Re: [Elecraft] FW: Handles and feet - was KPA 500 vs New 1500 watt amp

[Clay Autery]

OK.

1) For the "feet", find a supply of little discs of desired thickness
made from Sorbothane.
2) Buy the appropriate 3M Command strips. removable.  Even if the
glue goes, it will come right off.

Or you can do the research and get the right glue chemistry for the
application and have it applied to the Sorbothane discs...

73,

__
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389

On 4/22/2017 12:32 AM, Erik Basilier wrote:
>  
>
>  
>
> From: Erik Basilier [mailto:ebasil...@cox.net] 
> Sent: Friday, April 21, 2017 9:45 PM
> To: 'Harry Yingst' 
> Subject: RE: [Elecraft] Handles and feet - was KPA 500 vs New 1500 watt amp
>
>  
>
> Harry, I have considered doing the same. However, my experience with using 
> the stick-ons is that the glue goes bad in a few years, and the foot falls 
> off, leaving an ugly residue of glue.
>
>  
>
> From: Harry Yingst [mailto:hlyin...@yahoo.com] 
> Sent: Friday, April 21, 2017 8:35 PM
> To: Erik Basilier  >; 'Nr4c' 
>  >; 'Clay Autery' 
>  >
> Cc: elecraft@mailman.qth.net  
> Subject: Re: [Elecraft] Handles and feet - was KPA 500 vs New 1500 watt amp
>
>  
>
> I put little stick on feet where two peices of gear may touch
>
>  
>
>  
>
>  
>
>  
>
>
>
>  Original message 
> From: Erik Basilier  > 
> Date: 2017-04-21 10:59 PM (GMT-05:00) 
> To: 'Nr4c'  >, 'Clay Autery' 
>  > 
> Cc: elecraft@mailman.qth.net   
> Subject: Re: [Elecraft] Handles and feet - was KPA 500 vs New 1500 watt amp 
>
> As the number of Elecraft boxes on my shelf has grown, what I have long
> feared has recently happened: The handle on one box (or probably a screw on
> the handle) created a small scratch on the nude side of neighboring box. It
> looks like the KPA1500 handle design is unchanged. Maybe it is time for an
> upgrade of the handle design, or maybe we could use a kit of add-on feet or
> spacers?
>
> 73,
> Erik K7TV
>
> -Original Message-
> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Nr4c
> Sent: Friday, April 21, 2017 7:44 PM
> To: Clay Autery  >
> Cc: elecraft@mailman.qth.net  
> Subject: Re: [Elecraft] KPA 500 vs New 1500 watt amp
>
> It's for carrying and the little feet keep the case from getting scratched. 
>
> There's no space or - in Elecraft products.  
>
> Sent from my iPhone
> ...nr4c. bill
>
>
>> On Apr 21, 2017, at 6:35 PM, Clay Autery >  > wrote:
>>
>> Cannot wait to get a look inside
>>
>> There IS a handle on the left side (as you look at it).  I don't know 
>> if the small feet on the right side are for vertical orientation or to 
>> prevent the total blockage of the vents if shoved up next to another 
>> K-line product OR the power supply box...
>>
>> __
>> Clay Autery, KY5G
>>
> __
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[Elecraft] FW: Handles and feet - was KPA 500 vs New 1500 watt amp

[Erik Basilier]

 

 

From: Erik Basilier [mailto:ebasil...@cox.net] 
Sent: Friday, April 21, 2017 9:45 PM
To: 'Harry Yingst' 
Subject: RE: [Elecraft] Handles and feet - was KPA 500 vs New 1500 watt amp

 

Harry, I have considered doing the same. However, my experience with using the 
stick-ons is that the glue goes bad in a few years, and the foot falls off, 
leaving an ugly residue of glue.

 

From: Harry Yingst [mailto:hlyin...@yahoo.com] 
Sent: Friday, April 21, 2017 8:35 PM
To: Erik Basilier  >; 'Nr4c' 
 >; 'Clay Autery' 
 >
Cc: elecraft@mailman.qth.net  
Subject: Re: [Elecraft] Handles and feet - was KPA 500 vs New 1500 watt amp

 

I put little stick on feet where two peices of gear may touch

 

 

 

 



 Original message 
From: Erik Basilier  > 
Date: 2017-04-21 10:59 PM (GMT-05:00) 
To: 'Nr4c'  >, 'Clay Autery' 
 > 
Cc: elecraft@mailman.qth.net   
Subject: Re: [Elecraft] Handles and feet - was KPA 500 vs New 1500 watt amp 

As the number of Elecraft boxes on my shelf has grown, what I have long
feared has recently happened: The handle on one box (or probably a screw on
the handle) created a small scratch on the nude side of neighboring box. It
looks like the KPA1500 handle design is unchanged. Maybe it is time for an
upgrade of the handle design, or maybe we could use a kit of add-on feet or
spacers?

73,
Erik K7TV

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Nr4c
Sent: Friday, April 21, 2017 7:44 PM
To: Clay Autery  >
Cc: elecraft@mailman.qth.net  
Subject: Re: [Elecraft] KPA 500 vs New 1500 watt amp

It's for carrying and the little feet keep the case from getting scratched. 

There's no space or - in Elecraft products.  

Sent from my iPhone
...nr4c. bill


> On Apr 21, 2017, at 6:35 PM, Clay Autery   > wrote:
> 
> Cannot wait to get a look inside
> 
> There IS a handle on the left side (as you look at it).  I don't know 
> if the small feet on the right side are for vertical orientation or to 
> prevent the total blockage of the vents if shoved up next to another 
> K-line product OR the power supply box...
> 
> __
> Clay Autery, KY5G
> 

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[Elecraft] REL: KPA16500 added to KPA00

[Marvin Wheeler]

Thanks to everyone that replied to my query. It is now working as designed.
Using the K3S has been a challenge for me as my tack is not as sharp as it
used to be. I am 79 years old, not complete computer illiterate but not a
guru either. I surely missed this feature when reading the users manual one
of the many time.

 

I would like to say that after using Collins Gold Dust twins, S-line, Yaesu
Ft-1000D, and Drake twins the Elecraft K3S is head and shoulders above the
rest. It certainly has the best receiver I have ever used and the K3S,
KPA500, KAT500 and integrate beautifully. It is becoming more intuitive as
time goes on.

 

Thanks for the support of this group and the Elecraft owners and staff.

 

Marv - KG7V

> On 4/21/2017 6:25:36 PM, Jack Brindle (jackbrin...@me.com
 ) wrote: 
> > Marvin; 
> 
> As others have noted, we have had this feature in the KPA500 since it
originally shipped long ago. 
> Take a look at the KPA500 manual's section on Transmitting. The
description on Page 9 of the 
> RevC-2 manual, item 4 tells you how to set this up. Note that you must be
using the AUXIO cable 
> between the KPA500 and the K3/K3S, and in the KPA500 menu, the RADIO
parameter must be 
> set to K3. 
> 
> Enjoy your KPA500! 
> 
> Jack Brindle, W6FB 
> Elecraft Engineering 





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[Elecraft] KPA1500 amplifier with built-in ATU, separate power supply

[John Perlick]

You have to remember that the built in tuner matches the amp to the 
transmission line.  It does nothing to improve the SWR at the antenna or to 
protect your coax.  

Well, it might incrementally improve the loss in the coax because the reflected 
wave from a high SWR antenna would not be the-reflected at the amp.  It would 
be fully absorbed into the amp which is well matched.  

The really good thing that the internal tuner does is make life easier for the 
amp.  You will get more power out because the protection circuits don't have to 
protect the amp.  I'd be far more protective of my amp than my coax!  

John Perlick
Aria Corporation
www.ariacorp.com

> On Apr 21, 2017, at 2:29 PM, "elecraft-requ...@mailman.qth.net" 
>  wrote:
> 
> KPA1500
>amplifier with built-in ATU, separate power supply
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Re: [Elecraft] KPA1500

[Vic Rosenthal]

Here in 4X, I would not only have the 17% VAT but the absolutely insane cost to 
UPS it from California (and I wouldn't trust any other carrier).

But if you do a survey of other high-quality no-tune (both solid and 
hollow-state) amplifiers, you will find that Elecraft's pricing is quite 
reasonable. And you get the integration and good service as a bonus. I suspect 
they will do quite well with this product.

Vic 4X6GP

> On 22 Apr 2017, at 1:19, Michael Walker  wrote:
> 
> Wow..  $6K.
> 
> That will make it over $10K Canadian between the dollar exchange and the
> extra 13% tax here in VE3 land.
> 
> Mike va3mw
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Re: [Elecraft] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply

[Vic Rosenthal]

Just as a bit of anecdotal data, I am feeding a 20m dipole with 1200 watts 
through 600-ohm open line on 40 through 10 meters. The SWR on 40 meters 
approaches 100:1 (the line is short, but I am still eating about 2.2 dB loss).

Anyway, this presents a very difficult problem for most tuners -- and if you 
try it with an unbalanced tuner plus balun, even a 5kW DXE balun gets too hot 
quickly.

My solution was to cancel the reactance by switching in external capacitance or 
inductance as needed on 'difficult' bands (40 and 30 meters) and then letting a 
commercial autotuner take it from there.

Some day I'll put the matching circuits at the antenna and get the 2.2 dB back.

Vic 4X6GP

> On 21 Apr 2017, at 22:59, GRANT YOUNGMAN  wrote:
> 
> 2.  There are many ways to bring any antenna/feedline's Z0 to something that 
> a reasonably-sized affordable auto-tuner can handle at not too great a feed 
> line SWR.  Not the least of which is to feed a commercial old fashioned 
> mechanical tuner with heavy-rated components that can handle the reflected 
> power from whatever bobbie-pin you’re trying to match without just melting 
> all the plastic in the tuner if you key down for a bit too long.
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[Elecraft] PX3

[John Lally]

Are there any plans to have the PX3 project its screen to a computer?

 

Thanks

 

W7JJL

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Re: [Elecraft] Handles and feet - was KPA 500 vs New 1500 watt amp

[Harry Yingst via Elecraft]

I put little stick on feet where two peices of gear may touch





 Original message 
From: Erik Basilier  
Date: 2017-04-21  10:59 PM  (GMT-05:00) 
To: 'Nr4c' , 'Clay Autery'  
Cc: elecraft@mailman.qth.net 
Subject: Re: [Elecraft] Handles and feet - was KPA 500 vs New 1500 watt amp 

As the number of Elecraft boxes on my shelf has grown, what I have long
feared has recently happened: The handle on one box (or probably a screw on
the handle) created a small scratch on the nude side of neighboring box. It
looks like the KPA1500 handle design is unchanged. Maybe it is time for an
upgrade of the handle design, or maybe we could use a kit of add-on feet or
spacers?

73,
Erik K7TV

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Nr4c
Sent: Friday, April 21, 2017 7:44 PM
To: Clay Autery 
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA 500 vs New 1500 watt amp

It's for carrying and the little feet keep the case from getting scratched. 

There's no space or - in Elecraft products.  

Sent from my iPhone
...nr4c. bill


> On Apr 21, 2017, at 6:35 PM, Clay Autery  wrote:
> 
> Cannot wait to get a look inside
> 
> There IS a handle on the left side (as you look at it).  I don't know 
> if the small feet on the right side are for vertical orientation or to 
> prevent the total blockage of the vents if shoved up next to another 
> K-line product OR the power supply box...
> 
> __
> Clay Autery, KY5G
> 

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Re: [Elecraft] Sub Receiver & KBPF3

[Bill Frantz]

Ian has a lot of good advice below.

I have big hands -- I always look for the XL gloves -- and I 
have removed the sub receiver in my K3 several times. In 
fairness, I also knit socks using small needles, so I get 
practice with small tools.


The only problems I had were getting the TMP connectors 
connected. I had one the looked OK, but wasn't. Elecraft support 
told me how to trace the signal through the sub and it became obvious.


There is a zen to working on physical things, whether it is cars 
or K3s. Metal fasteners will tell you when you are over torquing 
them as you stretch the metal. It will be elastic before it 
takes on a permanent set or breaks and you can feel the 
elasticity. You won't be able to feel the elasticity with an 
electric screwdriver.


73 Bill AE6JV

On 4/20/17 at 1:16 AM, gm3...@ifwtech.co.uk (Ian White) wrote:


Grant is so right: practice counts for a lot. Procrastinating only
allows you to forget everything you learned the last time.

Along with training yourself, you are also 'training' the connector pins
into the correct locations for easier insertion the next time around.
The same applies to the bent-metal covers of the KRX3, which are
difficult to assemble the first time, but eventually become trained to
fit each other.

TL;DR version: As you get better, the job itself becomes easier as well.
So do it!

A few tips when replacing the KRX3:

0. Rule Zero of Elecraft assembly: All Parts Fit Exactly. If that
doesn't seem to be true, you don't have the parts aligned correctly yet.

1. Install the TMP connectors *before* attempting to mate the multi-pin
connectors. Use hemostats to handle the TMP connectors. 6in hemostats
(aka artery forceps) are very cheap on eBay. Use the locking handles to
grip the connector body at the correct angle for insertion, and feel for
the center pin. Be patient. When the center pin locates correctly, the
connector body will locate too. Now unlock the hemostat handles and use
the tips of the jaws to push the whole connector firmly into place. You
should distinctly feel the connector move inward.
Again, this is all about practice. When you have learned what a
correctly seated TMP connector looks and *feels* like, you won't forget.

Also avoid removing or disturbing TMP connectors unnecessarily. A
surprising amount of work can be done while leaving them in place - but
always check them again after reassembly.
2. The multi-pin connector at the front right of the KRX3 aligns
*exactly* with the edges of the vertical adapter board. Memorize what
this should look like when correctly assembled. Ease this connector into
place first, but don't screw anything down yet.

