Thanks Don and Rick for all the help.
chuck
- Original Message
From: Don Wilhelm w3...@embarqmail.com
To: K6LE k...@mac.com
Cc: callen1155 callen1...@yahoo.com; elecraft@mailman.qth.net
Sent: Wed, February 24, 2010 11:16:01 PM
Subject: Re: [Elecraft] Thoughts on internal vs external
Thanks guys for all the input.
I have a better understanding of the capabilities of each option.
73.
chuck
af4xk
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Hello guys.
Narrowing down the options I 'need' in a K3.
Regarding an internal vs external ATU:
If you were going to operate your K3 at 100 watts (no plans for an
amplifier), radio to be used only at home (no portable operating), and one
of your antennas was a dipole that can be tuned over
As usual, it depends. In this case it depends upon the feedline losses on
your all band dipole.
If it is something like a G5RV doublet fed with ladderline with low feedline
losses, then the internal tuner will work fine. If it is fed with coax of
any appreciable length, then the external tuner
I used my K3 with built in matching unit directly into a low (avg 10ft agl)
doublet of 88ft per leg (somewhat bent) and a short feeder directly into the
PL. No rf earth, isolated mains supply. Worked well across 160 to 10. I
should have used a coax choke but it worked very well. It has
, February 24, 2010 12:44:38 PM
Subject: [Elecraft] Thoughts on internal vs external ATU for K3
Hello guys.
Narrowing down the options I 'need' in a K3.
Regarding an internal vs external ATU:
If you were going to operate your K3 at 100 watts (no plans for an
amplifier), radio to be used only at home
Thanks guys. You do make a strong case for the internal unit. My internal
unit on my K2 (15 watts) works great.
My dipole is coax fed - U shaped, no balun, running thru attic and out eaves
to back of yard. My shack is on the 2nd floor (no RF ground)
I've never used an external ATU and was
that in mind if money is a factor. Otherwise, buy both!
Steve
N4LQ
- Original Message -
From: callen1155 callen1...@yahoo.com
To: elecraft@mailman.qth.net
Sent: Wednesday, February 24, 2010 2:40 PM
Subject: Re: [Elecraft] Thoughts on internal vs external ATU for K3
Thanks guys. You
Most internal tuners, like my FT-920 and Mark-V FT-1000MP, have very limited
range, but the K3 tuner has a wide range, and is very fast. Well worth the
money.
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Steve,
You stated Every time you change bands, you must push the ATU Tune
button.
If that's true then I have been operating my K2 ATU incorrectly but it seems
to work fine the way I've been doing it. Initially, or after any change, I
run thru the bands tuned to the cw portion and hit the
This isn't true, is it? It's certainly not the case for the K1 or K2
tuners, and I can't believe that the K3 is less capable.
Peter N8MHD
On Wed, Feb 24, 2010 at 1:52 PM, Steve Ellington n...@carolina.rr.com wrote:
I'm afraid you have the wrong concept of the internal tuner. Every
It depends on whether the antenna is badly out of balance and whether it is
low or high impedance.
With coax based antenna and when the balun is not required, KAT3 is very
convenient. When one uses unbalanced high SWR antennas fed by ladderline or
TV line, one needs an efficient current balun.
seconds to tune
again.
Willis 'Cookie' Cooke
K5EWJ
From: callen1155 callen1...@yahoo.com
To: elecraft@mailman.qth.net
Sent: Wed, February 24, 2010 2:12:49 PM
Subject: Re: [Elecraft] Thoughts on internal vs external ATU for K3
Steve,
You stated Every time
You do *not* have to push the ATU button every time you change bands.
See the firmware release notes for MCU 3.03.
The ATU remembers the last setting used on each band/antenna input; in
fact, it remembers the setting for every 20 kHz segment (every 10 kHz
segment on 160m, every 50 kHz segment
To: elecraft@mailman.qth.net
Sent: Wed, February 24, 2010 1:40:53 PM
Subject: Re: [Elecraft] Thoughts on internal vs external ATU for K3
Thanks guys. You do make a strong case for the internal unit. My internal
unit on my K2 (15 watts) works great.
My dipole is coax fed - U shaped, no balun, running
Still confused guys on the Re-Tune issue. So on my coax fed dipole, if I
press ATU TUNE at 7.030, wouldn't that be enough to tune the 7.000 thru
7.060 freq range without retuning whenever I 'band switch' back to 40 meters
and operate in the above cw range?
chuck
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Cookie and all,
That is *not* true for the KAT3 (it was for the KAT2 and KAT100).
Look on page 22 of the new owners manual. The K3 saves up to 30 ATU
setting for both antennas on every band.
However, if you have not yet done so, you will have to do a TUNE at
several frequencies throughout the
follow along as you spin the dial like ICOMs do.
