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K3/P3/expert 1.3KA

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K3/P3/expert 1.3KA

I have a question?
I have a K-3/P-3 with a Expert 1.3 k amp. Due to the low swr cut off point
of the Expert amp (1.7) and the high swr of my antenna (2.3) I am looking
for a Antenna Tuner. I have selected a Palstar HF Auto. My question is what
will the Expert amp do when the tuner is tuning. I was under the
impression that since the connection between the K3/P3 and the amp and the tuner are
all 50 ohms, and there fore a 1:1 swr the amp would see a match of 1:1
and there would be no reduction in power due to the antenna mismatch. Is this
correct.

Gerald Muller K9GEM
[hidden email]
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Jim Brown-10

Re: K3/P3/expert 1.3KA

On Thu,1/19/2017 1:59 PM, Jerry Muller via Elecraft wrote:
> I am looking
> for a Antenna Tuner. I have selected a Palstar HF Auto.

Why an automatic tuner? The amp has an auto-tuner, and the two are
unlikely to play well together. Instead, I'd look at a good manual tuner
like the Ten Tec 238. I've owned several of them and find them to be
good performers. So did ARRL Labs when they tested them many years ago.

Ten Tec has been sold a couple of times and new 238s are probably no
longer available, but used 238s are usually available on the used
market. Best bet are the B and C models, which have a vernier readout
for the inductor, as opposed to a dial cord in the older models. Expect
to pay about $400 for the B or C, $300-350 for the older units. The 229
is electrically and mechanically the same as the older 238s, but in a
cabinet that matches older Ten Tec rigs.

To use this tuner in your station, set the SPE to bypass mode, tune it
for the bands where you operate and log the settings. Then put the SPE
tuner back in line in auto mode and let the auto tuner do its thing to
cover the band(s) as you QSY.

73, Jim K9YC

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w0mu

Re: K3/P3/expert 1.3KA

I have the Palstar manual tuner and it is a beast! AT4K I think it can
tune a bed spring.

On 1/19/2017 3:20 PM, Jim Brown wrote:

> On Thu,1/19/2017 1:59 PM, Jerry Muller via Elecraft wrote:
>> I am looking
>> for a Antenna Tuner. I have selected a Palstar HF Auto.
>
> Why an automatic tuner? The amp has an auto-tuner, and the two are
> unlikely to play well together. Instead, I'd look at a good manual
> tuner like the Ten Tec 238. I've owned several of them and find them
> to be good performers. So did ARRL Labs when they tested them many
> years ago.
>
> Ten Tec has been sold a couple of times and new 238s are probably no
> longer available, but used 238s are usually available on the used
> market. Best bet are the B and C models, which have a vernier readout
> for the inductor, as opposed to a dial cord in the older models.
> Expect to pay about $400 for the B or C, $300-350 for the older
> units. The 229 is electrically and mechanically the same as the older
> 238s, but in a cabinet that matches older Ten Tec rigs.
>
> To use this tuner in your station, set the SPE to bypass mode, tune it
> for the bands where you operate and log the settings. Then put the SPE
> tuner back in line in auto mode and let the auto tuner do its thing to
> cover the band(s) as you QSY.
>
> 73, Jim K9YC
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

Igor Sokolov-2

Re: K3/P3/expert 1.3KA

In reply to this post by Jim Brown-10

Not all of Expert 1.3 are sold with internal antenna tuner. There are
amps without it. If I were in Jerry's situation I would purchase
internal antenna tuner from Expert for the sake of integration and speed.

73, Igor UA9CDC

20.01.2017 3:20, Jim Brown пишет:

Ignacy

Re: K3/P3/expert 1.3KA

In reply to this post by Elecraft mailing list

With 1.3k I use an internal tuner. It allows for instant QSY and instant antenna changes.

I have Expert 2k as well. 4 antennas with SWR< 3:1 are attached directly, and a dipole fed by ladderline is attached via MFJ-998. With MFJ-998 pretuned, QSY takes a second.