3. The multi-pin connector at the rear left of the KRX3 is more
difficult to align. It is more difficult to see from above, and also its
adapter board can move away from the vertical. To see what you're doing,
remove the left side panel (see tip 5) and use a screwdriver to nudge
the adapter board into the correct position. Then the KRX3 will drop
easily into place. Look in from the left-hand side to check that *all*
of the pins are *correctly* mated.

4. Remember Rule Zero. If the KRX3 does not drop easily into place with
all connectors correctly mated, or if the long retaining screws passing
through the KRX3 don't immediately find the threaded pillars below...
then something is wrong. Go back.

5. Removing the side, top and bottom covers from a K3(S) is easy. If it
makes some other part of the job more easy to do, then don't hesitate.
Contrary to doctrine, you can use an electric screwdriver to remove
cover panels without damage - but on two conditions: (a) that you use
the correct Phillips screwdriver bit; and (b) you understand that an
"electric screwdriver" is a small, low-power tool that nestles in the
hand - not a drill-driver with a half-inch chuck!
But always go back to the manual screwdriver when inserting and
tightening screws. An electric screwdriver is *not* suitable for
tightening these small screws because there is a great risk of
over-tightening and causing damage. Over-tightened screws will also be
much more difficult to remove the next time. (Even if you own an
instrument-grade electric screwdriver with a clutch that is correctly
adjusted for these particular screws, you will still make mistakes.)

---
Bill Frantz| I like the farmers' market   | Periwinkle
(408)356-8506  | because I can get fruits and | 16345 
Englewood Ave
www.pwpconsult.com | vegetables without stickers. | Los Gatos, 
CA 95032


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Re: [Elecraft] KPA 500 vs New 1500 watt amp

[Robert G Strickland]

Wayne...

Yes! The "big" switch, thereby demonstrating flexibility in matters of 
output power. "A foolish consistency is the hobgoblin of small minds" as 
Emerson would say. (I assume at least an upright knife-switch, bolted to 
the floor and connected to bank of van de graaff generators...)


Have a good day.

...robert ke2wy

On 04/21/2017 16:31, Wayne Burdick wrote:

Our philosophy at Elecraft is to cover both ends of the spectrum.
Figuratively speaking.

When the bands are open, the birds are singing, and the sun is
shining, you’ll find us outdoors using a hand-held KX2 at 10 watts
with a whip. But late at night, when propagation is in the tank and
that rare DX station peeks over the horizon for a once-in-a-lifetime
fleeting moment, seconds count and size really does matter. At these
times, we flip the big switch.

Wayne N6KR




On Apr 21, 2017, at 9:02 AM, Roy Koeppe  wrote:


Aboot:

"And the reason you "need" the extra 1000 W is that the others in
the pileup are all running max power.  A typical arms race, with
tempers to match."


Apparently none of you here ragchews on 80M CW roundtables at
sunrise times during spring/summer thunderstorms seasons across the
country! That's the reason QRO was born...

73,  Roy   K6XK Iowa

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--
Robert G Strickland, PhD ABPH - KE2WY
rc...@verizon.net.usa
Syracuse, New York, USA
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Re: [Elecraft] Experiences using a portable HF loop

[Ron D'Eau Claire]

The very BEST magnetic loops are incredibly inefficient, yet like any
"incredibly inefficient" antenna one can make amazing contacts on them when
conditions are right. 

The problem is with resistive losses. The day we have room-temperature
superconductors, we will have efficient small transmitting loops. Until
then, only a few percent of the power applied is radiated. 

For now, they are great when simplicity of setup allows operation where
otherwise nothing could be done. 

73, Ron AC7AC

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Phil
Hystad
Sent: Friday, April 21, 2017 7:45 PM
To: Eddy Avila
Cc: Elecraft
Subject: Re: [Elecraft] Experiences using a portable HF loop

The May 2017 QST not only does a review of the Elecraft KX2 but it reviews
the Alpha Antenna, 10-40 meter support.  This is a magnetic loop antenna and
I think it retails (basic model) for $299.

73, phil, K7PEH

> On Apr 21, 2017, at 6:24 PM, Eddy Avila  wrote:
> 
> Greetings all, I'm curious to hear from anyone using a portable HF
magnetic loop. I've read the theory behind them so I'd like to hear your
opinion about them? How efficient these antennas are, especially running
qRP.
> 
> 
> Thanks all,
> 
> 
> 73
> 
> 
> ed
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Re: [Elecraft] Handles and feet - was KPA 500 vs New 1500 watt amp

[Erik Basilier]

As the number of Elecraft boxes on my shelf has grown, what I have long
feared has recently happened: The handle on one box (or probably a screw on
the handle) created a small scratch on the nude side of neighboring box. It
looks like the KPA1500 handle design is unchanged. Maybe it is time for an
upgrade of the handle design, or maybe we could use a kit of add-on feet or
spacers?

73,
Erik K7TV

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Nr4c
Sent: Friday, April 21, 2017 7:44 PM
To: Clay Autery 
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA 500 vs New 1500 watt amp

It's for carrying and the little feet keep the case from getting scratched. 

There's no space or - in Elecraft products.  

Sent from my iPhone
...nr4c. bill


> On Apr 21, 2017, at 6:35 PM, Clay Autery  wrote:
> 
> Cannot wait to get a look inside
> 
> There IS a handle on the left side (as you look at it).  I don't know 
> if the small feet on the right side are for vertical orientation or to 
> prevent the total blockage of the vents if shoved up next to another 
> K-line product OR the power supply box...
> 
> __
> Clay Autery, KY5G
> 

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Re: [Elecraft] KPA1500 feature added to KPA500

[Nr4c]

Has been forever. 

Sent from my iPhone
...nr4c. bill


> On Apr 21, 2017, at 7:45 PM, Marvin Wheeler  wrote:
> 
> 
> 
> Somewhere reading the information about the new KPA1500 I read that if the
> new amp was powered on it would cause the K3/K3S to automatically lower to
> drive the amp. Can or will this feature be added to the KPA500? I would be a
> welcome addition in my opinion.
> 
> 
> 
> Marv - KG7V
> 
> 
> 
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Re: [Elecraft] KPA 500 vs New 1500 watt amp

[Nr4c]

A long time ago. The KPA500 is over $4 per watt. 

Sent from my iPhone
...nr4c. bill


> On Apr 21, 2017, at 6:42 PM, Fred Jensen  wrote:
> 
> So I guess the former rule of thumb, "One Dollar per Watt" has met some 
> unspecified death.
> 
> 73,
> 
> Fred ("Skip") K6DGW
> Sparks NV USA
> Washoe County DM09dn
> 
> 
> 
>> On 4/21/2017 12:30 PM, Edward R Cole wrote:
>> Congrats to all who have wanted a KPA1500 (I'm not currently a prospect):
>> 
>> Interesting misconceptions already "flying"
>> "1500w cost three times 500w"
>> 
>> KPA1500 with internal tuner = $5995
>> KPA500+KAT500 = $2684.95*
>> 5995/2684.95 = 2.23
>> *April special price
>> 
>> Power requirement 240vac @ 20A = 4800w
>> But likely the amp will draw 1500w/0.7 = 2143w (or so) plus maybe 200-300w 
>> for solid-state control ckts
>> call it 2400w in round numbers or 240v @ 10A (just my guess)
>> 
>> My 6m 1000w PA draws 50A @ 50v = 2500w (40% eff. with 16 transistors)
>> My 2m-8877 1400w PA draws 750ma @ 3700v = 2775w (50% eff. but with tired old 
>> tube)
>> 
>> 20A is a convenient 240v value since breakers for that are readily 
>> available;  I ran about 45-feet of No. 8 wiring to bring 240vac to my shack 
>> where I use a 60A breaker box with a 20A breaker (only tripped a couple 
>> times in several years useage - HV flashover & HV transformer failure).
>> 
>> I ran my own 240v run as I tired of waiting five months for the $700 
>> Electrician to show up.  I think the 4 cond. No. 8 cable ran about 
>> $1.50/foot plus costs for 30A 240v twist lock connectors/outlets & 60A 
>> utility box with three breakers.  I see 2v drop on 240vac under load of the 
>> 8877.
>> 
>> KPA1500 nice design using separate 50v switching PS.  Many new ham radio 
>> PA's coming out that use 50v so this could be multi-use PS. I would like a 
>> 2m 1500w sspa using LDMOS to replace the 8877 & HVPS.  Not looking for that 
>> from Elecraft (I will probably buy a kit from W6PQL).
>> 
>> PS: if I were in market for HF QRO the KPA1500 would be my choice!  I 
>> finally upgraded to the KXPA100+KXAT100 for my HF/6m needs (driven by either 
>> KX3 or K3/10).
>> 
>> 73, Ed - KL7UW
>>  http://www.kl7uw.com
>> Dubus-NA Business mail:
>>  dubus...@gmail.com
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>> 
>> 
>> 
>> ---
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>> http://www.avg.com
>> 
>> 
> 
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Re: [Elecraft] Experiences using a portable HF loop

[Phil Hystad]

The May 2017 QST not only does a review of the Elecraft KX2 but it reviews the 
Alpha Antenna, 10-40 meter support.  This is a magnetic loop antenna and I 
think it retails (basic model) for $299.

73, phil, K7PEH

> On Apr 21, 2017, at 6:24 PM, Eddy Avila  wrote:
> 
> Greetings all, I'm curious to hear from anyone using a portable HF magnetic 
> loop. I've read the theory behind them so I'd like to hear your opinion about 
> them? How efficient these antennas are, especially running qRP.
> 
> 
> Thanks all,
> 
> 
> 73
> 
> 
> ed
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Re: [Elecraft] KPA 500 vs New 1500 watt amp

[Nr4c]

It's for carrying and the little feet keep the case from getting scratched. 

There's no space or - in Elecraft products.  

Sent from my iPhone
...nr4c. bill


> On Apr 21, 2017, at 6:35 PM, Clay Autery  wrote:
> 
> Cannot wait to get a look inside
> 
> There IS a handle on the left side (as you look at it).  I don't know if
> the small feet on the right side are for vertical orientation or to
> prevent the total blockage of the vents if shoved up next to another
> K-line product OR the power supply box...
> 
> __
> Clay Autery, KY5G
> 
>> On 4/21/2017 5:19 PM, Bill Johnson wrote:
>> Ed,
>> 
>> You only missed the fact that the heaviest part is is < 22#'s.  Wow, that is 
>> one of the biggest reasons I sold my THP 2.5kfx, I could barely lift it, not 
>> to mention THP is no longer in business.  I haven't seen Elecraft's 
>> circuitry but with the two output devices, would seem earily similar. The 
>> design of the THP output is what sold me on buying it.  Nice and compact but 
>> terrible to carry.  I note there are feet on the side which implies handles. 
>>  This I haven't seen mentioned.
>> 
>> 73,
>> Bill
>> K9YEQ
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[Elecraft] How loud are the Fans on the KPA1500?

[Harry Yingst via Elecraft]

I was curious how load the fans are on the KPA1500?
Are they as loud as the fan on the KPA500?

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[Elecraft] KPA500/KAT500 interest

[Dennis L. Haarsager]

Want to get one of Elecraft's new loudenboomers but need to free up some
money?  I'd be interested in buying a 120v KPA500/KAT500 with no known
problems from a smoke-free ham shack (tobacco or burning finals).  Price
and condition considered. Delivery date negotiable.

Please respond directly rather than on list.

73,
Dennis L. Haarsager, N7DH/1
Kittery Point, Maine
-- 
Mail: PO Box 192, Kittery Point, ME 03905-0192
Delivery: 598 Haley Rd, Kittery Point, ME 03905-5628
+1 207-703-2472 (home) | +1 202-431-1556 (mobile) | +1 866-587-3403 (fax)
  
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Re: [Elecraft] KIO3 board for K3

[Carl Jón Denbow]

Sent from my iPhone
===
Carl Jón Denbow, N8VZ
17 Coventry Lane
Athens, Ohio 45701-3718
 
c...@n8vz.com
www.n8vz.com
EM89wh
 
IRLP 4533   Echolink 116070
 
PSK and JT65 Forever!
===

> On Apr 21, 2017, at 8:02 PM, Jorge Mejia P  wrote:
> 
> 
> Hello group
> Does anyone have a KIO3 board from K3 that is not in use ?, I lost the one
> on my early K3. 
> If so Please contact me off the list to work out some deal. 
> 
> Thank you
> Jorge HK4CZE
> Sent from my iPad
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Re: [Elecraft] KPA1500 PIN diode T/R, fans

[Nr4c]

You should be able to one of those items. You pick!

