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KX2 Matching Power Amplifier

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Bert Garcia N8NN

KX2 Matching Power Amplifier

I'm enjoying my new KX2 transceiver! I'd like to see Elecraft make a
matching RF amplifier with about 35 watts output with 5 watts in. Include
an antenna tuner. Same size and shape and style as the KX2. Leave out the
SWR/wattmeter and the antenna switch. Use a manual bandswitch if it will
save money. 80-10 meters only. Call it the KXPA35.

Bert N8NN
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Irma & Linas(LY2H)

Re: KX2 Matching Power Amplifier

Nice idea! Before Elecraft steps-in to this PA market, I am using with
great success and pleasure the Chinese MiNiPa50,:)
AT 5-6 W in from the Kx2 it yealds clean and healthy 45-50 W output on the
80-20m bands and around 40W on higher bands. 6,6A current consumption at
13-14V. No 6 m , no ATU though. ( For the ATU I use the famous Elecrat T-1,
yes, it can stand up to 40 W , just do not tune at this power level, :)) At
the price of approx 150 USD it is very good value for money, I think.

73 de Linas LY2H

On 2017 bal. 6, kt at 16:34 Bert Garcia N8NN <[hidden email]> wrote:

> I'm enjoying my new KX2 transceiver! I'd like to see Elecraft make a
> matching RF amplifier with about 35 watts output with 5 watts in. Include
> an antenna tuner. Same size and shape and style as the KX2. Leave out the
> SWR/wattmeter and the antenna switch. Use a manual bandswitch if it will
> save money. 80-10 meters only. Call it the KXPA35.
>
> Bert N8NN
> ______________________________________________________________
> 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]
>

Ron Wilcox

Re: KX2 Matching Power Amplifier

qrp guys also makes a nice 50 watt amplifier that works great with the KX2,
has the cable for it, comes as kit for the fun of putting it together,
quality product as well

Today is a good day to have a Great Day!
73 Ron Wilcox KF7ZN

On Thu, Apr 6, 2017 at 8:18 AM, Irma & Linas(LY2H) <[hidden email]>
wrote:

> Nice idea! Before Elecraft steps-in to this PA market, I am using with
> great success and pleasure the Chinese MiNiPa50,:)
> AT 5-6 W in from the Kx2 it yealds clean and healthy 45-50 W output on the
> 80-20m bands and around 40W on higher bands. 6,6A current consumption at
> 13-14V. No 6 m , no ATU though. ( For the ATU I use the famous Elecrat T-1,
> yes, it can stand up to 40 W , just do not tune at this power level, :)) At
> the price of approx 150 USD it is very good value for money, I think.
>
> 73 de Linas LY2H
>
> On 2017 bal. 6, kt at 16:34 Bert Garcia N8NN <[hidden email]> wrote:
>
> > I'm enjoying my new KX2 transceiver! I'd like to see Elecraft make a
> > matching RF amplifier with about 35 watts output with 5 watts in.
> Include
> > an antenna tuner. Same size and shape and style as the KX2. Leave out
> the
> > SWR/wattmeter and the antenna switch. Use a manual bandswitch if it will
> > save money. 80-10 meters only. Call it the KXPA35.
> >
> > Bert N8NN
> > ______________________________________________________________
> > 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]
> >
> ______________________________________________________________
> 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]
>

Irma & Linas(LY2H)

Re: KX2 Matching Power Amplifier

It would be a good idea if the KX2 could be modified in order to get the
Band Data signal from the ACC socket, for as it is now it only provides
with the Key Out signal. I don't know though how the Band info is
arranged in the Kx2/KXPA100 combo, may be some RF sensor?

73 Linas LY2H

On 2017 bal. 6, kt at 17:29 Ron Wilcox <[hidden email]> wrote:

> qrp guys also makes a nice 50 watt amplifier that works great with the
> KX2, has the cable for it, comes as kit for the fun of putting it together,
> quality product as well
>
> Today is a good day to have a Great Day!
> 73 Ron Wilcox KF7ZN
>
> On Thu, Apr 6, 2017 at 8:18 AM, Irma & Linas(LY2H) <[hidden email]>
> wrote:
>
> Nice idea! Before Elecraft steps-in to this PA market, I am using with
> great success and pleasure the Chinese MiNiPa50,:)
> AT 5-6 W in from the Kx2 it yealds clean and healthy 45-50 W output on the
> 80-20m bands and around 40W on higher bands. 6,6A current consumption at
> 13-14V. No 6 m , no ATU though. ( For the ATU I use the famous Elecrat T-1,
> yes, it can stand up to 40 W , just do not tune at this power level, :)) At
> the price of approx 150 USD it is very good value for money, I think.
>
> 73 de Linas LY2H
>
> On 2017 bal. 6, kt at 16:34 Bert Garcia N8NN <[hidden email]> wrote:
>
> > I'm enjoying my new KX2 transceiver! I'd like to see Elecraft make a
> > matching RF amplifier with about 35 watts output with 5 watts in.
> Include
> > an antenna tuner. Same size and shape and style as the KX2. Leave out
> the
> > SWR/wattmeter and the antenna switch. Use a manual bandswitch if it will
> > save money. 80-10 meters only. Call it the KXPA35.
> >
> > Bert N8NN
> > ______________________________________________________________
> > 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]
> >
> ______________________________________________________________
> 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]
>
>
>

Bert Garcia N8NN

Re: KX2 Matching Power Amplifier

I’m hoping Elecraft will make the KXPA35 a bare-bones amplifier and leave out the band data capability to save cost. An antenna tuner is needed, but all the other do-dads drive up the cost and pretty soon you will have a KXPA100(minus) rather than a true KX2 companion.

I’m told the KXPA100 uses an rf sensor for band switching with the KX2.

Bert N8NN

From: Irma & Linas(LY2H) [mailto:[hidden email]]
Sent: Thursday, April 6, 2017 10:35 AM
To: Ron Wilcox <[hidden email]>
Cc: [hidden email]; [hidden email]
Subject: Re: [Elecraft] KX2 Matching Power Amplifier

It would be a good idea if the KX2 could be modified in order to get the Band Data signal from the ACC socket, for as it is now it only provides with the Key Out signal. I don't know though how the Band info is arranged in the Kx2/KXPA100 combo, may be some RF sensor?

73 Linas LY2H

On 2017 bal. 6, kt at 17:29 Ron Wilcox <[hidden email] <mailto:[hidden email]> > wrote:

qrp guys also makes a nice 50 watt amplifier that works great with the KX2, has the cable for it, comes as kit for the fun of putting it together, quality product as well

Today is a good day to have a Great Day!

73 Ron Wilcox KF7ZN

On Thu, Apr 6, 2017 at 8:18 AM, Irma & Linas(LY2H) <[hidden email] <mailto:[hidden email]> > wrote:

Nice idea! Before Elecraft steps-in to this PA market, I am using with
great success and pleasure the Chinese MiNiPa50,:)
AT 5-6 W in from the Kx2 it yealds clean and healthy 45-50 W output on the
80-20m bands and around 40W on higher bands. 6,6A current consumption at
13-14V. No 6 m , no ATU though. ( For the ATU I use the famous Elecrat T-1,
yes, it can stand up to 40 W , just do not tune at this power level, :)) At
the price of approx 150 USD it is very good value for money, I think.

73 de Linas LY2H

On 2017 bal. 6, kt at 16:34 Bert Garcia N8NN <[hidden email] <mailto:[hidden email]> > wrote:

> I'm enjoying my new KX2 transceiver! I'd like to see Elecraft make a
> matching RF amplifier with about 35 watts output with 5 watts in. Include
> an antenna tuner. Same size and shape and style as the KX2. Leave out the
> SWR/wattmeter and the antenna switch. Use a manual bandswitch if it will
> save money. 80-10 meters only. Call it the KXPA35.
>
> Bert N8NN
> ______________________________________________________________
> 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
> 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
Please help support this email list: http://www.qsl.net/donate.html

Message delivered to [hidden email] <mailto:[hidden email]>

______________________________________________________________
Elecraft mailing list
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Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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Message delivered to [hidden email]

Ron Wilcox

Re: KX2 Matching Power Amplifier

In reply to this post by Ron Wilcox

sorry, it is hobby pc that makes the amplifier, here is their website, and
it is the hardrock 50., https://www.hobbypcb.com/

Today is a good day to have a Great Day!
73 Ron Wilcox KF7ZN

On Thu, Apr 6, 2017 at 8:53 AM, Bert Garcia N8NN <[hidden email]> wrote:

