Re: [Elecraft] KX2AT2 vs T1 Tuner?

2017-07-20 Thread Ignacy 
The balun made of  a jumper between the radio and the tuner works at low SWR
so its losses are negligible. The same jumper on the outside will work at
possibly very high SWR and may have substantial losses.

Ignacy, NO9E



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Re: [Elecraft] KX2AT2 vs T1 Tuner?

2017-07-19 Thread Don Wilhelm 
That same "balun" (actually a common mode choke) will work the same with 
the internal tuner.  In other words, if it is "good for the T1", it will 
also be "good for the internal tuner".


A common mode choke at the antenna feedpoint will solve many problems. 
If the feedline does not run perpendicular to the center of the antenna, 
the feedline may pick up radiation from the radiator and an additional 
common mode choke at the KX2 end can be helpful.


73,
Don w3FPR

On 7/19/2017 4:13 PM, Ignacy wrote:

Internal tuner is very convenient with extra pluses of remembering setting
and not requiring an extra battery. But with some antenna x freq
combinations,  SWR is sensitive to touch and a balun is needed - an extra
weight. With T1, that balun could be a few turns of jumper made of RG-174
around a toroid.

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Re: [Elecraft] KX2AT2 vs T1 Tuner?

2017-07-19 Thread Ignacy 
Internal tuner is very convenient with extra pluses of remembering setting
and not requiring an extra battery. But with some antenna x freq
combinations,  SWR is sensitive to touch and a balun is needed - an extra
weight. With T1, that balun could be a few turns of jumper made of RG-174
around a toroid. 
Ignacy, NO9E 



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Re: [Elecraft] KX2AT2 vs T1 Tuner?

2017-07-19 Thread Phil Hystad 
I went thru the same thinking when I bought my KX2 — internal tuner versus 
external T1 tuner.

The added and simplified convenience of the internal KX2 tuner won out over the 
price of the tuner.  However, my T1 is still important — using it with my KX1 
and Norcal 40A.  But, I admit that they are hard to pick up and use for 
portable QRP ops anymore preferring the KX2 instead — I may never use them 
again unless I force myself to go backwards in time (aka nostalgia) and use a 
simpler KX1/Norcal 40A.

73, phil, K7PEH


> On Jul 18, 2017, at 8:34 PM, Dave Fugleberg  wrote:
> 
> I asked this exact question on this reflector in March, and got some good
> and useful replies. You can Google for that discussion on Nabble to see
> those technical answers.
> Bottom line is that both are fine tuners. I know I could have saved some
> money by using the T1 I already own, but in the end I opted to order my KX2
> with the KXAT2, and I'm glad I did. It works great, and it's more
> convenient than messing with an extra box and coax jumper.
> I think the choice comes down to how you want to spend your money, more
> than the merits of one tuner over the other, because either one will do the
> job very well. I will say that having the internal tuner and an internal
> battery makes the KX2 a real grab and go radio!
> I'm still using paddles that I already had, but I think the KXPD2 may be in
> my future...
> 73 de W0ZF
> On Tue, Jul 18, 2017 at 9:53 PM James Bennett  wrote:
> 
>> Thinking very seriously about purchasing a KX2. I have a T1 that I had
>> used a few years ago with another QRP rig. Obviously it will work with the
>> KX2, but I'm wondering how it compares in performance with the internal KX2
>> unit. Is the T1 as quick to find a match? Is it as quick to pull in a
>> memorized L/C combo when a band change happens? If there is a general
>> consensus that the T1 is on an equal level with the KXAT2, I can save my
>> $179 and use it for the KXPD2 paddle.
>> 
>> Comments?
>> 
>> Jim Bennett / W6JHB
>> Folsom, CA
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Re: [Elecraft] KX2AT2 vs T1 Tuner?

2017-07-18 Thread Dave Fugleberg 
I asked this exact question on this reflector in March, and got some good
and useful replies. You can Google for that discussion on Nabble to see
those technical answers.
Bottom line is that both are fine tuners. I know I could have saved some
money by using the T1 I already own, but in the end I opted to order my KX2
with the KXAT2, and I'm glad I did. It works great, and it's more
convenient than messing with an extra box and coax jumper.
I think the choice comes down to how you want to spend your money, more
than the merits of one tuner over the other, because either one will do the
job very well. I will say that having the internal tuner and an internal
battery makes the KX2 a real grab and go radio!
I'm still using paddles that I already had, but I think the KXPD2 may be in
my future...
73 de W0ZF
On Tue, Jul 18, 2017 at 9:53 PM James Bennett  wrote:

> Thinking very seriously about purchasing a KX2. I have a T1 that I had
> used a few years ago with another QRP rig. Obviously it will work with the
> KX2, but I'm wondering how it compares in performance with the internal KX2
> unit. Is the T1 as quick to find a match? Is it as quick to pull in a
> memorized L/C combo when a band change happens? If there is a general
> consensus that the T1 is on an equal level with the KXAT2, I can save my
> $179 and use it for the KXPD2 paddle.
>
> Comments?
>
> Jim Bennett / W6JHB
> Folsom, CA
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> Elecraft mailing list
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>
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[Elecraft] KX2AT2 vs T1 Tuner?

2017-07-18 Thread James Bennett 
Thinking very seriously about purchasing a KX2. I have a T1 that I had used a 
few years ago with another QRP rig. Obviously it will work with the KX2, but 
I'm wondering how it compares in performance with the internal KX2 unit. Is the 
T1 as quick to find a match? Is it as quick to pull in a memorized L/C combo 
when a band change happens? If there is a general consensus that the T1 is on 
an equal level with the KXAT2, I can save my $179 and use it for the KXPD2 
paddle.

Comments?

Jim Bennett / W6JHB
Folsom, CA
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