Sent from my iPhone
...nr4c. bill


> On Apr 21, 2017, at 6:15 PM, Bill Johnson  wrote:
> 
> This is impossible to resist buying.  Sell the car, the house, the Wife... 
> nope on the last.
> 
> 73,
> Bill
> K9YEQ
> 
> -Original Message-
> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wayne 
> Burdick
> Sent: Friday, April 21, 2017 2:25 PM
> To: Elecraft 
> Subject: Re: [Elecraft] KPA1500 PIN diode T/R, fans
> 
> Hi Paul,
> 
> To protect the amp and T/R switch, we’re using heavy-duty PIN diodes, very 
> high reverse voltage, and virtually instantaneous detection of high SWR. All 
> possible catastrophic load scenarios have been extensively tested.
> 
> On fans:
> 
> We started with a humongous custom heat sink extrusion and thick copper 
> spreader, optimized for our packaging. We also use two LDMOS devices rather 
> than one, allowing heat to be distributed across all that heavy metal much 
> more effectively. This slows fan onset time. (Some competing compact amps use 
> inadequate heat sinking, with predictable results.)
> 
> Next, we added three large, deep fans. The center fan is controlled 
> independently so it can turn on first, at low speed. In many cases that's all 
> you'll ever hear. Only during high duty-cycle operation are the other two 
> fans turned on. We then carefully manage the speed of all three. 
> 
> Ultimately, you have to get rid of the heat. But our goal is always to 
> minimize noise. 
> 
> 73,
> Wayne
> N6KR
> 
> 
>> 
>> *From: *"Paul Christensen" 
>> 
>> Wayne,
>> 
>> Congrats on what looks like a very well-designed amp.  I've been 
>> waiting on an amp with these features for a very long time.  Of 
>> particular interest to me is your continued use of PIN diode T/R 
>> switching.  Can you describe SWR protection to the Rx PIN diodes at 
>> the 1.5KW level?  I suspect that a fast-detecting SWR switch will be 
>> the main focus of protection, as well as HV back-biasing of the Rx 
>> diodes.  An open or short RF termination requires over 900V DC to keep 
>> Rx PIN diodes from going into conduction.  Can you describe this area 
>> of circuit protection just a bit?
>> 
>> Secondly, I know that fan noise is difficult to quantify in words.
>> Anything
>> particularly innovative you're going to minimize cooling noise?  Thanks!
>> 
>> Paul, W9AC
>> 
>> 
>> 
>> 
>> ---
>> This email has been checked for viruses by Av

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Re: [Elecraft] Experiences using a portable HF loop

[Harry Yingst via Elecraft]

I have never used one but knew someone who did, he basically said a end fed 
wire out performed it.



  From: Eddy Avila 
 To: Elecraft  
 Sent: Friday, April 21, 2017 9:36 PM
 Subject: [Elecraft] Experiences using a portable HF loop
   
Greetings all, I'm curious to hear from anyone using a portable HF magnetic 
loop. I've read the theory behind them so I'd like to hear your opinion about 
them? How efficient these antennas are, especially running qRP.


Thanks all,


73


ed
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Re: [Elecraft] KPA1500

[Harry Yingst via Elecraft]

Admittedly I'm the guy who looks at my jeep and realize I paid more for it than
I did for my 1st house and I still expect to see sneakers costing less than $20.


It first glance the price for the KPA1500 does seem high, but when you stop and
really think about it you realize that it's a fair price for what you are 
getting.

Do I see myself getting one... Not right away, but possibly in the future.









From: Hunter Ellington 
To: elecraft@mailman.qth.net 
Sent: Friday, April 21, 2017 9:21 PM
Subject: Re: [Elecraft] KPA1500



Well, I was never advocating for an Elecraft legal limit amp, so I

don't have a dog in this fight, but at $6K, it takes the amp out of

the hobby category. I know things are expensive today, but this price

point will be very self limiting.  Good luck and I hope you sell a lot

of them..


Hunter Ellington, K0GFY

Sent using Hushmail
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[Elecraft] KPA-1500: Gain Mod when FCC Lifts 15db Rule

[James F. Boehner MD via Elecraft]

Kevin,

The current FCC rules for certificating a linear amplifier in the US (in
order for a manufacturer to sell them in the US) is described in Part 97:
http://www.arrl.org/part-97-text . Go down to 97.315 and 97.317.  The 15 dB
rule is 97.317 (2).  The history of this rule comes from preventing the use
of amateur radio amplifiers to be used in the class D Citizens Radio
Service.  

Prior to the rule change in 2006, amps could not be sold in the US that
would amplify frequencies between 24-30 MHz.  The individual ham would have
to do the modification themselves (or have someone do it for them), and
could only receive this modification information if they could prove that
they had a valid FCC Amateur Radio license. For example, my Alpha had a
numerical code sequence tied to the serial number that was given to me after
proof of licensure, one of my MFJ mobile amps had a modification kit, and
another required wiring changes.  So, two conditions had to be met - no
amplification above 24 MHz, and the amp could not have a gain of more than
15 dB.  Again, this prevented, or attempted to prevent, those in the Class D
Citizens radio service from amplifying their 5 watt transceivers to the full
amateur radio legal limit.

Blocking 24-30 MHz from amplification was a bit of a hardship and an
unnecessary rule for the amateur radio service. To simplify,  the FCC
instituted a rule change in 2006, ruling that amateur radio amplifiers just
must have zero gain from 26-28 MHz.  However, the FCC did not remove the 15
dB rule at the time of that rule change, which most agree is also totally
unnecessary.

Expert Linears and the ARRL have both petitioned the FCC to remove the 15 dB
rule.  These petitions are still currently pending FCC review and action.

Should the FCC delete the 15 dB rule, amplifier manufacturers will be able
to build amps that will only require QRP power to obtain full legal limit
power, and be able to obtain FCC type certification to sell them in the US.
The question posed was whether Elecraft will offer a modification program, a
kit or modification instructions should the 15 dB rule be deleted.  The
answer, of course, was TBD.

For Elecraft, this means a KX3 or a KX2 could be amplified to full legal
limit.

So, this is the history as I know it.  I'm sure if I have anything wrong,
There will be more reply posts on this subject than Wayne received after his
KPA1500 announcement last evening!

'73 de JIM N2ZZ

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Kevin
Cozens
Sent: Friday, April 21, 2017 5:52 PM
To: K2
Subject: Re: [Elecraft] KPA-1500: Gain Mod when FCC Lifts 15db Rule

On 2017-04-21 06:43 AM, Richard Thorne wrote:
> So if and when the FCC lifts the 15db gain rule

For those of us not in the US and subject to FCC rules, what is the FCC 15dB
rule?

--
Cheers!

Kevin.

http://www.ve3syb.ca/   |"Nerds make the shiny things that distract
Owner of Elecraft K2 #2172  | the mouth-breathers, and that's why we're
 | powerful!"
#include  | --Chris Hardwick
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Re: [Elecraft] KPA1500 feature added to KPA500

[Jack Brindle]

Marvin;

As others have noted, we have had this feature in the KPA500 since it 
originally shipped long ago.
Take a look at the KPA500 manual’s section on Transmitting. The description on 
Page 9 of the
RevC-2 manual, item 4 tells you how to set this up. Note that you must be using 
the AUXIO cable
between the KPA500 and the K3/K3S, and in the KPA500 menu, the RADIO parameter 
must be
set to K3.

Enjoy your KPA500!

Jack Brindle, W6FB
Elecraft Engineering


> On Apr 21, 2017, at 4:45 PM, Marvin Wheeler  wrote:
> 
> 
> 
> Somewhere reading the information about the new KPA1500 I read that if the
> new amp was powered on it would cause the K3/K3S to automatically lower to
> drive the amp. Can or will this feature be added to the KPA500? I would be a
> welcome addition in my opinion.
> 
> 
> 
> Marv - KG7V
> 
> 
> 
> ---
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[Elecraft] Experiences using a portable HF loop

[Eddy Avila]

Greetings all, I'm curious to hear from anyone using a portable HF magnetic 
loop. I've read the theory behind them so I'd like to hear your opinion about 
them? How efficient these antennas are, especially running qRP.


Thanks all,


73


ed
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Re: [Elecraft] KPA1500 feature added to KPA500

[Harry Yingst via Elecraft]

It already does that



  From: Marvin Wheeler 
 To: Elecraft@mailman.qth.net 
 Sent: Friday, April 21, 2017 8:05 PM
 Subject: [Elecraft] KPA1500 feature added to KPA500
   
 

Somewhere reading the information about the new KPA1500 I read that if the
new amp was powered on it would cause the K3/K3S to automatically lower to
drive the amp. Can or will this feature be added to the KPA500? I would be a
welcome addition in my opinion.

 

Marv - KG7V



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Re: [Elecraft] KPA-1500: Gain Mod when FCC Lifts 15db Rule

[Ken K6MR]

“any non-USA ham can bypass the input to enable lower drive
requirements.”

Legal for US hams also. Restriction is just on the manufacturer. You are 
responsible for your equipment.
My KPA500s are modified for lower drive (thanks to NX1P who did the hard work) 
so that I can drive two in parallel.

Ken K6MR

From: Edward R Cole
Sent: Friday, April 21, 2017 5:03 PM
To: Elecraft Reflector
Subject: Re: [Elecraft] KPA-1500: Gain Mod when FCC Lifts 15db Rule

A little more background for the FCC (USA) gain restriction for HF amplifiers:

I believe that was a result of wanting to stymie CB use of ham
amplifiers using 5-15w drive.  15-dB for 1500w implies 47w min drive.

The LDMOS being used for 1200w on 2m only require 3-4w drive; that is
26-dB gain!  Likely the devices chosen by Elecraft for their KPA1500
have similar gain so they install attenuation into the drive path or
change bias to lower gain (or both).  My guess once the schematic is
available any non-USA ham can bypass the input to enable lower drive
requirements.  A KX2 or KX3 ought to suffice.

Of course this would violate warrantee.

On a similar thought process, now that the KX3 is capable of 15w, I'm
wondering if driving the KXPA100 harder than 8w will result in higher
output?  Would it be safe to do?
I'm thinking 10w/100w.  The KXPA100 I have drives easily to 110w
saturated with about 4-5w on 80-15m, but requires 8w to achieve 70-80w at 6m.

73, Ed - KL7UW
   http://www.kl7uw.com
Dubus-NA Business mail:
   dubus...@gmail.com

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Re: [Elecraft] KPA1500 feature added to KPA500

[Ken K6MR]

It’s already there, you just have to set the drive levels one time.  When you 
adjust power, the * in the display tells you that you are adjusting the level 
when the KPA is in operate mode. If you put the KPA in standby you’ll notice 
that the * goes away and the K3 will revert to the power level you set with the 
amp off/in stby.  If you have ‘PWR SET’ to PER BAND it will remember the drive 
level on each band.  This assumes you have the amp connected to the K3 with the 
appropriate cable that passes the AuxBus messages.

Ken K6MR

From: Marvin Wheeler
Sent: Friday, April 21, 2017 4:47 PM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] KPA1500 feature added to KPA500



Somewhere reading the information about the new KPA1500 I read that if the
new amp was powered on it would cause the K3/K3S to automatically lower to
drive the amp. Can or will this feature be added to the KPA500? I would be a
welcome addition in my opinion.



Marv - KG7V



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[Elecraft] KIO3 board for K3

[Jorge Mejia P]

Hello group
Does anyone have a KIO3 board from K3 that is not in use ?, I lost the one on 
my early K3. 
If so Please contact me off the list to work out some deal. 

Thank you
Jorge HK4CZE
Sent from my iPad
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Re: [Elecraft] KPA-1500: Gain Mod when FCC Lifts 15db Rule

[Edward R Cole]

A little more background for the FCC (USA) gain restriction for HF amplifiers:

I believe that was a result of wanting to stymie CB use of ham 
amplifiers using 5-15w drive.  15-dB for 1500w implies 47w min drive.


The LDMOS being used for 1200w on 2m only require 3-4w drive; that is 
26-dB gain!  Likely the devices chosen by Elecraft for their KPA1500 
have similar gain so they install attenuation into the drive path or 
change bias to lower gain (or both).  My guess once the schematic is 
available any non-USA ham can bypass the input to enable lower drive 
requirements.  A KX2 or KX3 ought to suffice.


Of course this would violate warrantee.

On a similar thought process, now that the KX3 is capable of 15w, I'm 
wondering if driving the KXPA100 harder than 8w will result in higher 
output?  Would it be safe to do?
I'm thinking 10w/100w.  The KXPA100 I have drives easily to 110w 
saturated with about 4-5w on 80-15m, but requires 8w to achieve 70-80w at 6m.


73, Ed - KL7UW
  http://www.kl7uw.com
Dubus-NA Business mail:
  dubus...@gmail.com 


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Re: [Elecraft] KPA1500 feature added to KPA500

[Phil Hystad]

I do this now.  The memory saved values for power level are both for use with 
the
KPA500 off (standby) and on (off standby).  So, I have two saved memory values
for power level for the K3 for each condition (amp on, amp off).

73, phil, K7PEH

P.S. besides, I would hate to have the KPA500 reset my power level just because
it is on.  I may not always want the same drive with the amp.


> On Apr 21, 2017, at 4:45 PM, Marvin Wheeler  wrote:
> 
> 
> 
> Somewhere reading the information about the new KPA1500 I read that if the
> new amp was powered on it would cause the K3/K3S to automatically lower to
> drive the amp. Can or will this feature be added to the KPA500? I would be a
> welcome addition in my opinion.
> 
> 
> 
> Marv - KG7V
> 
> 
> 
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Re: [Elecraft] KPA1500 - kit?

[Nr4c]

Based on my KPA500 there really isn't much to "build" except the case and a bit 
more assembly for the PS. 

On my KPA500 I spent as much time rounding up missing screws than I did 
building. Of course, Mama E sent me the missing hardware very quickly. I wound 
up with Stainless screws from Ace Hardware on the interior and the black coated 
ones on outside locations. I have not had it open since I got it working. A 
great amp. 

I am going to sit this one out (unless I win the lottery) but you guys have 
fun!  It's about 1 to 2 $K less than I anticipated. 

Sent from my iPhone
...nr4c. bill


> On Apr 21, 2017, at 3:56 PM, Dauer, Edward  wrote:
> 
> The online Q says “Initially it will be available in Factory-built form 
> only.”  Does that mean that a kit is planned but isn’t ready yet?  Or does 
> that mean it might or might not ever be available as a kit?
> 
> I would much prefer a kit not because of any possible price saving, but 
> because building is both pleasurable and useful in terms of knowing what’s 
> going on inside.
> 
> Thanks,
> 
> Ted, KN1CBR 
> 
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Re: [Elecraft] KPA 500 vs New 1500 watt amp

[Don Wilhelm]

Children in the back seat!  "Are we there yet?" while still 3 hours away 
from the destination.  Play with your video games during "the trip"


73,
Don W3FPR

On 4/21/2017 7:35 PM, Rick WA6NHC wrote:

Is it here yet?  Is it here yet?