Steve
N4LQ
- Original Message -
From: Richard Ferch ve3...@storm.ca
To: elecraft@mailman.qth.net
Sent: Wednesday, February 24, 2010 3:48 PM
Subject: Re: [Elecraft] Thoughts on internal vs external ATU for K3
You do *not* have to push the ATU
Chuck,
The short answer is YES.
The longer answer is if you move far enough away from the original
frequency where the antenna was tuned,. and the SWR increases, just do
another TUNE and that will be remembered for that band segment too.
I believe you also asked about an external wattmeter -
Wilhelm w3...@embarqmail.com
To: WILLIS COOKE wrco...@yahoo.com
Cc: callen1155 callen1...@yahoo.com; elecraft@mailman.qth.net
Sent: Wed, February 24, 2010 3:09:09 PM
Subject: Re: [Elecraft] Thoughts on internal vs external ATU for K3
Cookie and all,
That is *not* true for the KAT3
24, 2010 3:48 PM
Subject: Re: [Elecraft] Thoughts on internal vs external ATU for K3
You do *not* have to push the ATU button every time you change bands.
See the firmware release notes for MCU 3.03.
The ATU remembers the last setting used on each band/antenna input; in
fact
Cookie,
Download the latest manual from the Elecraft website - that is where I
found that info.
73,
Don W3FPR
WILLIS COOKE wrote:
I do have a KAT3 and have never owned a KAT2 or KAT100. My owners manual is
the one that came with the K3 in June of 2008. It does not say anything
except
From: Don Wilhelm w3...@embarqmail.com
To: WILLIS COOKE wrco...@yahoo.com
Cc: callen1155 callen1...@yahoo.com; elecraft@mailman.qth.net
Sent: Wed, February 24, 2010 3:09:09 PM
Subject: Re: [Elecraft] Thoughts on internal vs external ATU for K3
Cookie and all,
That is *not* true
Amen to that! And it gets *all* of the RF out of the shack as well. I
recently moved my fully balanced homebrew kilowatt autotuner out to my
garden shed about a hundred feet from the shack where it feeds the
ladderline going up to my 160M horz loop. I have been fighting
RF-in-the-shack
Hello Chuck,
That is my situation, and I opted for an external tuner. I did that
to avoid the loses that I would get from using 140 feet of buried coax
to my dipole. My antenna tuner is located at the other end of my
coax, so my loses are minimized. This involves using a remote,
Thanks guys for all the info.
I have one other question about the ATU use with two antennas.
Say I have two antennas connected to the ATU , one is a dipole (non
resonant- need the ATU to 'match') and the other antenna is a Hustler BTV6
(which i've just purchase having never used a vertical)
From: callen1155 callen1...@yahoo.com
To: elecraft@mailman.qth.net
Sent: Wed, February 24, 2010 5:13:17 PM
Subject: Re: [Elecraft] Thoughts on internal vs external ATU for K3
Thanks guys for all the info.
I have one other question about the ATU use with two antennas.
Say I
Chuck,
While you cannot have one antenna set to bypass and the other one for
tuning - there is an easy way to accomplish that.
Since the K2 and K3 tuners remember the settings for each antenna jack
separately, just pre-tune the one you will not use for tuning into a 50
ohm dummy load. Then
I'll weigh in on this one, too, since I'm considering this option quite
seriously.
With my home-only station running QRP CW I use a nice 100+ Watt external tuner
(even for QRP). It has the obligatory cable connected between it and the radio
plus a grounding cable plus a power cable and
To: WILLIS COOKE wrco...@yahoo.com; d...@w3fpr.com
Cc: callen1155 callen1...@yahoo.com; elecraft@mailman.qth.net
Sent: Wednesday, February 24, 2010 4:51 PM
Subject: Re: [Elecraft] Thoughts on internal vs external ATU for K3
Well, I switched my 160 inverted L to 15 meters and tried it. The first pass
: [Elecraft] Thoughts on internal vs external ATU for K3
Cookie
Now switch back to 160m. Don't touch anything. Is your receive level ok? Now
transmitDid receive level improve? Did the tuner go back to it's 160m
setting WITHOUT transmitting at all? Just curious.
Steve
N4LQ
- Original Message
Have to disagree Don!
I have a ladder line fed doublet (with outside balun) attached to Ant 1 and an
R7 on Ant 2.
I have Ant 1 set to use the ATU and Ant 2 Bypassed since I don't need the tuner
for it.
When I switch between Ant 1 and 2 the ATU indicator comes on for 1 and off for
2.
Slick!
Rick,
OK, that may be possible with the KAT3, but it certainly is not possible
with the KAT2 or the KAT100. I do not have a tuner in my K3 because I
have all resonant antennas - no tuner required, so I bow to your experience.
73,
Don W3FPR
K6LE wrote:
Have to disagree Don!
I have a ladder
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