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KPA1500

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Elecraft mailing list

Re: KPA1500

I think Elecraft, being in close proximity to Apple, has learned, as
apple has, how to keep its new products secret. Unless you could sneak
into Wayne's home laboratory, we will never know what he's cooking up
until the big reveal.

I would definitely be on-board for a bigger Elecraft amp. Normally, I
wouldn't even consider another amp beyond the KPA500. But if it's
Elecraft - I'm in!

73, Doug -- K0DXV

On 2/19/2016 7:58 AM, [hidden email] wrote:

> While a KPA-1500 or even a KPA-750 would be nice, Elecraft obviously has
> their reasons for not manufacturing it. Perhaps well designed high power
> SS amps are just too costly. Acom announced the 1200S last year and I have
> yet to see one at a US dealer.
>
> John KK9A
>
> >From Gary vk1zzgary
> Fri Feb 19 10:07:10 EST 2016
>
> Well the management have stated they will not be doing it so I guess you
> are going to need a looong list
>
> ______________________________________________________________
> 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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> Message delivered to [hidden email]
>

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Petr, OK1RP/M0SIS

Re: KPA1500

In reply to this post by john@kk9a.com

Hi John,
the Acom 1200S has not QSK so it is out of game unfortunately...
73 - Petr, OK1RP

73 - Petr, OK1RP
"Apple & Elecraft freak"
B:http://ok1rp.blogspot.com
MeWe: https://bit.ly/2HGPoDx
MeWe: https://bit.ly/2FmwvDt

Brian Broggie-2

Re: KPA1500

In reply to this post by Elecraft mailing list

If you took the entire population of Earth and placed them in line to
get a KPA1500, you know who would be at the very end of that line?

Wayne Burdick.

That man is QRP all the way. Eric, OTOH, is a full legal limit guy, so
I'm sure the KPA500 is the compromise those two worked out.

73,
Brian, W6FVI

On 2/19/2016 9:51 AM, Doug Person via Elecraft wrote:

> I think Elecraft, being in close proximity to Apple, has learned, as
> apple has, how to keep its new products secret. Unless you could
> sneak into Wayne's home laboratory, we will never know what he's
> cooking up until the big reveal.
>
> I would definitely be on-board for a bigger Elecraft amp. Normally, I
> wouldn't even consider another amp beyond the KPA500. But if it's
> Elecraft - I'm in!
>
> 73, Doug -- K0DXV
>
> On 2/19/2016 7:58 AM, [hidden email] wrote:
>> While a KPA-1500 or even a KPA-750 would be nice, Elecraft obviously has
>> their reasons for not manufacturing it. Perhaps well designed high power
>> SS amps are just too costly. Acom announced the 1200S last year and I
>> have
>> yet to see one at a US dealer.
>>
>> John KK9A
>>
>> >From Gary vk1zzgary
>> Fri Feb 19 10:07:10 EST 2016
>>
>> Well the management have stated they will not be doing it so I guess you
>> are going to need a looong list
>>
>> ______________________________________________________________
>> 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
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Guy Olinger K2AV

Re: KPA1500

In reply to this post by Clay Autery

Lots of possible reasons why Elecraft might not do a 1500, but specifically
price breaks and unwillingness to adopt a product that from other
manufacturers has proven problematic at our price range for well understood
reasons. Elecraft has been conservative about introductions, and that plays
well for what they *do* produce.

Ignore the boo-bird gallery on this reflector and note long term
performance of other ham manufacturers including near death brushes or full
on encounters with bankruptcy. Elecraft *grew* their business during the
great recession. Financially stable and responsive to customers with great
products. Hard to find combo, generally.

Personally I'll let 'em do whatever they want (as if I could really affect
that). They *might* put out a 1500, which I would buy in a heartbeat for
the integration. But it wouldn't be a hacksaw job and it wouldn't put their
balance sheet near the edge, and it *would* have gotten past all those
issues that 1500's seem to be dogged with.

73, Guy

On Friday, February 19, 2016, Clay Autery <[hidden email]> wrote:

> Shhhhh... We're starting a ground-swell... <grin>
>
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Clay Autery

Re: KPA1500

I realize and agree with all of what you said... I would ONLY want to
see the piece produced if it made sense for both sides of the
equation... I wouldn't want anything to be done that might jeopardize
the company's viability/longevity.