> Ron – I couldn’t find the amplifier on the QRP Guys website. Do you have
> a link? I bought their iambic paddle recently.
>
>
>
> Bert N8NN
>
>
>
> *From:* Ron Wilcox [mailto:[hidden email]]
> *Sent:* Thursday, April 6, 2017 10:29 AM
> *To:* Irma & Linas(LY2H) <[hidden email]>
> *Cc:* [hidden email]; [hidden email]
> *Subject:* Re: [Elecraft] KX2 Matching Power Amplifier
>
>
>
> qrp guys also makes a nice 50 watt amplifier that works great with the
> KX2, has the cable for it, comes as kit for the fun of putting it together,
> quality product as well
>
>
> Today is a good day to have a Great Day!
>
> 73 Ron Wilcox KF7ZN
>
>
>
> On Thu, Apr 6, 2017 at 8:18 AM, Irma & Linas(LY2H) <[hidden email]>
> wrote:
>
> Nice idea! Before Elecraft steps-in to this PA market, I am using with
> great success and pleasure the Chinese MiNiPa50,:)
> AT 5-6 W in from the Kx2 it yealds clean and healthy 45-50 W output on the
> 80-20m bands and around 40W on higher bands. 6,6A current consumption at
> 13-14V. No 6 m , no ATU though. ( For the ATU I use the famous Elecrat T-1,
> yes, it can stand up to 40 W , just do not tune at this power level, :)) At
> the price of approx 150 USD it is very good value for money, I think.
>
> 73 de Linas LY2H
>
> On 2017 bal. 6, kt at 16:34 Bert Garcia N8NN <[hidden email]> wrote:
>
> > I'm enjoying my new KX2 transceiver! I'd like to see Elecraft make a
> > matching RF amplifier with about 35 watts output with 5 watts in.
> Include
> > an antenna tuner. Same size and shape and style as the KX2. Leave out
> the
> > SWR/wattmeter and the antenna switch. Use a manual bandswitch if it will
> > save money. 80-10 meters only. Call it the KXPA35.
> >
> > Bert N8NN
> > ______________________________________________________________
> > 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]
> >
> ______________________________________________________________
> 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]
>
>
>

Mike Morrow-3

Re: KX2 Matching Power Amplifier

In reply to this post by Bert Garcia N8NN

> I'm enjoying my new KX2 transceiver! I'd like to see Elecraft make a
> matching RF amplifier with about 35 watts output with 5 watts in.

Since the KX2 runs 10 watts out, more or less, you're asking for external gear to run only 5 dB better. I wouldn't consider something like that for even a moment. The existing 100 watt amp is likely the minimum increment that would be almost worth the trouble.

A subsequent post about using a T1 ATU on the output of a 40 watt external amp seems ill-advised, especially for such minimal practical benefit.

I'd prefer to see an enhanced KX3HP (not KX2) with KXAT3HP capable (only with stout 14 vdc external power) of the 35 watts you seek. It would sell as a unified package that is the buyer's only choice, but not as multiple components. Still ... the benefit for the effort would not be there.

Mike / KK5F
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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Please help support this email list: http://www.qsl.net/donate.html
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Bert Garcia N8NN

Re: KX2 Matching Power Amplifier

In reply to this post by Ron Wilcox

Ron – Found it! Very impressive amplifier for my KX2. Guess I’ll build one while waiting for the Elecraft KXPA35 (or maybe the KXPA50…?). The Hardrock 50 has a lot more features than I was looking for, but they are all useful. Thanks for the help. Again, very impressive!

Bert N8NN

From: Ron Wilcox [mailto:[hidden email]]
Sent: Thursday, April 6, 2017 11:04 AM
To: [hidden email]; [hidden email]
Subject: Re: [Elecraft] KX2 Matching Power Amplifier

sorry, it is hobby pc that makes the amplifier, here is their website, and it is the hardrock 50., https://www.hobbypcb.com/

Today is a good day to have a Great Day!

73 Ron Wilcox KF7ZN

On Thu, Apr 6, 2017 at 8:53 AM, Bert Garcia N8NN <[hidden email] <mailto:[hidden email]> > wrote:

Ron – I couldn’t find the amplifier on the QRP Guys website. Do you have a link? I bought their iambic paddle recently.

