[Elecraft] K3 Antenna 1/2 Operation

[Robert Tellefsen]

I think I see the problem.

An ATU does not normally "autoadjust".  You have
to tell it that you want it to run.

You first set up the ATU with ant1 at whatever frequency
you want to use.  Then switch to ant2 and again set it up.
Now both antennas are matched on that frequency.

>From now on, you just switch between antennas and they
are already matched and ready to go.  The ATU remembers
its settings for each antenna until you change them.

If you switch to another band, you redo the matching, but
when you switch back to the first band, the memory remembers
the correct match for each antenna and resets itself accordingly.
And if you jump back to the second band again, the ATU remembers
the correct settings and is ready to go on that band.

Great feature.

Good luck and 73
Bob N6WG

----- Original Message ----- 
From: "Windy Dankoff KM5Q" <km5q at mac.com>
To: <elecraft at mailman.qth.net>
Sent: Tuesday, May 13, 2008 9:34 AM
Subject: Re: [Elecraft] K3 Antenna 1/2 Operation


>
> I have the same concern as Craig. The recommendation from Robert and
Vic
> don't work on my K3.
>
> Here's my scheme:
> Ant. 1 is a non-resonant dipole. On 20m for example, SWR is 4.5:1.
The ATU
> brings it to 1:1.
> Ant. 2 is a screwdriver vertical on tin roof, adjusted (with ATU
bypassed)
> to show 1:1.
>
> I set the ATU for for either antenna, or one then the other, but it
NEVER
> auto-adjusts when I switch antennas. Never on any band or with any
> (mis)tuning of my vertical, have I heard more than one relay click
when
> switching ANT 1/2 (no ATU reset).
>
> I'm running the new Beta FW now (no problem) and it's my third FW
version.
>
> Windy KM5Q
> K3 #764
> Santa Fe, NM
> -- 
> View this message in context:
http://www.nabble.com/K3-Antenna-1-2-Operation-tp17208306p17212835.html
> Sent from the Elecraft mailing list archive at Nabble.com.
>
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