protected]
Sent: Friday, November 15, 2002 5:26 AM
To: [email protected]; [email protected]; [email protected]
Cc: [email protected]; [email protected]
Subject: Re: [Collins] Re: [Johnson] Re: Advantages/disadvantages of an
"L" tuner circ...

Actually, anything other than a balanced tuner is basically useless.
Coax 
fed antennas should be impedance matched to the coax at the antenna.  
Matching the coax to the transmitter in the shack doesn't do a thing for
the 
performance of the coax or antenna.  It simply accomodates today's low
range 
transmitter output circuits. And today's commercial unbalanced tuners
using 
baluns to accomodate balanced lines are inefficient.   That leaves us 
homebrewing balanced tuners.  In my view, that's the only way to go.

Jim W9TM 

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