Bert N8NN

From: Ron Wilcox [mailto:[hidden email] <mailto:[hidden email]> ]
Sent: Thursday, April 6, 2017 10:29 AM
To: Irma & Linas(LY2H) <[hidden email] <mailto:[hidden email]> >
Cc: [hidden email] <mailto:[hidden email]> ; [hidden email] <mailto:[hidden email]>
Subject: Re: [Elecraft] KX2 Matching Power Amplifier

qrp guys also makes a nice 50 watt amplifier that works great with the KX2, has the cable for it, comes as kit for the fun of putting it together, quality product as well

Today is a good day to have a Great Day!

73 Ron Wilcox KF7ZN

On Thu, Apr 6, 2017 at 8:18 AM, Irma & Linas(LY2H) <[hidden email] <mailto:[hidden email]> > wrote:

Nice idea! Before Elecraft steps-in to this PA market, I am using with
great success and pleasure the Chinese MiNiPa50,:)
AT 5-6 W in from the Kx2 it yealds clean and healthy 45-50 W output on the
80-20m bands and around 40W on higher bands. 6,6A current consumption at
13-14V. No 6 m , no ATU though. ( For the ATU I use the famous Elecrat T-1,
yes, it can stand up to 40 W , just do not tune at this power level, :)) At
the price of approx 150 USD it is very good value for money, I think.

73 de Linas LY2H

On 2017 bal. 6, kt at 16:34 Bert Garcia N8NN <[hidden email] <mailto:[hidden email]> > wrote:

> I'm enjoying my new KX2 transceiver! I'd like to see Elecraft make a
> matching RF amplifier with about 35 watts output with 5 watts in. Include
> an antenna tuner. Same size and shape and style as the KX2. Leave out the
> SWR/wattmeter and the antenna switch. Use a manual bandswitch if it will
> save money. 80-10 meters only. Call it the KXPA35.
>
> Bert N8NN
> ______________________________________________________________
> 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
> 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
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]

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]

Ron Wilcox

Re: KX2 Matching Power Amplifier

Well glad it is going to work for you. I bought it and the tuner for mobile
work. I did not want to spend a fortune as my mobile time is fairly random,
but found that my wonderful KX2 was just not being heard from the car when
I tried to put out counties or make contacts. I could hear a lot but was
not being heard. Good luck.

Today is a good day to have a Great Day!
73 Ron Wilcox KF7ZN

On Thu, Apr 6, 2017 at 10:54 AM, Bert Garcia N8NN <[hidden email]>
wrote:

> Ron – Found it! Very impressive amplifier for my KX2. Guess I’ll build
> one while waiting for the Elecraft KXPA35 (or maybe the KXPA50…?). The
> Hardrock 50 has a lot more features than I was looking for, but they are
> all useful. Thanks for the help. Again, very impressive!
>
>
>
> Bert N8NN
>
>
>
> *From:* Ron Wilcox [mailto:[hidden email]]
> *Sent:* Thursday, April 6, 2017 11:04 AM
> *To:* [hidden email]; [hidden email]
> *Subject:* Re: [Elecraft] KX2 Matching Power Amplifier
>
>
>
> sorry, it is hobby pc that makes the amplifier, here is their website, and
> it is the hardrock 50., https://www.hobbypcb.com/
>
>
> Today is a good day to have a Great Day!
>
> 73 Ron Wilcox KF7ZN
>
>
>
> On Thu, Apr 6, 2017 at 8:53 AM, Bert Garcia N8NN <[hidden email]>
> wrote:
>
> Ron – I couldn’t find the amplifier on the QRP Guys website. Do you have
> a link? I bought their iambic paddle recently.
>
>
>
> Bert N8NN
>
>
>
> *From:* Ron Wilcox [mailto:[hidden email]]
> *Sent:* Thursday, April 6, 2017 10:29 AM
> *To:* Irma & Linas(LY2H) <[hidden email]>
> *Cc:* [hidden email]; [hidden email]
> *Subject:* Re: [Elecraft] KX2 Matching Power Amplifier
>
>
>
> qrp guys also makes a nice 50 watt amplifier that works great with the
> KX2, has the cable for it, comes as kit for the fun of putting it together,
> quality product as well
>
>
> Today is a good day to have a Great Day!
>
> 73 Ron Wilcox KF7ZN
>
>
>
> On Thu, Apr 6, 2017 at 8:18 AM, Irma & Linas(LY2H) <[hidden email]>
> wrote:
>
> Nice idea! Before Elecraft steps-in to this PA market, I am using with
> great success and pleasure the Chinese MiNiPa50,:)
> AT 5-6 W in from the Kx2 it yealds clean and healthy 45-50 W output on the
> 80-20m bands and around 40W on higher bands. 6,6A current consumption at
> 13-14V. No 6 m , no ATU though. ( For the ATU I use the famous Elecrat T-1,
> yes, it can stand up to 40 W , just do not tune at this power level, :)) At
> the price of approx 150 USD it is very good value for money, I think.
>
> 73 de Linas LY2H
>
> On 2017 bal. 6, kt at 16:34 Bert Garcia N8NN <[hidden email]> wrote:
>
> > I'm enjoying my new KX2 transceiver! I'd like to see Elecraft make a
> > matching RF amplifier with about 35 watts output with 5 watts in.
> Include
> > an antenna tuner. Same size and shape and style as the KX2. Leave out
> the
> > SWR/wattmeter and the antenna switch. Use a manual bandswitch if it will
> > save money. 80-10 meters only. Call it the KXPA35.
> >
> > Bert N8NN
> > ______________________________________________________________
> > 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]
> >
> ______________________________________________________________
> 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]
>
>
>
>
>