Ignacy, NO9E

Elecraft mailing list

Re: K3/P3/expert 1.3KA

In reply to this post by Igor Sokolov-2

I've got the 1.3K with the internal tuner and am very dissatisfied with the capability of the tuner. If I had it to do over again, I would would get the amp WITHOUT the internal tuner. It won't tune certain loads (e.g my beam on the low end of 20 where the SWR is only 2.1/! and on 30 meters with my vertical (same situation), and I also find it there are many occasions where it won't tune down to a 1:1 or close, but stays up around 1.6 which is about the limit the amp will tolerate. The tuner REALLY needs some work - but then maybe my tuner is defective. BTW, my KAT 500 had no trouble matching ANY of these conditions.
73,
Bob/AA6VB

From: Igor Sokolov <[hidden email]>
To: [hidden email]
Sent: Thursday, January 19, 2017 9:44 PM
Subject: Re: [Elecraft] K3/P3/expert 1.3KA

Not all of Expert 1.3 are sold with internal antenna tuner. There are
amps without it. If I were in Jerry's situation I would purchase
internal antenna tuner from Expert for the sake of integration and speed.

73, Igor UA9CDC

20.01.2017 3:20, Jim Brown пишет:

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Igor Sokolov-2

Re: K3/P3/expert 1.3KA

Bob, I think you are right. Your tuner is defective. There are two more
owners of 1.3k-FA live next to me . None of us has no issues. Tuners
work well up to 3 :1 SWR and beyond that if you tune them manually. I
have inverted L for 80m band and with tuner I can cover from 3.5 to 3.8
even though SWR is up to 5:1 some frequencies.

73, Igor UA9CDC

21.01.2017 22:00, Chortek Bob пишет:

> I've got the 1.3K with the internal tuner and am very dissatisfied
> with the capability of the tuner. If I had it to do over again, I
> would would get the amp WITHOUT the internal tuner. It won't tune
> certain loads (e.g my beam on the low end of 20 where the SWR is only
> 2.1/! and on 30 meters with my vertical (same situation), and I also
> find it there are many occasions where it won't tune down to a 1:1 or
> close, but stays up around 1.6 which is about the limit the amp will
> tolerate. The tuner REALLY needs some work - but then maybe my tuner
> is defective. BTW, my KAT 500 had no trouble matching ANY of these
> conditions.
>
> 73,
>
> Bob/AA6VB
>
>
> ------------------------------------------------------------------------
> *From:* Igor Sokolov <[hidden email]>
> *To:* [hidden email]
> *Sent:* Thursday, January 19, 2017 9:44 PM
> *Subject:* Re: [Elecraft] K3/P3/expert 1.3KA
>
> Not all of Expert 1.3 are sold with internal antenna tuner. There are
> amps without it. If I were in Jerry's situation I would purchase
> internal antenna tuner from Expert for the sake of integration and speed.
>
> 73, Igor UA9CDC
>
>
> 20.01.2017 3:20, Jim Brown пишет:
> > On Thu,1/19/2017 1:59 PM, Jerry Muller via Elecraft wrote:
> >> I am looking
> >> for a Antenna Tuner. I have selected a Palstar HF Auto.
> >
> > Why an automatic tuner? The amp has an auto-tuner, and the two are
> > unlikely to play well together. Instead, I'd look at a good manual
> > tuner like the Ten Tec 238. I've owned several of them and find them
> > to be good performers. So did ARRL Labs when they tested them many
> > years ago.
> >
> > Ten Tec has been sold a couple of times and new 238s are probably no
> > longer available, but used 238s are usually available on the used
> > market. Best bet are the B and C models, which have a vernier readout
> > for the inductor, as opposed to a dial cord in the older models.
> > Expect to pay about $400 for the B or C, $300-350 for the older
> > units. The 229 is electrically and mechanically the same as the older
> > 238s, but in a cabinet that matches older Ten Tec rigs.
> >
> > To use this tuner in your station, set the SPE to bypass mode, tune it
> > for the bands where you operate and log the settings. Then put the SPE
> > tuner back in line in auto mode and let the auto tuner do its thing to
> > cover the band(s) as you QSY.
> >
> > 73, Jim K9YC
> >
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email] <mailto:[hidden email]>
> >
> > This list hosted by: http://www.qsl.net <http://www.qsl.net/>
> > Please help support this email list: http://www.qsl.net/donate.html
> > Message delivered to [hidden email] <mailto:[hidden email]>
>
> > .
> >
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email] <mailto:[hidden email]>
>
> This list hosted by: http://www.qsl.net <http://www.qsl.net/>
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email] <mailto:[hidden email]>
>
>

Ignacy

Re: K3/P3/expert 1.3KA

My 2k-fa always matches with at least 25 W. 1.3k sometimes goes up and down and needs a second tune but does it at 4 W, which is great for KX3.

Ignacy, NO9E