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[Elecraft] KPA1500 feature added to KPA500

[Marvin Wheeler]

 

Somewhere reading the information about the new KPA1500 I read that if the
new amp was powered on it would cause the K3/K3S to automatically lower to
drive the amp. Can or will this feature be added to the KPA500? I would be a
welcome addition in my opinion.

 

Marv - KG7V



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Re: [Elecraft] KPA1500

[Joe Subich, W4TV]

> Can't help you on the 13% protectionism tax.  Sorry!

Not protectionism tax ... "Nanny State" taxes.  The same Federal
(GST) and Provincial (PST) sales taxes are applied to imports as
to other products sold in the Province.

73,

   ... Joe, W4TV


On 4/21/2017 6:32 PM, Clay Autery wrote:

Yep, sure would like the Canadian dollar to hit parity with the US
dollar for a few days  You can buy your amp, and I can dump all that
Canadian silver stock.  :)

Can't help you on the 13% protectionism tax.  Sorry!

__
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389

On 4/21/2017 5:19 PM, Michael Walker wrote:

Wow..  $6K.

That will make it over $10K Canadian between the dollar exchange and the
extra 13% tax here in VE3 land.

Mike va3mw


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Re: [Elecraft] KPA 500 vs New 1500 watt amp

[Rick WA6NHC]

Is it here yet?  Is it here yet?


On 4/21/2017 2:24 PM, Wayne Burdick wrote:

Wy sooner than that, but don't quote me ;).

Wayne


http://www.elecraft.com


On Apr 21, 2017, at 1:12 PM, Nr4c  wrote:

"Christmas in "April" think not.
Note they aren't taking orders yet!  Just a list of interested potential buyers.

My timeline:
Orders-late Dec ( New Years Eve)
Ship--April 2018

Sent from my iPhone
...nr4c. bill



On Apr 21, 2017, at 11:13 AM, w7aqk  wrote:

Terry and All,

Your view is shared by a lot of us, but not everyone.  The hard core QRO folks are having a 
euphoric experience right now.  Christmas in April ! Well, I think it is great that their wishes 
seem to have been granted.  I suppose if all the stars lined up just right I could be one of them! 
However, like you, I have some difficulty justifying the cost/benefit. Also, I'd be hard pressed to 
make something like that work at this location. So, I don't need to spend a lot of time lamenting 
not having a bigger amp, and it really wouldn't help me "hear" any better.  It is not 
insignificant that it will cost almost 3 times as much to gain only slightly more than 1 S unit.  
Then, when you factor in the question of "how often do I really need that?", the 
justification becomes even more obscure to me.  One thing is for sure, a lot of electricians just 
got more work!  I strongly suspect not everyone is 220 V ready!

I think it is rather interesting how Elecraft has come to this point.  Many years ago, I saw first hand (at Pacificon) 
the two amps they had as prototypes, one of which was "legal limit".  Then they went silent for a good while 
before coming out with just the 500 watt model.  I thought that was a very astute decision, but probably because it 
suited me perfectly.  I can only guess at how this strategy evolved.  I actually expected this bigger amp to come out 
earlier, but I do not second guess Elecraft on their decision making.  They seem to be pretty capable of making very 
good decisions without my advice!!!  The groundswell of interest in a bigger amp has been hard to ignore, and obviously 
they didn't ignore it!  Then Eric tickles everyone's chain recently by asking "what would you want to see in a big 
amp?"!  That doesn't even meet the definition of "foreshadowing"!  It was more like "check your 
bank accounts folks!"

Elecraft has nearly mastered the art of stimulating expectations.  Have you 
noticed that, when something clearly doesn't fit their plans, they will quash 
the conversation, but when it isn't so far fetched the silence is deafening?  I 
think they have as much fun doing this as they do designing the stuff!  I can 
almost hear them giggling as they put together that cropped photo of the new 
amp!  Anyway, put on your crash helmets and protective gear at their booths in 
Visalia and Dayton.  It's going to be crowded!

O.K.  Now what do we talk about???

Dave W7AQK


-
From: Terry Brown 


If the new Elecraft amp is indeed 1500 watts it might be worth considering that 
going from 500 to 1500 watts is only about 4.5 Db or less than 1 S-unit in 
signal strength.  If I owned the KPA 500 it would be a hard sell to get me to 
move to ANY 1500 watt amp.

Respectfully,

Terry, N7TB
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[Elecraft] KPA1500

[Wayne Carlson, K2DT]

My new house, just finishing design phase and hopefully in for permits soon,
has a "ham nook" with dedicated 120 and 240 circuits.  That's also my
opportunity for a tower and decent antennas, so I'm excited that a KPA1500
can be in the future.  I'll miss out on intro pricing though as it'll be a
while before we're built with antennas in and I can't make good use of a
linear at the current QTH.

I'll look forward to your experience reports with it!

73, Wayne K2DT

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Re: [Elecraft] KPA-1500: Gain Mod when FCC Lifts 15db Rule

[Kevin Stover, AC0H]

This is correct.


On 4/21/2017 5:00 PM, Rick WA6NHC wrote:
It is a rule that an amplifier in the HF bands cannot have more than 
15 db gain.  This is because stupid people do stupid things here (and 
I'm sure elsewhere too).  So it was simpler to block everyone, then 
stop some.


Rick nhc


On 4/21/2017 2:51 PM, Kevin Cozens wrote:

On 2017-04-21 06:43 AM, Richard Thorne wrote:

So if and when the FCC lifts the 15db gain rule


For those of us not in the US and subject to FCC rules, what is the 
FCC 15dB rule?




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Re: [Elecraft] KPA 500 vs New 1500 watt amp

[Michael Cozzi]

Hi all,

	I have such a hard time following this conversation because... to me 
none of the debate matters.


	What matters is that Elecraft, a company that is greatly respected, has 
introduced a fabulous product.


	They are such a good company. And while I'll not be upgrading my 
KPA500/KAT500, I've got to give them credit for taking the worry and 
frustration out of buying equipment because the quality is so high.


	Maybe when I was building my station I would have gone for the KPA1500. 
Maybe.


Really- any 1500w amp is beyond what I need for my purposes.

	But you've got to hand it to Elecraft. Go ahead and hit the ball out of 
the park: Every. Single. Time.


And my praise includes the little bit of support I needed.

	So even if you do not want this amp... just celebrate it anyway. 
There's not many companies like Elecraft in or out of ham radio.


Michael- KD8TUT
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[Elecraft] [OT] Request for owner of Ameritron tuner

[Al Lorona]

In the hopes that there may be an owner of an Ameritron ATR-10 antenna tuner 
out there, would you kindly contact me off list?

Thanks very much,

Al  W6LX
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Re: [Elecraft] KPA 500 vs New 1500 watt amp

[Fred Jensen]

So I guess the former rule of thumb, "One Dollar per Watt" has met some 
unspecified death.


73,

Fred ("Skip") K6DGW
Sparks NV USA
Washoe County DM09dn



On 4/21/2017 12:30 PM, Edward R Cole wrote:

Congrats to all who have wanted a KPA1500 (I'm not currently a prospect):

Interesting misconceptions already "flying"
"1500w cost three times 500w"

KPA1500 with internal tuner = $5995
KPA500+KAT500 = $2684.95*
5995/2684.95 = 2.23
*April special price

Power requirement 240vac @ 20A = 4800w
But likely the amp will draw 1500w/0.7 = 2143w (or so) plus maybe 
200-300w for solid-state control ckts

call it 2400w in round numbers or 240v @ 10A (just my guess)

My 6m 1000w PA draws 50A @ 50v = 2500w (40% eff. with 16 transistors)
My 2m-8877 1400w PA draws 750ma @ 3700v = 2775w (50% eff. but with 
tired old tube)


20A is a convenient 240v value since breakers for that are readily 
available;  I ran about 45-feet of No. 8 wiring to bring 240vac to my 
shack where I use a 60A breaker box with a 20A breaker (only tripped a 
couple times in several years useage - HV flashover & HV transformer 
failure).


I ran my own 240v run as I tired of waiting five months for the $700 
Electrician to show up.  I think the 4 cond. No. 8 cable ran about 
$1.50/foot plus costs for 30A 240v twist lock connectors/outlets & 60A 
utility box with three breakers.  I see 2v drop on 240vac under load 
of the 8877.


KPA1500 nice design using separate 50v switching PS.  Many new ham 
radio PA's coming out that use 50v so this could be multi-use PS. I 
would like a 2m 1500w sspa using LDMOS to replace the 8877 & HVPS.  
Not looking for that from Elecraft (I will probably buy a kit from 
W6PQL).


PS: if I were in market for HF QRO the KPA1500 would be my choice!  I 
finally upgraded to the KXPA100+KXAT100 for my HF/6m needs (driven by 
either KX3 or K3/10).


73, Ed - KL7UW
  http://www.kl7uw.com
Dubus-NA Business mail:
  dubus...@gmail.com
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Re: [Elecraft] KPA 500 vs New 1500 watt amp

[Bill Johnson]

Agreed. Would like more photos and detail.  I am in and want to get one once 
released.  Working on funds to acquire.  This unit fits my needs totally.

73,
Bill
K9YEQ

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Clay 
Autery
Sent: Friday, April 21, 2017 5:36 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA 500 vs New 1500 watt amp

Cannot wait to get a look inside

There IS a handle on the left side (as you look at it).  I don't know if the 
small feet on the right side are for vertical orientation or to prevent the 
total blockage of the vents if shoved up next to another K-line product OR the 
power supply box...

__
Clay Autery, KY5G

On 4/21/2017 5:19 PM, Bill Johnson wrote:
> Ed,
>
> You only missed the fact that the heaviest part is is < 22#'s.  Wow, that is 
> one of the biggest reasons I sold my THP 2.5kfx, I could barely lift it, not 
> to mention THP is no longer in business.  I haven't seen Elecraft's circuitry 
> but with the two output devices, would seem earily similar. The design of the 
> THP output is what sold me on buying it.  Nice and compact but terrible to 
> carry.  I note there are feet on the side which implies handles.  This I 
> haven't seen mentioned.
>
> 73,
> Bill
> K9YEQ
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Re: [Elecraft] KPA 500 vs New 1500 watt amp

[Clay Autery]

Cannot wait to get a look inside

There IS a handle on the left side (as you look at it).  I don't know if
the small feet on the right side are for vertical orientation or to
prevent the total blockage of the vents if shoved up next to another
K-line product OR the power supply box...

__
Clay Autery, KY5G

On 4/21/2017 5:19 PM, Bill Johnson wrote:
> Ed,
>
> You only missed the fact that the heaviest part is is < 22#'s.  Wow, that is 
> one of the biggest reasons I sold my THP 2.5kfx, I could barely lift it, not 
> to mention THP is no longer in business.  I haven't seen Elecraft's circuitry 
> but with the two output devices, would seem earily similar. The design of the 
> THP output is what sold me on buying it.  Nice and compact but terrible to 
> carry.  I note there are feet on the side which implies handles.  This I 
> haven't seen mentioned.
>
> 73,
> Bill
> K9YEQ
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Re: [Elecraft] KPA1500

[Clay Autery]

Yep, sure would like the Canadian dollar to hit parity with the US
dollar for a few days  You can buy your amp, and I can dump all that
Canadian silver stock.  :)

Can't help you on the 13% protectionism tax.  Sorry!

__
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389

On 4/21/2017 5:19 PM, Michael Walker wrote:
> Wow..  $6K.
>
> That will make it over $10K Canadian between the dollar exchange and the
> extra 13% tax here in VE3 land.
>
> Mike va3mw

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Re: [Elecraft] KPA 1500

[Jim KO5V]

Wayne, 

Glad it's $5995 rather than $9559! 

Nice work, as usual!

73, Jim
KO5V


Message: 19

Hi Fred,

$5995, complete with internal ATU and external, lightweight switching power 
supply. See:

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

I might point out that only Elecraft offers a legal-limit amp with a 
palindromic price tag :)

73,
Wayne
N6KR
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Re: [Elecraft] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply

[Bill Johnson]

I see the internal a plus, limiting, I would expect faults when there is high 
swr.  Smart move! Safety and buyers $'s.

73,
Bill
K9YEQ

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of GRANT 
YOUNGMAN
Sent: Friday, April 21, 2017 3:00 PM
To: Elecraft Reflector 
Subject: Re: [Elecraft] New from Elecraft: KPA1500 amplifier with built-in ATU, 
separate power supply

There seems to be some disappointment that a relatively compact wide-range 
auto-tuner at legal limit CCS (or even ICAS) is not included.  I don’t consider 
this a negative.

1.  A legal limit "LOW LOSS" CCS tuner using the build methods of most typical 
ham auto-tuners would be large and heavy with BIG toroids or air-wound 
inductors and probably vacuum caps, and expensive.  The usual supposed 
wide-range high power auto stuff is ICAS at best — with the operative word 
being “Intermittent”, unless you’re trying to boil water or vaporize circuit 
board traces.

2.  There are many ways to bring any antenna/feedline's Z0 to something that a 
reasonably-sized affordable auto-tuner can handle at not too great a feed line 
SWR.  Not the least of which is to feed a commercial old fashioned mechanical 
tuner with heavy-rated components that can handle the reflected power from 
whatever bobbie-pin you’re trying to match without just melting all the plastic 
in the tuner if you key down for a bit too long.

The Drake L4B (and most well built tube amps) have wide range Pi-networks with 
heavy components (large air-wound inductors, caps, switch contacts) that can 
handle the stress of high SWR at the amplifier’s output.  But even that won’t 
successfully match anything you throw at it (well, except for the Johnson 
Ranger, but thats not the subject).  Look at the innards of an MN2000 or Millen 
92200 to get a feel for it.