Irma & Linas(LY2H)

Re: KX2 Matching Power Amplifier

In reply to this post by Mike Morrow-3

No it doesn't, at least for the engineers who created this little tuner.
Please check the Elecraft T-1 FAQ, :)

*Q: What’s the highest power level the T1 can handle? Can I use my 30-40
watt amplifier?*

*A:* The T1 is rated at 20 W SSB/CW and 10 W FM/AM/digital modes. However,
to ensure that the design is rugged, we did stress-testing at 100 watts
(very briefly–don’t do this on purpose). Things got very warm during these
tests, but no damage occurred. We also used the T1 for an extended period
in SSB and CW modes at 40 watts to simulate the emergency use of
backpacking amplifiers. Again, this did not damage the tuner. But just to
be safe, we’re sticking with our 20 W rating."

73 Linas LY2H
On <<<2017 bal. 6, kt at 19:34 Mike Morrow <[hidden email]> wrote:

>
>
>
> A subsequent post about using a T1 ATU on the output of a 40 watt external
> amp seems ill-advised, especially for such minimal practical benefit.
>
>
>
> Mike / KK5F>>
> ______________________________________________________________
> 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]
>

Bert Garcia N8NN

Re: KX2 Matching Power Amplifier

In reply to this post by Mike Morrow-3

The KX2 is recommended to operate at 5 watts and below for digital modes. When operating QRP, you are often at the noise level on the receiving end, especially with compromise antennas. Any improvement, even 5 dB, will make the difference between being heard or not. My primary design goal for a KXPA35 is low cost, thus I suggest a modest power level, no SWR/wattmeter, a manual bandswitch, and any other cost savings that can be had. Those wanting a full gallon of 100 watts with all the cool features Elecraft has to offer can opt for the KXPA100, a truly fine amplifier in all respects. Rather than a fancy pair of shoes, I'm just looking for a pair of flip-flops.

Bert N8NN

-----Original Message-----
From: Mike Morrow [mailto:[hidden email]]
Sent: Thursday, April 6, 2017 12:33 PM
To: [hidden email]; [hidden email]
Subject: Re: [Elecraft] KX2 Matching Power Amplifier

> I'm enjoying my new KX2 transceiver! I'd like to see Elecraft make a
> matching RF amplifier with about 35 watts output with 5 watts in.

Since the KX2 runs 10 watts out, more or less, you're asking for external gear to run only 5 dB better. I wouldn't consider something like that for even a moment. The existing 100 watt amp is likely the minimum increment that would be almost worth the trouble.

A subsequent post about using a T1 ATU on the output of a 40 watt external amp seems ill-advised, especially for such minimal practical benefit.

I'd prefer to see an enhanced KX3HP (not KX2) with KXAT3HP capable (only with stout 14 vdc external power) of the 35 watts you seek. It would sell as a unified package that is the buyer's only choice, but not as multiple components. Still ... the benefit for the effort would not be there.

