Antenna tuners

[N5SM]

Hi

Has anyone checked to see if it would be possible to get the  Kat100-1
external
antenna tuner for the k2 to work with the K3?
I'm planning on ordering the K3, but don't want to have to pay for two
antenna
tuners.
Any ideas?
Thanks
Scott N5sm

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[Ed Muns, W0YK]

> Has anyone checked to see if it would be possible to get the  
> Kat100-1 external antenna tuner for the k2 to work with the K3?
> I'm planning on ordering the K3, but don't want to have to
> pay for two antenna tuners.

>From the K3 FAQ web pages on the Elecraft web site:

The KAT100 and KPA100 in an EC2 enclosure is NOT supported. The KPA100 was
designed as an integral part of the K2, and specifically not as a general
purpose HF amplifier. In addition, the KPA100 does not include coverage of 6
meters.  The KAT100 requires considerable bi-directional traffic on the
auxbus, and could lead to RFI and other issues.

73,
Ed - W0YK

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[waltk8cv4612amos]

I too finally came to that conclusion ! I have a old LDG AT-11 and had it on
one rig and the light bulb went off over my head and I put it in the output
from the 6 port B&W coax switch in the line to the linear. Now any rig that
I am using gets tuned. It works great. A newer model with memories would be
even better as most of my antennas are fairly well matched anyway.

I too have a KAT-100 and yes, it would be neat if that could be used without
the RS-232 connection to the K-2. Probably some way to trick it into
thinking it is connected to a K-2 :-)

Walt K8CV Royal Oak, MI.


----- Original Message -----
From: "Scott McDowell" <[hidden email]>
To: <[hidden email]>
Sent: Saturday, August 25, 2007 11:13 PM
Subject: [Elecraft] Antenna tuners

> Hi
>
> Has anyone checked to see if it would be possible to get the  Kat100-1
> external
> antenna tuner for the k2 to work with the K3?
> I'm planning on ordering the K3, but don't want to have to pay for two
> antenna
> tuners.
> Any ideas?
> Thanks
> Scott N5sm
>
> _________________________________________________________________
> Learn.Laugh.Share. Reallivemoms is right place!
> http://www.reallivemoms.com?ocid=TXT_TAGHM&loc=us
>
> _______________________________________________
> Elecraft mailing list
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> Subscriber Info (Addr. Change, sub, unsub etc.):
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> Elecraft web page: http://www.elecraft.com 

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[Don Wilhelm-4]

Walt and all,

Just one clarification (for the protection of your KAT100 and K2).

The KAT100 does not talk with any RS-232 signals.  It does connect to
the K2 AUX I/O connector, but that is not rs-232 either - there are only
3 RS-232 signal lines (RXD, TXD and signal ground) in the AUX I/O
connector.  All the rest of the signals are K2 unique for communicating
with the KAT100 (and remote KPA100 and/or KRC2).

This is a reminder that your K2 (and KAT100 and KPA100) can be damaged
by connecting a regular computer serial cable to the AUX I/O connector.  
It is labeled AUX I/O for that very reason - it is NOT an RS-232 port.

Just because a serial cable will fit does not make it a serial port.

73,
Don W3FPR

[hidden email] wrote:
> snip
>
> I too have a KAT-100 and yes, it would be neat if that could be used
> without the RS-232 connection to the K-2. Probably some way to trick
> it into thinking it is connected to a K-2 :-)
>
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[Tom-5]

    Speaking of antenna tuners.... Is there any possiblity that the new
K3 antenna tuner can be put in a seperate box and be remotely
controlled? I use a 102' dipole, fed with balanced feedline, which then
goes into a back room in the basement. There, it hits a 4:1 balun, and
then it sees an LDG RT-11 (a remotelly controlled antenna tuner). I then
have 75 feet of coax from the antenna tuner to the shack.

    This is the best of all possible worlds. Any mismtach is taken care
of by the tuner, and the subjected line loss of the coax. And it works
very well. I convinced a buddy of mine to try a balanced fed dipole, and
a remote antenna tuner, and he claims he has never had stronger signals
on 40 and 80 than before. (He had over 120 feet of coax to the tuner/balun)

    I have no idea what tytpe of signals the K3 antenna tuner wants to
and from the K3. I don't care if it's not rs-232, most CPU I/O signals
can be buffered and balanced and sent a long ways.

    Maybe when that "manual" appears we can look at this.

    tom K8TB  K3 FBxxx



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[Julian, G4ILO]

On 8/26/07, K8TB <[hidden email]> wrote:
>     Speaking of antenna tuners.... Is there any possiblity that the new
> K3 antenna tuner can be put in a seperate box and be remotely
> controlled?

If it is anything like the KAT2 then I think that the tight
integration with the transceiver would make it difficult to achieve.

I agree with you that the best place for the ATU is at the antenna
feedpoint. I used to use a remotely mounted SGC ATU with my loop, but
I missed the convenience of automatic bandswitching without having to
transmit RF after each band change. A standalone, boxed ATU capable of
being fully controlled by the K3 would be a nice future option.
Fortunately for me, one of the few benefits of having to use indoor
antennas is that I have only 2m of feeder between the K2 and the
antenna feedpoint, so the losses even with an extreme mismatch are
tolerable.
--
Julian, G4ILO K2 s/n: 392  K3 s/n: ???
G4ILO's Shack: www.g4ilo.com
Ham-Directory: www.ham-directory.com
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[Craig Smith]

<> A standalone, boxed ATU capable of
<> being fully controlled by the K3 would be a nice future option.

I agree.  I suggested a remote tuner as a K3 option some time ago, but I
know the plate is full at Aptos.  I have an Icom AH-4 that I use with my
IC-7000 in a remote configuration with my ladder line fed multiband doublet,
and it is a really slick setup - both in terms of performance and
convenience.  Don't know what I'll do when I get my K3.  SGC to me doesn't
seem like a viable option.  If you look at the power ratings for most of
their tuners they are rated at 80W CW max.  They have one that is rated for
over 100W CW, but it is almost $1000.  And they haven't released a new
product in several years which makes one wonder about their commitment to
the amateur market.  A remote automatic tuner that operates seamlessly with
the K3 would be a great option for Elecraft to consider.

73
          ... Craig  AC0DS


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