In most cases you can use a (good, not fine junk) mechanical tuner (knobs you 
have to turn, meters you have to read) to set the SWR in a band to somewhere in 
the vicinity of 1:1 at the midpoint of operating interest, and most well made 
internal tuners can manage the band edges in that case — when the load is 
non-resonant and presents a high SWR.

I suspect a real auto-tuner that can handle just about anything at 1500 watts 
at key down for a long period would take at least another KPA1500 sized box.

(Just another curmudgeonly opine)


Grant NQ5T
K3 #2091, KX3 #8342



> On Apr 21, 2017, at 2:57 PM, Wes Stewart  wrote:
> 
> Without modeling it, I would guess that it will actually narrow the matched 
> BW and it makes it a single band antenna at the same time.
> 
> My Drake L4-B would drive anything.  When I decided I needed a new challenge 
> (9BDXCC) I wanted to get on 160.  Of course the Drake didn't cover 160 and my 
> then K3, now K3S doesn't have a tuner.  So I added some wire to the ends of 
> the 80-meter inverted V.  This meant that I didn't have an 80-meter antenna 
> but the Drake would drive it anyway.  Currently, with a KPA500 and KAT500 I 
> have modest power on 160 but the KAT500 chokes on 80 at above 200-300 Watts.
> 
> Hence the new vertical for next season.
> 
> On 4/21/2017 11:10 AM, j...@kk9a.com  wrote:
>> It is very easy to put a hairpin coil on your top band vertical and 
>> bring the resonant SWR to 1:1. This should give you much more usable 
>> SWR bandwidth for the KPA1500. Many commercial tube amplifiers will 
>> only tolerate 2:1 SWR.
>> 
>> John KK9A
>> 
>> 
>> 





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Re: [Elecraft] KPA 500 vs New 1500 watt amp

[Bill Johnson]

Ed,

You only missed the fact that the heaviest part is is < 22#'s.  Wow, that is 
one of the biggest reasons I sold my THP 2.5kfx, I could barely lift it, not to 
mention THP is no longer in business.  I haven't seen Elecraft's circuitry but 
with the two output devices, would seem earily similar. The design of the THP 
output is what sold me on buying it.  Nice and compact but terrible to carry.  
I note there are feet on the side which implies handles.  This I haven't seen 
mentioned.

73,
Bill
K9YEQ

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Edward R 
Cole
Sent: Friday, April 21, 2017 2:30 PM
To: Elecraft Reflector 
Subject: Re: [Elecraft] KPA 500 vs New 1500 watt amp

Congrats to all who have wanted a KPA1500 (I'm not currently a prospect):

Interesting misconceptions already "flying"
"1500w cost three times 500w"

KPA1500 with internal tuner = $5995
KPA500+KAT500 = $2684.95*
5995/2684.95 = 2.23
*April special price

Power requirement 240vac @ 20A = 4800w
But likely the amp will draw 1500w/0.7 = 2143w (or so) plus maybe 200-300w for 
solid-state control ckts call it 2400w in round numbers or 240v @ 10A (just my 
guess)

My 6m 1000w PA draws 50A @ 50v = 2500w (40% eff. with 16 transistors) My 
2m-8877 1400w PA draws 750ma @ 3700v = 2775w (50% eff. but with tired old tube)

20A is a convenient 240v value since breakers for that are readily available;  
I ran about 45-feet of No. 8 wiring to bring 240vac to my shack where I use a 
60A breaker box with a 20A breaker (only tripped a couple times in several 
years useage - HV flashover & HV transformer failure).

I ran my own 240v run as I tired of waiting five months for the $700 
Electrician to show up.  I think the 4 cond. No. 8 cable ran about $1.50/foot 
plus costs for 30A 240v twist lock connectors/outlets & 60A utility box with 
three breakers.  I see 2v drop on 240vac under load of the 8877.

KPA1500 nice design using separate 50v switching PS.  Many new ham radio PA's 
coming out that use 50v so this could be multi-use PS.  I would like a 2m 1500w 
sspa using LDMOS to replace the 8877 & HVPS.  Not looking for that from 
Elecraft (I will probably buy a kit from W6PQL).

PS: if I were in market for HF QRO the KPA1500 would be my choice!  I finally 
upgraded to the KXPA100+KXAT100 for my HF/6m needs (driven by either KX3 or 
K3/10).

73, Ed - KL7UW
   http://www.kl7uw.com
Dubus-NA Business mail:
   dubus...@gmail.com 

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Re: [Elecraft] KPA1500

[Michael Walker]

Wow..  $6K.

That will make it over $10K Canadian between the dollar exchange and the
extra 13% tax here in VE3 land.

Mike va3mw
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Re: [Elecraft] KPA1500

[Harry Yingst via Elecraft]

Reef Aquariums can also get expensive
and in that hobby only bad things happen fast



  From: Rick WA6NHC 
 To: elecraft@mailman.qth.net 
 Sent: Friday, April 21, 2017 6:10 PM
 Subject: Re: [Elecraft] KPA1500
   
Or photography... one lens costs $4000 by itself (and has maintained 
that value for ten years)... or travel, limited only by the current 
state of the wallet; the RV alone (without the tow vehicle) is worth 
double the cost of all my ham gear combined (and I have most of the K 
line with features plus other stuff), the tow vehicle is double that...

That being said, a proper station antenna system is (should be) well 
above this price point... look at the current cost of new towers 
($12-17k) before adding antennas ($1.2-5k)...

In the whole scheme of things... this is a bump, not an impediment for 
building up a serious station.  If it is something you truly want to do 
and you're going to 'do it right', you'll figure out how to get it 
done.  Are there cheaper options?  Sure, but what is the hidden cost; 
things like integration, simplicity of use (NEVER underrate that) and 
reliability factor in?

The older I get, the more I value simplicity.  Being fully integrated to 
me means, click to QSY then everything is done, make the call and is 
worth some initial 'trouble' (setup, programming, maintenance) and expense.

Will I ever build an ICBM (bigger than big gun) station?  Nope, but I 
can use what I have to make the best I can.  And THAT is some of the 
best fun you can get in ham radio, even if all you can aspire to is 
being a loud pop gun.

Rick nhc

   
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Re: [Elecraft] Problem Setting CW Offset to Zero

[Nr4c]

You have exceptional hearing in order to use a 60 KHz side tone. May it be .60 
KHz (600 Hz)?


Sent from my iPhone
...nr4c. bill


> On Apr 21, 2017, at 1:58 PM, John Stengrevics  
> wrote:
> 
> Hi Fred,
> 
> Thanks very much for the reply.
> 
> I tried the first exercise.  With VFO NOR enabled, the frequency remains 
> constant.  With VFO OFS enabled, the frequency decreases by 60 KHz which, I 
> guess, is my CW pitch.
> 
> When I am operating, and i switch from SSB to CW, I have to retune which I 
> find very inconvenient.  You can lose a weak station while trying to retune. 
> 
> So, if I understand correctly, I should enable VFO OFS so I don’t have to 
> retune?  Or, should I set my CW tone to zero?  I’m still a bit puzzled.
> 
> 73,
> 
> John
> WA1EAZ
> 
>> On Apr 21, 2017, at 12:54 PM, Cady, Fred  wrote:
>> 
>> Hi John,
>> I don't know where you are seeing 50 KHz.  The change in VFO when changing 
>> from CW to SSB should be what you have set in you CW tone.
>> 
>> Try these two exercises.
>> Exercise
>> Examine what happens when switching between CW and SSB with CW WGHT VFO set 
>> to NOR and when set to OFS.
>> Select CW mode and tune VFO A to some even CW frequency, such as 14.050.000.
>> Enter the CW WGHT menu and tap the key to select VFO NOR.
>> Exit the menu and switch between SSB and CW modes.  With VFO NOR, VFO A 
>> remains constant. 
>> Change to VFO OFS and repeat the experiment.With VFO OFS activated, the 
>> display shows 14.050.000 minus your CW pitch
>> 
>> Exercise
>> What happens if two stations are using SSB and decide to switch to CW with 
>> CW WGHT VFO OFS NOR and activated.
>> With VFO OFS NOR, each station will have to re-tune the other to hear the CW 
>> tone.  With VFO OFS activated, neither station will have to re-tune.  Each 
>> station’s VFO will be automatically offset by the pitch amount.
>> 
>> If you sometimes operate mixed mode, with you switching to CW and the other 
>> station on SSB, it is best to enable VFO OFS so the other station doesn't 
>> have to retune you when you switch from SSB to CW.
>> 
>> 73,
>> Fred KE7X
>> 
>> From: Elecraft > > on behalf of stengrevics 
>> >
>> Sent: Friday, April 21, 2017 8:52 AM
>> To: elecraft@mailman.qth.net 
>> Subject: [Elecraft] Problem Setting CW Offset to Zero
>> 
>> Reading KE7X's manual, I should be able to set the offset to zero by
>> selecting CW WGHT from the CON

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Re: [Elecraft] KPA1500 PIN diode T/R, fans

[Bill Johnson]

This is impossible to resist buying.  Sell the car, the house, the Wife... nope 
on the last.

73,
Bill
K9YEQ

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wayne 
Burdick
Sent: Friday, April 21, 2017 2:25 PM
To: Elecraft 
Subject: Re: [Elecraft] KPA1500 PIN diode T/R, fans

Hi Paul,

To protect the amp and T/R switch, we’re using heavy-duty PIN diodes, very high 
reverse voltage, and virtually instantaneous detection of high SWR. All 
possible catastrophic load scenarios have been extensively tested.

On fans:

We started with a humongous custom heat sink extrusion and thick copper 
spreader, optimized for our packaging. We also use two LDMOS devices rather 
than one, allowing heat to be distributed across all that heavy metal much more 
effectively. This slows fan onset time. (Some competing compact amps use 
inadequate heat sinking, with predictable results.)

Next, we added three large, deep fans. The center fan is controlled 
independently so it can turn on first, at low speed. In many cases that's all 
you'll ever hear. Only during high duty-cycle operation are the other two fans 
turned on. We then carefully manage the speed of all three. 

Ultimately, you have to get rid of the heat. But our goal is always to minimize 
noise. 

73,
Wayne
N6KR


> 
> *From: *"Paul Christensen" 
> 
> Wayne,
> 
> Congrats on what looks like a very well-designed amp.  I've been 
> waiting on an amp with these features for a very long time.  Of 
> particular interest to me is your continued use of PIN diode T/R 
> switching.  Can you describe SWR protection to the Rx PIN diodes at 
> the 1.5KW level?  I suspect that a fast-detecting SWR switch will be 
> the main focus of protection, as well as HV back-biasing of the Rx 
> diodes.  An open or short RF termination requires over 900V DC to keep 
> Rx PIN diodes from going into conduction.  Can you describe this area 
> of circuit protection just a bit?
> 
> Secondly, I know that fan noise is difficult to quantify in words.
> Anything
> particularly innovative you're going to minimize cooling noise?  Thanks!
> 
> Paul, W9AC
> 
> 
> 
> 
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
> 
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Re: [Elecraft] Matching range of KPA1500 Built-in Tuner

[Nr4c]

Sounds like it might be a re-packaged KAT500. 

Sent from my iPhone
...nr4c. bill


> On Apr 21, 2017, at 1:51 PM, Phil Hystad  wrote:
> 
> I must have missed something to generate the exchanges on internal and 
> external tuners and antennas with more than 3:1 SWR.
> 
> I am guessing that the matching range at 1500 watts for the KPA1500 tuner is 
> limited?  Is it similar the KAT500 which is limited to 3:1 at 1000 watts?  
> Has the SWR matching range at various power levels of the KPA1500 been 
> published somewhere?
> 
> 73, phil, K7PEH
> 
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Re: [Elecraft] KPA1500

[Bill Johnson]

It's a lot cheaper than a motorcycle of any good size quality.  Oh, I don't 
ride any way so I will take an amp, Wayne.

73,
Bill
K9YEQ

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Hunter 
Ellington
Sent: Friday, April 21, 2017 1:52 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA1500

Well, I was never advocating for an Elecraft legal limit amp, so I don't have a 
dog in this fight, but at $6K, it takes the amp out of the hobby category. I 
know things are expensive today, but this price point will be very self 
limiting.  Good luck and I hope you sell a lot of them..