Mike / KK5F

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Fred Moore-2

Re: KX2 Matching Power Amplifier

In reply to this post by Ron Wilcox

I am also using the hardrock 50, works well have the internal atu as
well, I think the kit was 479 or something like that, took about 6 hours
to build, nice kit. works well, but don't hardly turn it on 5 watts CW
gets me where I want to go 100% of the time.. Fred

Fred Moore
email: [hidden email]
[hidden email]
phone: 321-217-8699

On 4/6/17 11:03 AM, Ron Wilcox wrote:

> sorry, it is hobby pc that makes the amplifier, here is their website, and
> it is the hardrock 50., https://www.hobbypcb.com/
>
> Today is a good day to have a Great Day!
> 73 Ron Wilcox KF7ZN
>
> On Thu, Apr 6, 2017 at 8:53 AM, Bert Garcia N8NN <[hidden email]> wrote:
>
>> Ron – I couldn’t find the amplifier on the QRP Guys website. Do you have
>> a link? I bought their iambic paddle recently.
>>
>>
>>
>> Bert N8NN
>>
>>
>>
>> *From:* Ron Wilcox [mailto:[hidden email]]
>> *Sent:* Thursday, April 6, 2017 10:29 AM
>> *To:* Irma & Linas(LY2H) <[hidden email]>
>> *Cc:* [hidden email]; [hidden email]
>> *Subject:* Re: [Elecraft] KX2 Matching Power Amplifier
>>
>>
>>
>> qrp guys also makes a nice 50 watt amplifier that works great with the
>> KX2, has the cable for it, comes as kit for the fun of putting it together,
>> quality product as well
>>
>>
>> Today is a good day to have a Great Day!
>>
>> 73 Ron Wilcox KF7ZN
>>
>>
>>
>> On Thu, Apr 6, 2017 at 8:18 AM, Irma & Linas(LY2H) <[hidden email]>
>> wrote:
>>
>> Nice idea! Before Elecraft steps-in to this PA market, I am using with
>> great success and pleasure the Chinese MiNiPa50,:)
>> AT 5-6 W in from the Kx2 it yealds clean and healthy 45-50 W output on the
>> 80-20m bands and around 40W on higher bands. 6,6A current consumption at
>> 13-14V. No 6 m , no ATU though. ( For the ATU I use the famous Elecrat T-1,
>> yes, it can stand up to 40 W , just do not tune at this power level, :)) At
>> the price of approx 150 USD it is very good value for money, I think.
>>
>> 73 de Linas LY2H
>>
>> On 2017 bal. 6, kt at 16:34 Bert Garcia N8NN <[hidden email]> wrote:
>>
>>> I'm enjoying my new KX2 transceiver! I'd like to see Elecraft make a
>>> matching RF amplifier with about 35 watts output with 5 watts in.
>> Include
>>> an antenna tuner. Same size and shape and style as the KX2. Leave out
>> the
>>> SWR/wattmeter and the antenna switch. Use a manual bandswitch if it will
>>> save money. 80-10 meters only. Call it the KXPA35.
>>>
>>> Bert N8NN
>>> ______________________________________________________________
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>>>
>>> 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]
>>>
>> ______________________________________________________________
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>>
> ______________________________________________________________
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Jim Brown-10

Re: KX2 Matching Power Amplifier

In reply to this post by Bert Garcia N8NN

In an ideal world, perhaps. But much of the limit on what you can work
with 5W is not QRM, but rather the noise in the other station's receiver
(man-made and static) and the quality of his/her RX antennas.

I can give MANY examples of stations whose TX signal far out reach their
RX capability. A club station active in 160M contests is hard to work
with 1.5 kW and a full size vertical with a tower as a passive
reflector, whereas I've worked all the W1 and W2 states except VT with
5W on that band. Several years ago, I had a JT65 sked with an ND
station. He was running about 30W. and WSJT software said he was 16 dB
below my noise (the latest WSJT-X software can decode signals as weak as
28 dB below the noise floor). I called with barefoot at about 50W. No
response. Over about 10 minutes, I increased my TX power in 3 dB steps
(using the KPA500). He finally heard me at 400W. And it's well known
that stations in the tropics and those in summer seasons tend to have a
lot more static than those at higher latitudes and in winter seasons.

73, Jim K9YC

On Thu,4/6/2017 1:46 PM, Ron D'Eau Claire wrote:
> For
> example, if everyone ran 5 W maximum you'd be able to work almost all the
> stations you hear with the KX2 "barefoot".

