KX3 booster

[Petr, OK1RP/M0SIS]

Hi all,

I would like to ask if someone is tested or even using some 100W-150W
non-Elecraft booster for KX3?

I am looking for something cheap but reliable and found this small toy:
http://www.rmitaly.us/index.php?main_page=product_info&products_id=128

The big disadvantage is that T/R switching is RF VOX by relays (no QSK
available on CW)
and second complain lack of output band-pass filters bank.

Is there someone who has an experiences with that small amp from RM Italy
please?
(I do not want to remove my KPA500 from the rack...)
Any hints or tips are appreciated.

Of course I do not want to dissuade sb from purchasing KXPA100. It is the best
solution for our KX3. Just looking for an alternative solution for those with low
budget at that moment...

The clean sigs, QSK and protection is a must.


-----
73 - Petr, OK1RP
"Apple & Elecraft freak"
B:http://ok1rp.blogspot.com
G+:http://goo.gl/w3u2s9
G+: http://goo.gl/gP99xq
--
Sent from: http://elecraft.365791.n2.nabble.com/
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[Igor Sokolov-2]

About 5 years ago I had been using HLA300 with my KX3/ RF VOX was
disabled and PTT circuit was modified. Some LPF were available in HLA300
then. It worked OK until final transistors died. Could not find
identical substitute and had to resort to different transistors which
resulted in less output power (about 200W). Then I got KXPA100 and
forgot about HLA300.

73, Igor UA9CDC

05.11.2018 19:49, Petr, OK1RP/M0SIS пишет:

> Hi all,
>
> I would like to ask if someone is tested or even using some 100W-150W
> non-Elecraft booster for KX3?
>
> I am looking for something cheap but reliable and found this small toy:
> http://www.rmitaly.us/index.php?main_page=product_info&products_id=128
>
> The big disadvantage is that T/R switching is RF VOX by relays (no QSK
> available on CW)
> and second complain lack of output band-pass filters bank.
>
> Is there someone who has an experiences with that small amp from RM Italy
> please?
> (I do not want to remove my KPA500 from the rack...)
> Any hints or tips are appreciated.
>
>
>
> -----
> 73 - Petr, OK1RP
> "Apple & Elecraft freak"
> B:http://ok1rp.blogspot.com
> G+:http://goo.gl/w3u2s9
> G+: http://goo.gl/gP99xq
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
> ______________________________________________________________
> 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]
>

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[Jim Brown-10]

On 11/5/2018 6:49 AM, Petr, OK1RP/M0SIS wrote:
> I am looking for something cheap but reliable and found this small toy:
> http://www.rmitaly.us/index.php?main_page=product_info&products_id=128
>
> The big disadvantage is that T/R switching is RF VOX by relays (no QSK
> available on CW)
> and second complain lack of output band-pass filters bank.

That's why it's cheap -- a lot of the parts are missing. It's quite
normal for power amps to generate strong harmonics -- 5dB down is common
for the second harmonic -- so they must be filtered by an output
network. Solid state amps without tuners have networks that match to 50
ohms. Tube amps use either Pi or Pi-L networks that are tunable.

73, Jim K9YC


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[Petr, OK1RP/M0SIS]

Jim,

thanks for info. In fact I spurned the RM Italy for the same reason.

Maybe the solution is here:
http://www.jumaradio.com/juma-pa100/

...but Juma has not the kit in stock for long time.
Also the price is a bit above the budget.





-----
73 - Petr, OK1RP
"Apple & Elecraft freak"
B:http://ok1rp.blogspot.com
G+:http://goo.gl/w3u2s9
G+: http://goo.gl/gP99xq
--
Sent from: http://elecraft.365791.n2.nabble.com/
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[Petr, OK1RP/M0SIS]

https://pileupdx.com/product/xpa125-100w-solid-state-linear-amplifier/

The big complain is the lack of fast and clean QSK...



-----
73 - Petr, OK1RP
"Apple & Elecraft freak"
B:http://ok1rp.blogspot.com
G+:http://goo.gl/w3u2s9
G+: http://goo.gl/gP99xq
--
Sent from: http://elecraft.365791.n2.nabble.com/
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[Gordon LaPoint]

I have found the HardRock 50 amp/tuner kit to be great.  I have used it
with a K2 and Apache Labs ANAN-10e, both QRP rigs.
See: <https://www.hobbypcb.com/products/hf-radio/hardrock-50-hf-power-amp>
It is a kit, but relatively easy to build, especially compared to a K2,
or even a K1.

Gordon - N1MGO

On 11/8/18 5:16 AM, Petr, OK1RP/M0SIS wrote:

> https://pileupdx.com/product/xpa125-100w-solid-state-linear-amplifier/
>
> The big complain is the lack of fast and clean QSK...
>
>
>
> -----
> 73 - Petr, OK1RP
> "Apple & Elecraft freak"
> B:http://ok1rp.blogspot.com
> G+:http://goo.gl/w3u2s9
> G+: http://goo.gl/gP99xq
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
> ______________________________________________________________
> 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]

--
Gordon - N1MGO

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[Petr, OK1RP/M0SIS]

Gordon,

many thanks.
I know about it but it is 50W only. (at the best)
I am looking for something to give full standard 100W out as same as other
barefoot transceivers.
So idea was to have in portable QTH my KX3 reduced to clean 5W out boosted
to 100W out which is corresponding to conservative 13dB gain.  

In all cases thanks for hint.





-----
73 - Petr, OK1RP
"Apple & Elecraft freak"
B:http://ok1rp.blogspot.com
G+:http://goo.gl/w3u2s9
G+: http://goo.gl/gP99xq
--
Sent from: http://elecraft.365791.n2.nabble.com/
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[wayne burdick]

Petr,

The KXPA100 was designed specifically for this purpose. It is rugged, high performance, fully integrated with the KX3, and very reliable. With PIN diode T/R switching and a fanless design (very large heat sink), it's like having a 100 watt KX3. Also makes a great mobile amp, with fittings for trunk or under-seat mounting on both sides.

There are obviously cheaper amps on the market, but they all have compromises compared to the KXPA100. It takes a lot of parts and a solid design to do this job correctly.

73,
Wayne
N6KR

> On Nov 8, 2018, at 5:50 AM, Petr, OK1RP/M0SIS <[hidden email]> wrote:
>
> Gordon,
>
> many thanks.
> I know about it but it is 50W only. (at the best)
> I am looking for something to give full standard 100W out as same as other
> barefoot transceivers.
> So idea was to have in portable QTH my KX3 reduced to clean 5W out boosted
> to 100W out which is corresponding to conservative 13dB gain.  
>
> In all cases thanks for hint.
>
>

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