[Elecraft] K3 ATU specifications

[Robert Tellefsen]

Bill
Whether the ATU is internal or external is not the question.
The real problem is what impedance the feedline presents
to the rig on each band.  If it is something outrageous, no
ATU is likely to tune it.

You would be better off borrowing an antenna analyzer
from someone and measuring the impedance at the shack
end of the feedline to see what an ATU would have to
try to match.

If it is too unreasonable on some band, you can alter it by
changing the length of the feedline, just add another 10 ft or
so at the shack end and measure again.  Eventually you will
find a length for the feedline that will give a workable
impedance on all bands and your ATU from whatever source
will be happy.

Good luck and 73
Bob N6WG



----- Original Message ----- 
From: "KB1PXD" <bill.kimura at gmail.com>
To: <elecraft at mailman.qth.net>
Sent: Thursday, April 10, 2008 3:41 AM
Subject: [Elecraft] K3 ATU specifications


>
> Greetings everyone,
> I'm trying to debate whether or not to pickup an external LDG tuner
or just
> go
> with the K3 built-in ATU.  Does anyone know the tuning
specifications of the
> ATU?  I need a tuner that will hopefully tune every band to <= 1.5:1
on a
> Cobra
> multiband dipole antenna.  The built-in ATU in my TS-850 has
difficulties
> with
> certain frequency ranges within a couple of bands.  Should I go with
the
> built-in
> K3 ATU, or remove that from my order and just pickup an a decent
external
> LDG tuner?  Any advice would be greatly appreciated.
>
> Thanks!
>
> - Bill, kb1pxd
> -- 
> View this message in context:
http://www.nabble.com/K3-ATU-specifications-tp16607551p16607551.html
> Sent from the Elecraft mailing list archive at Nabble.com.
>
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