I want them to be here LONG after I'm gone... Hopefully, long after my
sons have wrung the last bit of usefulness from all my Elecraft gear
that I leave behind! :)

But I'm still pulling for them to be presented with a way to put one of
these in my hands!

73,

______________________
Clay Autery, KG5LKV
(318) 518-1389

On 2/19/2016 2:30 PM, Guy Olinger K2AV wrote:

> Lots of possible reasons why Elecraft might not do a 1500, but
> specifically price breaks and unwillingness to adopt a product that
> from other manufacturers has proven problematic at our price range for
> well understood reasons. Elecraft has been conservative about
> introductions, and that plays well for what they *do* produce.
>
> Ignore the boo-bird gallery on this reflector and note long term
> performance of other ham manufacturers including near death brushes or
> full on encounters with bankruptcy. Elecraft *grew* their business
> during the great recession. Financially stable and responsive to
> customers with great products. Hard to find combo, generally.
>
> Personally I'll let 'em do whatever they want (as if I could really
> affect that). They *might* put out a 1500, which I would buy in a
> heartbeat for the integration. But it wouldn't be a hacksaw job and it
> wouldn't put their balance sheet near the edge, and it *would* have
> gotten past all those issues that 1500's seem to be dogged with.
>
> 73, Guy
>
> On Friday, February 19, 2016, Clay Autery <[hidden email]
> <mailto:[hidden email]>> wrote:
>
> Shhhhh... We're starting a ground-swell... <grin>
>

Hisashi T Fujinaka

Re: KPA1500

In reply to this post by Brian Broggie-2

I knew there was a reason I liked Eric. :) I only run 100W, but I'm also
one of the guys who changed the WVDXC logo as a joke. If you go to the
web site, you'll see that the old (incorrect I've been told) Latin motto
"Semper Quaro" has been changed to "Semper QRO".

On Fri, 19 Feb 2016, Brian & Cyndi wrote:

> If you took the entire population of Earth and placed them in line to get a
> KPA1500, you know who would be at the very end of that line?
>
> Wayne Burdick.
>
> That man is QRP all the way. Eric, OTOH, is a full legal limit guy, so I'm
> sure the KPA500 is the compromise those two worked out.
>
> 73,
> Brian, W6FVI
>
>
> On 2/19/2016 9:51 AM, Doug Person via Elecraft wrote:
>> I think Elecraft, being in close proximity to Apple, has learned, as apple
>> has, how to keep its new products secret. Unless you could sneak into
>> Wayne's home laboratory, we will never know what he's cooking up until the
>> big reveal.
>>
>> I would definitely be on-board for a bigger Elecraft amp. Normally, I
>> wouldn't even consider another amp beyond the KPA500. But if it's Elecraft
>> - I'm in!
>>
>> 73, Doug -- K0DXV
>>
>> On 2/19/2016 7:58 AM, [hidden email] wrote:
>>> While a KPA-1500 or even a KPA-750 would be nice, Elecraft obviously has
>>> their reasons for not manufacturing it. Perhaps well designed high power
>>> SS amps are just too costly. Acom announced the 1200S last year and I have
>>> yet to see one at a US dealer.
>>>
>>> John KK9A
>>>
>>> >From Gary vk1zzgary
>>> Fri Feb 19 10:07:10 EST 2016
>>>
>>> Well the management have stated they will not be doing it so I guess you
>>> are going to need a looong list
>>>
>>> ______________________________________________________________
>>> 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]
>>
>
> ______________________________________________________________
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> 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
> Message delivered to [hidden email]
>

--
Hisashi T Fujinaka - [hidden email]
BSEE + BSChem + BAEnglish + MSCS + $2.50 = coffee
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Elecraft mailing list

Re: KPA1500

In reply to this post by Clay Autery

I would be very happy with a KPA1000.

Doug -- K0DXV

On 2/19/2016 2:02 PM, Clay Autery wrote:

> I realize and agree with all of what you said... I would ONLY want to
> see the piece produced if it made sense for both sides of the
> equation... I wouldn't want anything to be done that might jeopardize
> the company's viability/longevity.
>
> I want them to be here LONG after I'm gone... Hopefully, long after my
> sons have wrung the last bit of usefulness from all my Elecraft gear
> that I leave behind! :)
>
> But I'm still pulling for them to be presented with a way to put one of
> these in my hands!
>
> 73,
>
> ______________________
> Clay Autery, KG5LKV
> (318) 518-1389
>
> On 2/19/2016 2:30 PM, Guy Olinger K2AV wrote:
>> Lots of possible reasons why Elecraft might not do a 1500, but
>> specifically price breaks and unwillingness to adopt a product that
>> from other manufacturers has proven problematic at our price range for
>> well understood reasons. Elecraft has been conservative about
>> introductions, and that plays well for what they *do* produce.
>>
>> Ignore the boo-bird gallery on this reflector and note long term
>> performance of other ham manufacturers including near death brushes or
>> full on encounters with bankruptcy. Elecraft *grew* their business
>> during the great recession. Financially stable and responsive to
>> customers with great products. Hard to find combo, generally.
>>
>> Personally I'll let 'em do whatever they want (as if I could really
>> affect that). They *might* put out a 1500, which I would buy in a
>> heartbeat for the integration. But it wouldn't be a hacksaw job and it
>> wouldn't put their balance sheet near the edge, and it *would* have
>> gotten past all those issues that 1500's seem to be dogged with.
>>
>> 73, Guy
>>
>> On Friday, February 19, 2016, Clay Autery <[hidden email]
>> <mailto:[hidden email]>> wrote:
>>
>> Shhhhh... We're starting a ground-swell... <grin>
>>
> ______________________________________________________________
> 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]
>

wayne burdick

Re: KPA1500

Administrator

In reply to this post by Vic Rosenthal

We ARE NOT planning to offer a new amplifier. Those photos were from 2006 :)

If we change our minds on this, we'll certainly let everyone know.

Wayne
N6KR
d

>> Petr,
>>
>> Don't sell anything right away. Elecraft has never given any indication
>> that they are interested in producing an amplifier bigger than the
>> KPA500. And the prototypes are 8 or 9 years old, if I remember
>> correctly, and they would have to change a lot in order to manufacture
>> them.
>>
>> 73,
>> Vic, 4X6GP/K2VCO

wayne burdick

Re: KPA1500

Administrator

In reply to this post by Elecraft mailing list

The only thing that burns 1500 Watts at my QTH is the electric heater my teenage daughter forgets to turn off half the time when she leaves for school. The electric bill is already too high :)

Wayne

On Feb 19, 2016, at 9:51 AM, Doug Person via Elecraft <[hidden email]> wrote:

> I think Elecraft, being in close proximity to Apple, has learned, as apple has, how to keep its new products secret. Unless you could sneak into Wayne's home laboratory, we will never know what he's cooking up until the big reveal.

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wayne burdick

Re: KPA1500

Administrator

In reply to this post by Brian Broggie-2

On Feb 19, 2016, at 10:17 AM, Brian & Cyndi <[hidden email]> wrote:

> If you took the entire population of Earth and placed them in line to get a KPA1500, you know who would be at the very end of that line?
>
> Wayne Burdick.
>
> That man is QRP all the way.

A-men!

> Eric, OTOH, is a full legal limit guy, so I'm sure the KPA500 is the compromise those two worked out.

So *you* were that fly on the wall?

Wayne

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Re: KPA1500

In reply to this post by Guy Olinger K2AV

Elecraft already has a KPA1500 - just takes some effort on your part and some $$$$ Hard part is done .

4 KPA500 factory assembled from same production lot = 4 X 2300 or $9200

5 2 way 1.5 -54 mhz combiners capable 1 KW out (so cheap use both in and out- includes dump loads) - 5 X $60 or $ 300
(RF Source - in Greece - now says 1.5 -54 )

1 2 way HF 1.5 54 mhz combiner capable 2 KW - make your own or same guy might make you one - say $200

Few assorted cables and 4 240 v outlets

About $10,000 and you have it . With GOBS of redundancy and gracefull degradation..Might be on the edge of the K3 100 watts at 2KW but 1500 should be OK . Combiners say 0.3 dB loss.

73 Hank K7HP
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Petr, OK1RP/M0SIS

Re: KPA1500

In reply to this post by wayne burdick

Wayne,

many thanks for the status of KPA's projects.

We can close this thread now in order to not bother others over here.
In any case many thanks for development of your KPA500!

best regards,
73 - Petr, OK1RP

73 - Petr, OK1RP
"Apple & Elecraft freak"
B:http://ok1rp.blogspot.com
MeWe: https://bit.ly/2HGPoDx
MeWe: https://bit.ly/2FmwvDt

Arie Kleingeld PA3A-2

Re: KPA1500

I <think> that Elecraft needs a new very good product that will sell at
least 10.000 pieces in the next 3 or 4 years.
If not a PA, what product would that be? That would be a logical strategy.