Hunter Ellington, K0GFY
 Sent using Hushmail

On ‎4‎/‎21‎/‎2017 at 8:25 AM,
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Contents of Elecraft digest..."
Today's Topics:

   1. Additional KPA1500 amplifier information (James F. Boehner MD)
   2. Re: Additional KPA1500 amplifier information (Wayne Burdick)
   3. Re: [Elecraft_K3] New from Elecraft: KPA1500 amplifier with
  built-in ATU, separate power supply (Wes Stewart)
   4. Re: Additional KPA1500 amplifier information (Eric Swartz)
   5. Re: Ground rod through concrete thread?
  (Eric Swartz - WA6HHQ, Elecraft)
   6. Re: [K3] WTB: KAT500 (Petr, OK1RP/M0SIS)
   7. Re: [Elecraft_K3] New from Elecraft: KPA1500 amplifier with
  built-in ATU, separate power supply (Ken K6MR)
   8. KPA-1500: Gain Mod when FCC Lifts 15db Rule (Richard Thorne)
   9.  New from Elecraft: KPA1500 amplifier with built-in ATU,
  separate power supply (j...@kk9a.com)
  10. Elecraft insurance rate? (Mike Parkes)
  11. Re: KX3 tuner getting stuck at 25.4:1 SWR (Fred Moore)
  12. [Elecraft_K3] New from Elecraft: KPA1500 amplifier with
  built-in ATU, separate power supply (j...@kk9a.com)
  13. Re: KX3 tuner getting stuck at 25.4:1 SWR (Don Wilhelm)
  14. Re: Additional KPA1500 amplifier information (charlie carroll)
  15. KPA1500 (Greg)
  16. Re: KPA1500 (thelas...@gmail.com)
  17. Re: [Elecraft_K3] New from Elecraft: KPA1500 amplifier with
  built-in ATU, separate power supply (Wes Stewart)
  18. Re: [Elecraft_K3] New from Elecraft: KPA1500 amplifier with
  built-in ATU, separate power supply (David Bunte)
  19. Re: [Elecraft_K3] New from Elecraft: KPA1500 amplifier with
  built-in ATU, separate power supply (brian)
  20. Re: Additional KPA1500 amplifier information (Carl Yaffey1)
  21. Re: [Elecraft_K3] New from Elecraft: KPA1500 amplifier with
  built-in ATU, separate power supply (Jim Miller)
  22. Re: Additional KPA1500 amplifier information (Petr, OK1RP/M0SIS)
  23. Re: Additional KPA1500 amplifier information (Dave New, N8SBE)
  24. Re: Additional KPA1500 amplifier information (Wayne Burdick)
  25. Re: Additional KPA1500 amplifier information (Wayne Burdick)
  26. Re: Additional KPA1500 amplifier information (Wayne Burdick)
--

Message: 1
Date: Fri, 21 Apr 2017 01:11:27 -0400
From: "James F. Boehner MD" 
To: "'Wayne Burdick'" , "'Elecraft Reflector'"
Cc: ,
Subject: [Elecraft] Additional KPA1500 amplifier information
Message-ID: 
Content-Type: text/plain; charset="us-ascii"

LDMOS technology?
'73 de JIM N2ZZ

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wayne 
Burdick
Sent: Friday, April 21, 2017 12:31 AM
To: Elecraft Reflector
Cc: elecraft...@yahoogroups.com; elecr...@yahoogroups.com
Subject: [Elecraft] Additional KPA1500 amplifier information

Updated FAQ on the KPA1500:

http://www.elecraft.com/KPA1500/KPA1500%20FAQ%20rev%20A1b.pdf

High-resolution front panel photo:

http://www.elecraft.com/KPA1500/KPA1500_cropped_hi.jpg

High-resolution rear panel photo:

http://www.elecraft.com/KPA1500/KPA1500_back_rgb_hi.jpg

KPA1500 web page:

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

* * *

Wayne
N6KR
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--

Message: 2
Date: Thu, 20 Apr 2017 22:14:50 -0700
From: Wayne Burdick
To: "James F. Boehner MD" 
Cc: Elecraft Reflector ,
 elecraft...@yahoogroups.com, elecr...@yahoogroups.com
Subject: Re: [Elecraft] Additional KPA1500 amplifier information
Message-ID: 
Content-Type: text/plain; 

Re: [Elecraft] KPA-1500: Gain Mod when FCC Lifts 15db Rule

[Rick WA6NHC]

It is a rule that an amplifier in the HF bands cannot have more than 15 
db gain.  This is because stupid people do stupid things here (and I'm 
sure elsewhere too).  So it was simpler to block everyone, then stop some.


Rick nhc


On 4/21/2017 2:51 PM, Kevin Cozens wrote:

On 2017-04-21 06:43 AM, Richard Thorne wrote:

So if and when the FCC lifts the 15db gain rule


For those of us not in the US and subject to FCC rules, what is the 
FCC 15dB rule?




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[Elecraft] For Sale: KX3/PX3

[Chris Thompson]

For sale: Elecraft KX3/PX3

Excellent condition, indoor use in non-smoking shack

KX3 SN 4987 (Firmware ver MCU 2.70 / DSP 1.49)

PX3 SN 0953 (Firmware ver MCU 1.48)

 

 

KXPD3 Paddles (with extra springs)

MH3 Microphone

KXAT3 Internal Tuner

KXFL3 Roofing Filter

KXBC3 Clock/Charger

KX3-PCKT Cable Set

KXUSBa USB Cable (x 2)

Right-Angle Power Cable (x 2)

PX3CBL KX3 to PX3 Connection Cables

BNC-BP BNC to Binding Post Adapter

PAE KX31 Heat Sink

PAE 33-100 KX3 PX3 Power Splitter (one DC cable to power both)

K6VHF Right-Angle Mic/PTT Splitter

Original Manuals

Nifty Accessories Acrylic stands for both KX3 and PX3

 

Cost new before shipping (Including non-Elecraft add-ons): 

(based on Elecraft Kit pricing w/ April Specials included)

$2170.25 

 

Sell for $1650, shipped USPS Priority Mail Insured (Signature required)

 

PayPal preferred. Discount for Cash/Pickup in Greensboro, NC

 

Reason for sale: Migrated to K3

 

Contact Chris by E-mail at:

k4hc(at)northstate.net

 

73,

Chris K4HC

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Re: [Elecraft] KPA1500

[Rick WA6NHC]

Or photography... one lens costs $4000 by itself (and has maintained 
that value for ten years)... or travel, limited only by the current 
state of the wallet; the RV alone (without the tow vehicle) is worth 
double the cost of all my ham gear combined (and I have most of the K 
line with features plus other stuff), the tow vehicle is double that...


That being said, a proper station antenna system is (should be) well 
above this price point... look at the current cost of new towers 
($12-17k) before adding antennas ($1.2-5k)...


In the whole scheme of things... this is a bump, not an impediment for 
building up a serious station.  If it is something you truly want to do 
and you're going to 'do it right', you'll figure out how to get it 
done.  Are there cheaper options?  Sure, but what is the hidden cost; 
things like integration, simplicity of use (NEVER underrate that) and 
reliability factor in?


The older I get, the more I value simplicity.  Being fully integrated to 
me means, click to QSY then everything is done, make the call and is 
worth some initial 'trouble' (setup, programming, maintenance) and expense.


Will I ever build an ICBM (bigger than big gun) station?  Nope, but I 
can use what I have to make the best I can.  And THAT is some of the 
best fun you can get in ham radio, even if all you can aspire to is 
being a loud pop gun.


Rick nhc


On 4/21/2017 1:39 PM, Clay Autery wrote:

Heh, heh, heh  My radio hobby is far, far cheaper thusfar than many
of my other hobbies.  fast cars, fast bikes, fast computers,
shooting/reloading, mountainbiking

Any number of hobbies this price point would fit right nicely

Sporting Clays shooters regularly spend $5-10k or more for a shotgun.
$10k plus on a 4 wheel vehicle to haul them and their equipment around
the course...

Pay $35-50 for the privilege of ONE ROUND of birds plus another
$30-40 for one round's worth of ammo...
THOUSANDS of dollars a year for entry fees, travel, lodging, etc
just to make dust out of little bits of clay

73,

__
Clay Autery, KY5G

On 4/21/2017 1:52 PM, Hunter Ellington wrote:

Well, I was never advocating for an Elecraft legal limit amp, so I
don't have a dog in this fight, but at $6K, it takes the amp out of
the hobby category. I know things are expensive today, but this price
point will be very self limiting.  Good luck and I hope you sell a lot
of them..

Hunter Ellington, K0GFY
  Sent using Hushmail


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Re: [Elecraft] KPA-1500: Gain Mod when FCC Lifts 15db Rule

[Kevin Cozens]

On 2017-04-21 06:43 AM, Richard Thorne wrote:

So if and when the FCC lifts the 15db gain rule


For those of us not in the US and subject to FCC rules, what is the FCC 15dB 
rule?


--
Cheers!

Kevin.

http://www.ve3syb.ca/   |"Nerds make the shiny things that distract
Owner of Elecraft K2 #2172  | the mouth-breathers, and that's why we're
| powerful!"
#include  | --Chris Hardwick
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Re: [Elecraft] Elecraft insurance rate?

[Rick WA6NHC]

No, it has been documented several times by home security and cell phone 
video; using both over and under hand throws.  If your package is more 
than what you can afford to lose, insure it.


Rick nhc


On 4/21/2017 11:10 AM, ab2tc wrote:

So the notion
of UPS strongmen tossing packages around must be a myth. The same thing goes
for the post office. It has become a very competitive parcel service in
recent years.



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Re: [Elecraft] KPA 500 vs New 1500 watt amp

[Wayne Burdick]

Wy sooner than that, but don't quote me ;). 

Wayne


http://www.elecraft.com

> On Apr 21, 2017, at 1:12 PM, Nr4c  wrote:
> 
> "Christmas in "April" think not. 
> Note they aren't taking orders yet!  Just a list of interested potential 
> buyers. 
> 
> My timeline: 
> Orders-late Dec ( New Years Eve)
> Ship--April 2018
> 
> Sent from my iPhone
> ...nr4c. bill
> 
> 
>> On Apr 21, 2017, at 11:13 AM, w7aqk  wrote:
>> 
>> Terry and All,
>> 
>> Your view is shared by a lot of us, but not everyone.  The hard core QRO 
>> folks are having a euphoric experience right now.  Christmas in April ! 
>> Well, I think it is great that their wishes seem to have been granted.  I 
>> suppose if all the stars lined up just right I could be one of them! 
>> However, like you, I have some difficulty justifying the cost/benefit. Also, 
>> I'd be hard pressed to make something like that work at this location. So, I 
>> don't need to spend a lot of time lamenting not having a bigger amp, and it 
>> really wouldn't help me "hear" any better.  It is not insignificant that it 
>> will cost almost 3 times as much to gain only slightly more than 1 S unit.  
>> Then, when you factor in the question of "how often do I really need that?", 
>> the justification becomes even more obscure to me.  One thing is for sure, a 
>> lot of electricians just got more work!  I strongly suspect not everyone is 
>> 220 V ready!
>> 
>> I think it is rather interesting how Elecraft has come to this point.  Many 
>> years ago, I saw first hand (at Pacificon) the two amps they had as 
>> prototypes, one of which was "legal limit".  Then they went silent for a 
>> good while before coming out with just the 500 watt model.  I thought that 
>> was a very astute decision, but probably because it suited me perfectly.  I 
>> can only guess at how this strategy evolved.  I actually expected this 
>> bigger amp to come out earlier, but I do not second guess Elecraft on their 
>> decision making.  They seem to be pretty capable of making very good 
>> decisions without my advice!!!  The groundswell of interest in a bigger amp 
>> has been hard to ignore, and obviously they didn't ignore it!  Then Eric 
>> tickles everyone's chain recently by asking "what would you want to see in a 
>> big amp?"!  That doesn't even meet the definition of "foreshadowing"!  It 
>> was more like "check your bank accounts folks!"
>> 
>> Elecraft has nearly mastered the art of stimulating expectations.  Have you 
>> noticed that, when something clearly doesn't fit their plans, they will 
>> quash the conversation, but when it isn't so far fetched the silence is 
>> deafening?  I think they have as much fun doing this as they do designing 
>> the stuff!  I can almost hear them giggling as they put together that 
>> cropped photo of the new amp!  Anyway, put on your crash helmets and 
>> protective gear at their booths in Visalia and Dayton.  It's going to be 
>> crowded!
>> 
>> O.K.  Now what do we talk about???
>> 
>> Dave W7AQK
>> 
>> 
>> -
>> From: Terry Brown 
>> 
>> 
>> If the new Elecraft amp is indeed 1500 watts it might be worth considering 
>> that going from 500 to 1500 watts is only about 4.5 Db or less than 1 S-unit 
>> in signal strength.  If I owned the KPA 500 it would be a hard sell to get 
>> me to move to ANY 1500 watt amp.
>> 
>> Respectfully,
>> 
>> Terry, N7TB 
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Re: [Elecraft] "My" KPA1500 -not- on order (;-((

[Lynn W. Taylor, WB6UUT]

She needs a sample to work from

On 4/21/2017 1:52 PM, Ken G Kopp wrote:

Rose sez that's too many cases / covers.

73

K0PP
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Re: [Elecraft] KPA-1500: Gain Mod when FCC Lifts 15db Rule

[Oliver Dröse]

PLEASE do it!

Don't "punish" everybody outside the U.S. where this stupid limit never 
existed!


Thanks,
Olli - DH8BQA



Am 21.04.17 um 18:01 schrieb Wayne Burdick:

TBD.

Wayne
N6KR



On Apr 21, 2017, at 3:43 AM, Richard Thorne  wrote:

So if and when the FCC lifts the 15db gain rule, will there be a mod available 
to increase the gain capability so a KX3 or KX2 could drive this bad boy?

Rich - N5ZC
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[Elecraft] background audio white noise when using my K30 for remote control of my K3

[Howard Sherer]

I have recently started to run my K3 remote from my K30 again. The only
issue is a high amount of "white" noise in the background when using any
voice mode. I can reduce it to zero by bring my mic gain down from 10 to 0.
I can operate by setting my mic gain at 1 and talking very very loud into
the mic.

I have not had this problem in the past, and have RF chokes on the rear
panel mic input cable. The problem is not RF related but digitl hash
getting into the K3 rear mic input. I would appreciare any suggestions.

Thanks,
Howard Sherer AE3T
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Re: [Elecraft] KPA1500 - kit?

[Clay Autery]

Agreed...  I'd want a kit even if there was NO savings at all

I suspect there is some discussion on how to do a kit considering the
setup/calibration concerns and maybe even the whole 240VAC thing 
Having those permanently installed cable son the PS module leads me to
believe some safety concerns are on the table.

I will likely NOT be able to wait for a kit  But I will disassemble
and re-assemble just as soon as the assembly manual becomes available.