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Elecraft mailing list

Re: KX2 Matching Power Amplifier

In reply to this post by Bert Garcia N8NN

I've been using my old HF-PACKER amp I've had about 7 yrs with the KX2.
2 watts in gives me 40watts out for portable ops here in Florida.
I use a Buddipole 5Ah battery for the amp and the internal battery in the KX2.
I was on the air every day for almost a week at Flamingo in the Everglades last month chasing SOTA activators, never ran either battery down.
Virgil has a new mini HF-packer amp for SOTA activators out now, 35/40 watts out on battery.
I would buy an Elecraft small amp if they ever produced one !

Ed
N7EDK
Bradenton, Florida

Sent from my iPhone

> On Apr 6, 2017, at 09:32, Bert Garcia N8NN <[hidden email]> wrote:
>
> I'm enjoying my new KX2 transceiver! I'd like to see Elecraft make a
> matching RF amplifier with about 35 watts output with 5 watts in. Include
> an antenna tuner. Same size and shape and style as the KX2. Leave out the
> SWR/wattmeter and the antenna switch. Use a manual bandswitch if it will
> save money. 80-10 meters only. Call it the KXPA35.
>
> Bert N8NN
>

Hall, Nathon

KX2 Matching Power Amplifier

In reply to this post by Bert Garcia N8NN

I second this. Except that said amplifier should have an additional option: a modular high-capacity battery pack.

Strung together, the whole ensemble would make a mini-manpack radio :)

--
Nathon Hall VE7ETS
SOTA VE7 (British Columbia) Association Manager
[hidden email]

--

Date: Thu, 6 Apr 2017 09:32:23 -0400

From: "Bert Garcia N8NN" <[hidden email]<mailto:[hidden email]>>

To: <[hidden email]<mailto:[hidden email]>>

Subject: [Elecraft] KX2 Matching Power Amplifier

Message-ID: <004401d2aeda$395dfc50$ac19f4f0$@earthlink.net<mailto:004401d2aeda$395dfc50$ac19f4f0$@earthlink.net>>

Content-Type: text/plain; charset="us-ascii"

I'm enjoying my new KX2 transceiver! I'd like to see Elecraft make a

matching RF amplifier with about 35 watts output with 5 watts in. Include

an antenna tuner. Same size and shape and style as the KX2. Leave out the

SWR/wattmeter and the antenna switch. Use a manual bandswitch if it will

save money. 80-10 meters only. Call it the KXPA35.

Bert N8NN

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Elecraft mailing list

Re: KX2 Matching Power Amplifier

In reply to this post by Elecraft mailing list

blockquote, div.yahoo_quoted { margin-left: 0 !important; border-left:1px #715FFA solid !important; padding-left:1ex !important; background-color:white !important; } I wrote the following e-mail to Virgil, K5OOR, on 17 March. It was my first outing with the miniHFPA (http://www.hfprojects.com). With 5 watts from my KX3 I got 50 watts out on 40 meters. On 80 meters I'm getting 64 watts output. In less than favorable conditions I made a 9000 mile QSO. I used an Elecraft T1 Autotuner with no problems.
David A RutledgeAL5M

Virgil,

I'm using my KX3 with the miniHFPA in New Braunfels while visiting my inlaws. My antenna is a 53' wire in an inverted L configuration and I'm using batteries. I just made a QSO with ZS6CCY in South Africa in less than ideal conditions. Lots of noise. The miniHFPA made the difference. Earlier today I made a QSO with 5J0NA on San Andres and Providencia. I am quite pleased with this lightweight wonder!
73,DavidAL5M

Sent from Yahoo Mail for iPhone

On Thursday, April 6, 2017, 4:55 PM, Edward Kacura via Elecraft <[hidden email]> wrote:

I've been using my old HF-PACKER amp I've had about 7 yrs with the KX2.
2 watts in gives me 40watts out for portable ops here in Florida.
I use a Buddipole 5Ah battery for the amp and the internal battery in the KX2.
I was on the air every day for almost a week at Flamingo in the Everglades last month chasing SOTA activators, never ran either battery down.
Virgil has a new mini HF-packer amp for SOTA activators out now, 35/40 watts out on battery.
I would buy an Elecraft small amp if they ever produced one !

Ed
N7EDK
Bradenton, Florida

Sent from my iPhone

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