(My two cents worth or maybe even less.)

73
Arie PA3A

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Kevin Stover

Re: KPA1500

A legal limit SSPA doesn't come close to meeting that requirement.
They've sold a little more than 10,000 K3/K3s's since 2007. About 8,000
KX3's in what... four years.
Less than 8,000 K2's of all flavors since 1999.
I'll bet they've sold less than 1,500 KPA500's.

On 2/20/2016 9:12 AM, Arie Kleingeld PA3A wrote:

> I <think> that Elecraft needs a new very good product that will sell
> at least 10.000 pieces in the next 3 or 4 years.
> If not a PA, what product would that be? That would be a logical
> strategy.
>
> (My two cents worth or maybe even less.)
>
> 73
> Arie PA3A
>
> ______________________________________________________________
>
>

--
R. Kevin Stover
AC0H
ARRL
FISTS #11993
SKCC #215
NAQCC #3441

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n4cc

Re: KPA1500

In reply to this post by Petr, OK1RP/M0SIS

Everything you say about Elecraft is speculation, Ken. You don't know what
it would cost them to produce the amp. My speculation is that they could do
a better job than SPE -- if they chose to do it. How many would they sell?
Who knows? The ham population is growing older fast and a lot of us old
codgers can "afford" a new amp of that caliber. I have nothing against
Ameritron amps...happen to own one myself...in addition to three Alphas and
the KPA500 -- so no I don't "need" a KPA1500. But I would buy one just
because I know the integration with the K3 and quality that would go into it
would be fantastic -- not to mention that it would be from an American
manufacturer with the best service in the industry. Furthermore, Elecraft
is competing quite successfully against competition so I disagree that they
would be "killed" by the amp competition. Alpha used to be the "Cadillac"
but the company has deteriorated significantly. Acom and OM Power represent
competition but neither one has a full bore solid state 1500 watt amp with
headroom...Ameritron is OK but not the same craftsmanship or quality of
Elecraft.

My original question to Wayne or Eric was how many people putting money down
would it take for Elecraft to produce such an amp. It's strictly a business
decision that only they can make. All the speculation in the world on this
reflector is not worth the email it is printed on...

73, Greg-N4CC

Date: Sat, 20 Feb 2016 08:59:35 -0600
From: Kevin Stover <[hidden email]>
To: [hidden email]
Subject: Re: [Elecraft] Elecraft Digest, Vol 142, Issue 38
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=windows-1252; format=flowed

Apparently the principals at Elecraft have decided, quite some time ago,
not to offer a 1500W amp.
If you want an SSPA that will do 1.5K spend the $8K for the SPE 2KFA.
If you think Elecraft can produce an amp of that caliber for less than
$8K I've got some lakefront property for sale.

There simply aren't enough hams ready, willing and able to spend that
kind of money to make it economically viable.

They'll get killed by the amp competition. As soon as all the fan boys
with money are exhausted the market will dry up.
$8K+ for an Elecraft SSPA or less than half that for an Ameritron
AL-1500...and before you go down the "Ameritron is crap" road... a
bunch of real famous contesters use the AL-1500 and win with it.

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john@kk9a.com

Re: KPA1500

In reply to this post by Petr, OK1RP/M0SIS

It would likely cost over $10,000 like the Ohio based Dishtronix Prometheus
and I do hear of many stations using them. Solid State amps typically do not
handle high SWR well so if produced a KAT-1500 would be nice accessory. I am
happy with my KPA-500/KAT-500 and the rest is an unlikely dream.

John KK9A

From Greg n4cc at windstream.net
Sat Feb 20 12:24:29 EST 2016
Previous message (by thread): [Elecraft] KPA1500

Everything you say about Elecraft is speculation, Ken. You don't know what
it would cost them to produce the amp. My speculation is that they could do
a better job than SPE -- if they chose to do it. How many would they sell?
Who knows? The ham population is growing older fast and a lot of us old
codgers can "afford" a new amp of that caliber. I have nothing against
Ameritron amps...happen to own one myself...in addition to three Alphas and
the KPA500 -- so no I don't "need" a KPA1500. But I would buy one just
because I know the integration with the K3 and quality that would go into it
would be fantastic -- not to mention that it would be from an American
manufacturer with the best service in the industry. Furthermore, Elecraft
is competing quite successfully against competition so I disagree that they
would be "killed" by the amp competition. Alpha used to be the "Cadillac"
but the company has deteriorated significantly. Acom and OM Power represent
competition but neither one has a full bore solid state 1500 watt amp with
headroom...Ameritron is OK but not the same craftsmanship or quality of
Elecraft.