73,

__
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389

On 4/21/2017 2:56 PM, Dauer, Edward wrote:
> The online Q says “Initially it will be available in Factory-built form 
> only.”  Does that mean that a kit is planned but isn’t ready yet?  Or does 
> that mean it might or might not ever be available as a kit?
>
> I would much prefer a kit not because of any possible price saving, but 
> because building is both pleasurable and useful in terms of knowing what’s 
> going on inside.
>
> Thanks,
>
> Ted, KN1CBR

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[Elecraft] "My" KPA1500 -not- on order (;-((

[Ken G Kopp]

Rose sez that's too many cases / covers.

73

K0PP
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Re: [Elecraft] KPA1500 PIN diode T/R, fans

[Clay Autery]

Yep!!!  Thermal Design  you can bend the rules of physics, but one
cannot break them.

Yet another reason beyond packaging to put the power supply in a
separate package.

Sounds like an excellent engineering approach/trade-off.

And the three fully exposed/unobstructed fans on the back panel are
almost begging for custom ductwork to deliver nice 76 F  (24.4 C) air
supply (lightly pressurized via HVAC).  Less fan "on" time and
mitigation for fan noise... 

Lot of flexibility to supplement thermal control if you're obsessive
like me or not if you're normal like most folks.  :-)

73,

__
Clay Autery, KY5G

On 4/21/2017 2:25 PM, Wayne Burdick wrote:
> Hi Paul,
>
> To protect the amp and T/R switch, we’re using heavy-duty PIN diodes, very 
> high reverse voltage, and virtually instantaneous detection of high SWR. All 
> possible catastrophic load scenarios have been extensively tested.
>
> On fans:
>
> We started with a humongous custom heat sink extrusion and thick copper 
> spreader, optimized for our packaging. We also use two LDMOS devices rather 
> than one, allowing heat to be distributed across all that heavy metal much 
> more effectively. This slows fan onset time. (Some competing compact amps use 
> inadequate heat sinking, with predictable results.)
>
> Next, we added three large, deep fans. The center fan is controlled 
> independently so it can turn on first, at low speed. In many cases that's all 
> you'll ever hear. Only during high duty-cycle operation are the other two 
> fans turned on. We then carefully manage the speed of all three. 
>
> Ultimately, you have to get rid of the heat. But our goal is always to 
> minimize noise. 
>
> 73,
> Wayne
> N6KR
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Re: [Elecraft] Delivery time for KPA1500

[Paul Van Dyke]

Laughing, Ken . if I could, I would,  but I've been put on the list
just like you. We'll see how it shakes out

Paul KB9AVO

K2 # 
   can't remember off the top of my head
K3 #1460
K3s  #11,xxx
   can't remember off the top of my head
KX3 #24
KX2 #38
KXPA100  #22

On Apr 21, 2017 4:27 PM, "Ken G Kopp"  wrote:

> Placed my order for a then unseen K3
> on the Friday night it was announced at Visalia some years ago ... just
> like this KPA1500.  Took seven months for delivery of S/N 0056, so ya
> better get your order in. (:-))
>
> 73!
>
> Ken - K0PP
> K2 #5665
> K3 #0056
> P3 #0056
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Re: [Elecraft] KPA1500

[Clay Autery]

Heh, heh, heh  My radio hobby is far, far cheaper thusfar than many
of my other hobbies.  fast cars, fast bikes, fast computers,
shooting/reloading, mountainbiking

Any number of hobbies this price point would fit right nicely

Sporting Clays shooters regularly spend $5-10k or more for a shotgun. 
$10k plus on a 4 wheel vehicle to haul them and their equipment around
the course...

Pay $35-50 for the privilege of ONE ROUND of birds plus another
$30-40 for one round's worth of ammo...
THOUSANDS of dollars a year for entry fees, travel, lodging, etc 
just to make dust out of little bits of clay

73,

__
Clay Autery, KY5G

On 4/21/2017 1:52 PM, Hunter Ellington wrote:
> Well, I was never advocating for an Elecraft legal limit amp, so I
> don't have a dog in this fight, but at $6K, it takes the amp out of
> the hobby category. I know things are expensive today, but this price
> point will be very self limiting.  Good luck and I hope you sell a lot
> of them..
>
> Hunter Ellington, K0GFY
>  Sent using Hushmail
>
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[Elecraft] Delivery time for KPA1500

[Ken G Kopp]

Placed my order for a then unseen K3
on the Friday night it was announced at Visalia some years ago ... just
like this KPA1500.  Took seven months for delivery of S/N 0056, so ya
better get your order in. (:-))

73!

Ken - K0PP
K2 #5665
K3 #0056
P3 #0056
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Re: [Elecraft] KPA 500 vs New 1500 watt amp

[Nr4c]

"Christmas in "April" think not. 
Note they aren't taking orders yet!  Just a list of interested potential 
buyers. 

My timeline: 
Orders-late Dec ( New Years Eve)
Ship--April 2018

Sent from my iPhone
...nr4c. bill


> On Apr 21, 2017, at 11:13 AM, w7aqk  wrote:
> 
> Terry and All,
> 
> Your view is shared by a lot of us, but not everyone.  The hard core QRO 
> folks are having a euphoric experience right now.  Christmas in April ! Well, 
> I think it is great that their wishes seem to have been granted.  I suppose 
> if all the stars lined up just right I could be one of them! However, like 
> you, I have some difficulty justifying the cost/benefit. Also, I'd be hard 
> pressed to make something like that work at this location. So, I don't need 
> to spend a lot of time lamenting not having a bigger amp, and it really 
> wouldn't help me "hear" any better.  It is not insignificant that it will 
> cost almost 3 times as much to gain only slightly more than 1 S unit.  Then, 
> when you factor in the question of "how often do I really need that?", the 
> justification becomes even more obscure to me.  One thing is for sure, a lot 
> of electricians just got more work!  I strongly suspect not everyone is 220 V 
> ready!
> 
> I think it is rather interesting how Elecraft has come to this point.  Many 
> years ago, I saw first hand (at Pacificon) the two amps they had as 
> prototypes, one of which was "legal limit".  Then they went silent for a good 
> while before coming out with just the 500 watt model.  I thought that was a 
> very astute decision, but probably because it suited me perfectly.  I can 
> only guess at how this strategy evolved.  I actually expected this bigger amp 
> to come out earlier, but I do not second guess Elecraft on their decision 
> making.  They seem to be pretty capable of making very good decisions without 
> my advice!!!  The groundswell of interest in a bigger amp has been hard to 
> ignore, and obviously they didn't ignore it!  Then Eric tickles everyone's 
> chain recently by asking "what would you want to see in a big amp?"!  That 
> doesn't even meet the definition of "foreshadowing"!  It was more like "check 
> your bank accounts folks!"
> 
> Elecraft has nearly mastered the art of stimulating expectations.  Have you 
> noticed that, when something clearly doesn't fit their plans, they will quash 
> the conversation, but when it isn't so far fetched the silence is deafening?  
> I think they have as much fun doing this as they do designing the stuff!  I 
> can almost hear them giggling as they put together that cropped photo of the 
> new amp!  Anyway, put on your crash helmets and protective gear at their 
> booths in Visalia and Dayton.  It's going to be crowded!
> 
> O.K.  Now what do we talk about???
> 
> Dave W7AQK
> 
> 
> -
> From: Terry Brown 
> 
> 
> If the new Elecraft amp is indeed 1500 watts it might be worth considering 
> that going from 500 to 1500 watts is only about 4.5 Db or less than 1 S-unit 
> in signal strength.  If I owned the KPA 500 it would be a hard sell to get me 
> to move to ANY 1500 watt amp.
> 
> Respectfully,
> 
> Terry, N7TB 
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Re: [Elecraft] KPA1500 - kit?

[Paul Van Dyke]

Ted, I have a vast suspicion that they will not offer it as a kit right off
the bat as they want an initial shakedown and then make sure everything
works as it's supposed to. And also see where the most ease of assembly
might be. Obviously not elecraft employee or any of the above but having
beta tested a couple of the different rigs  it only makes sensePaul
KB9AVO

On Apr 21, 2017 3:57 PM, "Dauer, Edward"  wrote:

> The online Q says “Initially it will be available in Factory-built form
> only.”  Does that mean that a kit is planned but isn’t ready yet?  Or does
> that mean it might or might not ever be available as a kit?
>
> I would much prefer a kit not because of any possible price saving, but
> because building is both pleasurable and useful in terms of knowing what’s
> going on inside.
>
> Thanks,
>
> Ted, KN1CBR
>
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Re: [Elecraft] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply

[GRANT YOUNGMAN]

There seems to be some disappointment that a relatively compact wide-range 
auto-tuner at legal limit CCS (or even ICAS) is not included.  I don’t consider 
this a negative.

1.  A legal limit "LOW LOSS" CCS tuner using the build methods of most typical 
ham auto-tuners would be large and heavy with BIG toroids or air-wound 
inductors and probably vacuum caps, and expensive.  The usual supposed 
wide-range high power auto stuff is ICAS at best — with the operative word 
being “Intermittent”, unless you’re trying to boil water or vaporize circuit 
board traces.

2.  There are many ways to bring any antenna/feedline's Z0 to something that a 
reasonably-sized affordable auto-tuner can handle at not too great a feed line 
SWR.  Not the least of which is to feed a commercial old fashioned mechanical 
tuner with heavy-rated components that can handle the reflected power from 
whatever bobbie-pin you’re trying to match without just melting all the plastic 
in the tuner if you key down for a bit too long.

The Drake L4B (and most well built tube amps) have wide range Pi-networks with 
heavy components (large air-wound inductors, caps, switch contacts) that can 
handle the stress of high SWR at the amplifier’s output.  But even that won’t 
successfully match anything you throw at it (well, except for the Johnson 
Ranger, but thats not the subject).  Look at the innards of an MN2000 or Millen 
92200 to get a feel for it.

In most cases you can use a (good, not fine junk) mechanical tuner (knobs you 
have to turn, meters you have to read) to set the SWR in a band to somewhere in 
the vicinity of 1:1 at the midpoint of operating interest, and most well made 
internal tuners can manage the band edges in that case — when the load is 
non-resonant and presents a high SWR.

I suspect a real auto-tuner that can handle just about anything at 1500 watts 
at key down for a long period would take at least another KPA1500 sized box.

(Just another curmudgeonly opine)


Grant NQ5T
K3 #2091, KX3 #8342



> On Apr 21, 2017, at 2:57 PM, Wes Stewart  wrote:
> 
> Without modeling it, I would guess that it will actually narrow the matched 
> BW and it makes it a single band antenna at the same time.
> 
> My Drake L4-B would drive anything.  When I decided I needed a new challenge 
> (9BDXCC) I wanted to get on 160.  Of course the Drake didn't cover 160 and my 
> then K3, now K3S doesn't have a tuner.  So I added some wire to the ends of 
> the 80-meter inverted V.  This meant that I didn't have an 80-meter antenna 
> but the Drake would drive it anyway.  Currently, with a KPA500 and KAT500 I 
> have modest power on 160 but the KAT500 chokes on 80 at above 200-300 Watts.
> 
> Hence the new vertical for next season.
> 
> On 4/21/2017 11:10 AM, j...@kk9a.com  wrote:
>> It is very easy to put a hairpin coil on your top band vertical and bring
>> the resonant SWR to 1:1. This should give you much more usable SWR
>> bandwidth for the KPA1500. Many commercial tube amplifiers will only
>> tolerate 2:1 SWR.
>> 
>> John KK9A
>> 
>> 
>> 





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[Elecraft] KPA1500 - kit?

[Dauer, Edward]

The online Q says “Initially it will be available in Factory-built form 
only.”  Does that mean that a kit is planned but isn’t ready yet?  Or does that 
mean it might or might not ever be available as a kit?

I would much prefer a kit not because of any possible price saving, but because 
building is both pleasurable and useful in terms of knowing what’s going on 
inside.

Thanks,

Ted, KN1CBR 

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Re: [Elecraft] KPA 500 vs New 1500 watt amp

[Edward R Cole]

Congrats to all who have wanted a KPA1500 (I'm not currently a prospect):

Interesting misconceptions already "flying"
"1500w cost three times 500w"

KPA1500 with internal tuner = $5995
KPA500+KAT500 = $2684.95*
5995/2684.95 = 2.23
*April special price

Power requirement 240vac @ 20A = 4800w
But likely the amp will draw 1500w/0.7 = 2143w (or so) plus maybe 
200-300w for solid-state control ckts

call it 2400w in round numbers or 240v @ 10A (just my guess)

My 6m 1000w PA draws 50A @ 50v = 2500w (40% eff. with 16 transistors)
My 2m-8877 1400w PA draws 750ma @ 3700v = 2775w (50% eff. but with 
tired old tube)


20A is a convenient 240v value since breakers for that are readily 
available;  I ran about 45-feet of No. 8 wiring to bring 240vac to my 
shack where I use a 60A breaker box with a 20A breaker (only tripped 
a couple times in several years useage - HV flashover & HV 
transformer failure).


I ran my own 240v run as I tired of waiting five months for the $700 
Electrician to show up.  I think the 4 cond. No. 8 cable ran about 
$1.50/foot plus costs for 30A 240v twist lock connectors/outlets & 
60A utility box with three breakers.  I see 2v drop on 240vac under 
load of the 8877.


KPA1500 nice design using separate 50v switching PS.  Many new ham 
radio PA's coming out that use 50v so this could be multi-use PS.  I 
would like a 2m 1500w sspa using LDMOS to replace the 8877 & 
HVPS.  Not looking for that from Elecraft (I will probably buy a kit 
from W6PQL).


PS: if I were in market for HF QRO the KPA1500 would be my choice!  I 
finally upgraded to the KXPA100+KXAT100 for my HF/6m needs (driven by 
either KX3 or K3/10).