My original question to Wayne or Eric was how many people putting money down
would it take for Elecraft to produce such an amp. It's strictly a business
decision that only they can make. All the speculation in the world on this
reflector is not worth the email it is printed on...

73, Greg-N4CC

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Doug Turnbull

Elecraft Amplifiers and KPA 1500!!!!

Dear OMs and YLs,
As we are allowed to run 1500W for contesting in EI, I am fortunate in
old age to own an SPE Expert 2kFA, Acom 1000 and Acom 2000A. They all have
advantages and drawbacks. Acom and SPE both build to a high standard and
in my experience are most reliable. The Acom 1000 is perhaps the very best
buy in a non-automatic self tune vacuum tube amp. The Acom 2000A is a
beautiful auto-tune and runs quietly but waiting for it to warm up takes a
long time!

The SPE Expert 2KFA is solid state and instant on. It is a great
except for two things:
1)This is a very noisy amplifier and I wonder if this is not a problem with
most solid state amps. Cooling is critical to keep junction temperatures
down. The noise problem remains even if running on the 600 Watt power
level at the 400 Watts allowed in EI for non contest QSOs. I can not
operate with the SPE unless wearing headphones preferably ones with good
noise rejection.

2) If one runs the SPE 2kFA without the built in automatic ATU then even
with an SWR of around 1.5/1.6 you will create terrible distortion on either
SSB or CW. This distortion will quickly make you unpopular on the bands.
One must be careful of this. Dropping the power level does not seem to
solve this problem. Of course it has a good internal automatic tuner which
works wonderfully so if you use the tuner there is no problem. A multiband
antenna which did not require a tuner normally but did on one band could
prove slightly problematic. You would need to change it over to another of
the six antenna output connectors and use the built in auto-tuner.

I must say something else in favour of the SPE it does not excessively
heat the room while having the Acom 2000A in use is like having Wayne's
daughter's electric heater on. The SPE is definitely more efficient when it
comes to power consumption.

I am an almost fanatical Elecraft user but do not own a KPA500 as I saw
no point. A KPA 1500 would certainly interest me but I wonder if it would
not be priced at too high a level for my pocket. Alphas do not appear to
be overpriced but these days have a poor reputation in Europe. This
surprises me but is the case. I have at times seriously considered Alpha
and backed off because of the advice of friends whose opinion I value.

Ameritron amps also get bad press but seem to do the job for relatively
little money. I have a friend with an old Ameritron who is still very fond
of it and would not part even though he now also owns an Acom 1010. So the
lower cost alternative continues to fill a need.

My friends with KPA 500 amplifiers are all fond of them and have nothing
negative to say though I am told on air by some others that the KPA 500 is
not so quiet. However the EI Elecraft guru EI6IZ says that the KPA 500 is
quiet. Not having used one I can not say. No one seems to be selling
their KPA 500. Some of us really want it to be as quiet as a library.

Before you purchase an amplifier try using one of visit a ham with one.
Consider noise, turn on time, distortion, reliability, band coverage, power
efficiency and your pocket book. If you are an old goat like me with a
fragile back think of weight as well. The KPA 1300 looks good for
DXpeditions as of course does the KPA 500 which has been so popular of late.

Elecraft is first class in all respects. Design, service and support
are just unbeatable. We are fortunate that they exist and have brought
higher standards to our hobby. I suppose a KPA 1500 would have me
drooling.

73 Doug EI2CN

-----Original Message-----
From: Elecraft [mailto:[hidden email]] On Behalf Of
[hidden email]
Sent: 20 February 2016 18:02
To: [hidden email]
Subject: Re: [Elecraft] KPA1500

It would likely cost over $10,000 like the Ohio based Dishtronix Prometheus
and I do hear of many stations using them. Solid State amps typically do not
handle high SWR well so if produced a KAT-1500 would be nice accessory. I am
happy with my KPA-500/KAT-500 and the rest is an unlikely dream.

John KK9A

From Greg n4cc at windstream.net
Sat Feb 20 12:24:29 EST 2016
Previous message (by thread): [Elecraft] KPA1500

Everything you say about Elecraft is speculation, Ken. You don't know what
it would cost them to produce the amp. My speculation is that they could do
a better job than SPE -- if they chose to do it. How many would they sell?
Who knows? The ham population is growing older fast and a lot of us old
codgers can "afford" a new amp of that caliber. I have nothing against
Ameritron amps...happen to own one myself...in addition to three Alphas and
the KPA500 -- so no I don't "need" a KPA1500. But I would buy one just
because I know the integration with the K3 and quality that would go into it
would be fantastic -- not to mention that it would be from an American
manufacturer with the best service in the industry. Furthermore, Elecraft
is competing quite successfully against competition so I disagree that they
would be "killed" by the amp competition. Alpha used to be the "Cadillac"
but the company has deteriorated significantly. Acom and OM Power represent
competition but neither one has a full bore solid state 1500 watt amp with
headroom...Ameritron is OK but not the same craftsmanship or quality of
Elecraft.

My original question to Wayne or Eric was how many people putting money down
would it take for Elecraft to produce such an amp. It's strictly a business
decision that only they can make. All the speculation in the world on this
reflector is not worth the email it is printed on...

73, Greg-N4CC

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Edward R Cole

Re: KPA1500

In reply to this post by Petr, OK1RP/M0SIS

Well reading Wayne's response maybe one should look elsewhere for a
kilowatt or more HF linear. I particular I would suggest looking at
the LDMOS amp kits and assembled amps recently available (e.g. W6PQL)
http://www.w6pql.com/1_kw_sspa_for_1_8-54_mhz.htm

I have built some of his 2m amp and his 23cm amp kits. Really have
to wonder where the ham "build-it" spirit has gone? But Jim will
build on contract if you got the money (which apparently there are
quite few that do).

Maybe someday I will have Jim build the amp pallets for me to
incorporate into a full amp of my own design. He really offers a lot
of subassemblies which one can combine.

73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
[hidden email]

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Kevin Stover

Re: KPA1500

I am a fan of Klitzing's designs.

I did a rough and fast add up of all the stuff needed to build one of
his 1KW designs using assembled and tested boards.
I came up with right at $2K. That's just parts. No sheet metal, no
fasteners, no wire, no fans, NO 50V - 40A switching power supply. You
won't be running it on 120V and it won't fit in a K3 case.

The LPF he uses could be improved. He uses a 5 pole Chebishev with SMT
Mica caps.
I'd use the 5 pole Cauer from the SSPA project in the 2012 Handbook,
sized for 1.5KW. It uses ceramic SMT caps (more expensive but worth it
for a clean amp). Using the Cauer design means tuning the LPF with a
network analyzer to place the nulls on top of the odd order harmonics.

Someone has commissioned Jim to build a 2KW version of his 160-6m SSPA.
Basically two of his 1KW amps throttled back to 750W, in one box with a
high power splitter/combiner. The power supply jumps to 50V, 60A and it
still won't fit in a K3 case. The two 10"x10"x4" aluminum heat sinks
weigh 10 pounds combined. It will not be a quiet amp but might actually
do full power RTTY all day.

On 2/20/2016 1:22 PM, Edward R Cole wrote:

> Well reading Wayne's response maybe one should look elsewhere for a
> kilowatt or more HF linear. I particular I would suggest looking at
> the LDMOS amp kits and assembled amps recently available (e.g. W6PQL)
> http://www.w6pql.com/1_kw_sspa_for_1_8-54_mhz.htm
>
> I have built some of his 2m amp and his 23cm amp kits. Really have to
> wonder where the ham "build-it" spirit has gone? But Jim will build
> on contract if you got the money (which apparently there are quite few
> that do).
>
> Maybe someday I will have Jim build the amp pallets for me to
> incorporate into a full amp of my own design. He really offers a lot
> of subassemblies which one can combine.
>
> 73, Ed - KL7UW
>
>

Petr, OK1RP/M0SIS

Re: KPA1500

In reply to this post by wayne burdick

http://www.elecraft.com/KPA1500/KPA1500.htm

...many thanks Wayne :)

73 - Petr, OK1RP

73 - Petr, OK1RP
"Apple & Elecraft freak"
B:http://ok1rp.blogspot.com
MeWe: https://bit.ly/2HGPoDx
MeWe: https://bit.ly/2FmwvDt