73, Ed - KL7UW
  http://www.kl7uw.com
Dubus-NA Business mail:
  dubus...@gmail.com 


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Re: [Elecraft] KPA1500 PIN diode T/R, fans

[Wayne Burdick]

Hi Paul,

To protect the amp and T/R switch, we’re using heavy-duty PIN diodes, very high 
reverse voltage, and virtually instantaneous detection of high SWR. All 
possible catastrophic load scenarios have been extensively tested.

On fans:

We started with a humongous custom heat sink extrusion and thick copper 
spreader, optimized for our packaging. We also use two LDMOS devices rather 
than one, allowing heat to be distributed across all that heavy metal much more 
effectively. This slows fan onset time. (Some competing compact amps use 
inadequate heat sinking, with predictable results.)

Next, we added three large, deep fans. The center fan is controlled 
independently so it can turn on first, at low speed. In many cases that's all 
you'll ever hear. Only during high duty-cycle operation are the other two fans 
turned on. We then carefully manage the speed of all three. 

Ultimately, you have to get rid of the heat. But our goal is always to minimize 
noise. 

73,
Wayne
N6KR


> 
> *From: *"Paul Christensen" 
> 
> Wayne,
> 
> Congrats on what looks like a very well-designed amp.  I've been
> waiting on
> an amp with these features for a very long time.  Of particular
> interest to
> me is your continued use of PIN diode T/R switching.  Can you describe SWR
> protection to the Rx PIN diodes at the 1.5KW level?  I suspect that a
> fast-detecting SWR switch will be the main focus of protection, as well as
> HV back-biasing of the Rx diodes.  An open or short RF termination
> requires
> over 900V DC to keep Rx PIN diodes from going into conduction.  Can you
> describe this area of circuit protection just a bit?
> 
> Secondly, I know that fan noise is difficult to quantify in words.
> Anything
> particularly innovative you're going to minimize cooling noise?  Thanks!
> 
> Paul, W9AC
> 
> 
> 
> 
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
> 
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Re: [Elecraft] Elecraft insurance rate?

[Joe Subich, W4TV]

On 4/21/2017 2:10 PM, ab2tc wrote:

BTW I have *never* have anything shipped to or from me damaged or
lost. Not even a scratch to the shipping carton.


You have been extremely lucky.  I have, on the average, one parcel
a year lost or stolen in shipment - particularly foreign shipments -
to the extent that I will not ship to certain countries and require
insurance on all shipments.

Now that Elecraft are shipping more service work and higher value
(think KPA500/KPA1500) products, it makes a lot of sense to use
either carrier or third party insurance rather than absorb the
loss.

73,

   ... Joe, W4TV


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Re: [Elecraft] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply

[ab2tc]

Hi Wayne/Eric and all,

Congratulations; it looks you have done what everybody wanted. Do you have
any data on IMD at the 1500W level? I have been pleading with you in the
past to take the lead in improving the miserable record of solid state PA
stages. Is it happening?

AB2TC - Knut



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Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply

[Wes Stewart]

Without modeling it, I would guess that it will actually narrow the matched BW 
and it makes it a single band antenna at the same time.


My Drake L4-B would drive anything.  When I decided I needed a new challenge 
(9BDXCC) I wanted to get on 160.  Of course the Drake didn't cover 160 and my 
then K3, now K3S doesn't have a tuner.  So I added some wire to the ends of the 
80-meter inverted V.  This meant that I didn't have an 80-meter antenna but the 
Drake would drive it anyway.  Currently, with a KPA500 and KAT500 I have modest 
power on 160 but the KAT500 chokes on 80 at above 200-300 Watts.


Hence the new vertical for next season.

On 4/21/2017 11:10 AM, j...@kk9a.com wrote:

It is very easy to put a hairpin coil on your top band vertical and bring
the resonant SWR to 1:1. This should give you much more usable SWR
bandwidth for the KPA1500. Many commercial tube amplifiers will only
tolerate 2:1 SWR.

John KK9A


>From Wes Stewart n7ws
Fri Apr 21 13:11:12 EDT 2017

I'm not necessarily defining a personal situation.  But almost any 80 or 160
antenna will suffice as an example.

I am currently constructing a vertical for those bands.  The model shows
2:1 on
160 at resonance and >3:1 just 60 KHz away and this is with considerable
ground
loss.  Less loss would equal lower BW.  With quarter wave resonance on 80
at 3.6
MHz it exceeds 3:1 at 3.8 MHz and is nearly 7:1 at 4.0.

Transmission line loss is a non-issue with 7/8" Heliax.

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Re: [Elecraft] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply

[Jessie Oberreuter]

 I have to keep physically restraining myself from placing an order 
just for the pleasure of owning one!  It's *just* *so* *Elecraft*! :).


- kb7psg

On Fri, 21 Apr 2017, Clay Autery wrote:


Wayne, Eric, and everyone else who had/has a hand in making this happen:

Well done!  Simply superb effort to overcome multiple and significant
obstacles on many fronts.

Please, do place me on the list of folks keenly interested in knowing
when one might place an order/pre-order.  :-)

Out-friggin'-standing!!

73,

__
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Re: [Elecraft] KPA1500

[Hunter Ellington]

Well, I was never advocating for an Elecraft legal limit amp, so I
don't have a dog in this fight, but at $6K, it takes the amp out of
the hobby category. I know things are expensive today, but this price
point will be very self limiting.  Good luck and I hope you sell a lot
of them..

Hunter Ellington, K0GFY
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of Elecraft digest..."
Today's Topics:

   1. Additional KPA1500 amplifier information (James F. Boehner MD)
   2. Re: Additional KPA1500 amplifier information (Wayne Burdick)
   3. Re: [Elecraft_K3] New from Elecraft: KPA1500 amplifier with
  built-in ATU, separate power supply (Wes Stewart)
   4. Re: Additional KPA1500 amplifier information (Eric Swartz)
   5. Re: Ground rod through concrete thread?
  (Eric Swartz - WA6HHQ, Elecraft)
   6. Re: [K3] WTB: KAT500 (Petr, OK1RP/M0SIS)
   7. Re: [Elecraft_K3] New from Elecraft: KPA1500 amplifier with
  built-in ATU, separate power supply (Ken K6MR)
   8. KPA-1500: Gain Mod when FCC Lifts 15db Rule (Richard Thorne)
   9.  New from Elecraft: KPA1500 amplifier with built-in ATU,
  separate power supply (j...@kk9a.com)
  10. Elecraft insurance rate? (Mike Parkes)
  11. Re: KX3 tuner getting stuck at 25.4:1 SWR (Fred Moore)
  12. [Elecraft_K3] New from Elecraft: KPA1500 amplifier with
  built-in ATU, separate power supply (j...@kk9a.com)
  13. Re: KX3 tuner getting stuck at 25.4:1 SWR (Don Wilhelm)
  14. Re: Additional KPA1500 amplifier information (charlie carroll)
  15. KPA1500 (Greg)
  16. Re: KPA1500 (thelas...@gmail.com)
  17. Re: [Elecraft_K3] New from Elecraft: KPA1500 amplifier with
  built-in ATU, separate power supply (Wes Stewart)
  18. Re: [Elecraft_K3] New from Elecraft: KPA1500 amplifier with
  built-in ATU, separate power supply (David Bunte)
  19. Re: [Elecraft_K3] New from Elecraft: KPA1500 amplifier with
  built-in ATU, separate power supply (brian)
  20. Re: Additional KPA1500 amplifier information (Carl Yaffey1)
  21. Re: [Elecraft_K3] New from Elecraft: KPA1500 amplifier with
  built-in ATU, separate power supply (Jim Miller)
  22. Re: Additional KPA1500 amplifier information (Petr, OK1RP/M0SIS)
  23. Re: Additional KPA1500 amplifier information (Dave New, N8SBE)
  24. Re: Additional KPA1500 amplifier information (Wayne Burdick)
  25. Re: Additional KPA1500 amplifier information (Wayne Burdick)
  26. Re: Additional KPA1500 amplifier information (Wayne Burdick)
--

Message: 1
Date: Fri, 21 Apr 2017 01:11:27 -0400
From: "James F. Boehner MD" 
To: "'Wayne Burdick'" , "'Elecraft Reflector'"
Cc: , 
Subject: [Elecraft] Additional KPA1500 amplifier information
Message-ID: 
Content-Type: text/plain; charset="us-ascii"

LDMOS technology?
'73 de JIM N2ZZ

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
Wayne
Burdick
Sent: Friday, April 21, 2017 12:31 AM
To: Elecraft Reflector
Cc: elecraft...@yahoogroups.com; elecr...@yahoogroups.com
Subject: [Elecraft] Additional KPA1500 amplifier information

Updated FAQ on the KPA1500:

http://www.elecraft.com/KPA1500/KPA1500%20FAQ%20rev%20A1b.pdf

High-resolution front panel photo:

http://www.elecraft.com/KPA1500/KPA1500_cropped_hi.jpg

High-resolution rear panel photo:

http://www.elecraft.com/KPA1500/KPA1500_back_rgb_hi.jpg

KPA1500 web page:

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

* * *

Wayne
N6KR
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--

Message: 2
Date: Thu, 20 Apr 2017 22:14:50 -0700
From: Wayne Burdick 
To: "James F. Boehner MD" 
Cc: Elecraft Reflector ,
 elecraft...@yahoogroups.com, elecr...@yahoogroups.com
Subject: Re: [Elecraft] Additional KPA1500 amplifier information
Message-ID: 
Content-Type: text/plain; charset=us-ascii

Yup. 50 volt devices with plenty of thermal margin. 

Wayne
N6KR
> On Apr 20, 2017, at 10:11 PM, James F. Boehner MD  wrote:
> 
> LDMOS technology?
> 
> 
> '73 de JIM N2ZZ
--

Message: 3
Date: Thu, 20 Apr 2017 22:18:59 -0700
From: Wes Stewart 
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] [Elecraft_K3] 

Re: [Elecraft] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply

[Wayne Burdick]

Hi Clay,

You're on the list. Thanks!

Wayne
N6KR



http://www.elecraft.com

> On Apr 21, 2017, at 10:44 AM, Clay Autery  wrote:
> 
> Wayne, Eric, and everyone else who had/has a hand in making this happen:
> 
> Well done!  Simply superb effort to overcome multiple and significant
> obstacles on many fronts.
> 
> Please, do place me on the list of folks keenly interested in knowing
> when one might place an order/pre-order.  :-)
> 
> Out-friggin'-standing!!
> 
> 73,
> 
> __
> Clay Autery, KY5G
> 
>> On 4/20/2017 11:01 PM, Wayne Burdick wrote:
>> We’re pleased to announce our KPA1500 solid-state amplifier, covering 160 to 
>> 6 meters. Max power output is 1500 Watts. Other important features include:
>> 
>>  - Small RF deck fits on nearly any desktop (~4.5 x 13 x 11.5”, HWD); weighs 
>> only ~22 pounds
>>  - Separate lightweight switching power supply weighs ~15 pounds (standard 
>> cable is 6 feet long)
>>  - Styling matches our other K-Line products
>>  - Built-in wide-range antenna tuner (ATU) with instant recall of 
>> per-band/per-segment settings
>>  - Dual antenna jacks
>>  - Rich I/O complement including Ethernet
>>  - Interfaces to nearly any transceiver; fully integrated with K3 and K3S
>>  - Extensive parametric monitoring ensures safe operation
>>  - Silent PIN-diode T/R switching (no QSK relays)
>> 
>> Introductory price: $5995.
>> 
>> For photos and additional information, use the links below:
>> 
>>   http://www.elecraft.com/KPA1500/KPA1500%20FAQ%20rev%20A1b.pdf
>> 
>> 
>> If you’d like to be notified when we begin taking orders, please contact 
>> Elecraft. Or add your name to the list at the Visalia DX convention this 
>> weekend. 
>> 
>> Required notification: "This device has not yet been authorized as required 
>> by FCC rules. It is not, and may not be
>> offered for sale, or lease, or sold or leased, until authorization is 
>> obtained."
>> 
>> 73,
>> Wayne, N6KR
>> Eric, WA6HHQ
> 
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Re: [Elecraft] Elecraft insurance rate?

[George Thornton]

I have not looked at this in recent years but it used to be you declare value 
so the shipper can set rates for insurance.  They are going to charge more for 
something that is hugely valuable.

To me the problem is not so much damage in transit but loss of the package.

I have had two incidents at my home where things went awry.  In one case they 
said a package was delivered, but I never saw it.  On another occasion (just 
this week) a package was left at the wrong address.  Fortunately, my neighbor 
saw that and brought it over so there was no loss.

There is less risk of a package being misdelivered when a signature is required.

If a package is misdelivered, who is to say what happened.  The shipper will 
not admit to misdelivery, and it may come down to a mysterious criminal 
stealing it from your doorstep.

From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of ab2tc
Sent: Friday, April 21, 2017 11:10 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Elecraft insurance rate?

Hi,

I am aware of the UPS calling their insurance "declared value". Can somebody
enlighten me as to what it means? Literature by UPS is very adamant that
"declared value" is not insurance. Then exactly what is it? My expectation
is that if the package is damaged or lost I will receive fair compensation
up to the "declared value".

On the topic of Elecraft's new insurance charges, I have been told by
somebody at Elecraft in the past that they are "self insured". I take that
to mean that they will take their chances and absorb the loss if a package
is damaged or lost. It may very well make economic sense for large shipping
volumes in the long run. BTW I have *never* have anything shipped to or from
me damaged or lost. Not even a scratch to the shipping carton. So the notion
of UPS strongmen tossing packages around must be a myth. The same thing goes
for the post office. It has become a very competitive parcel service in
recent years.

AB2TC


Grant Youngman-2 wrote
> The only “oracle" required is, for example, the UPS website (or whatever
> shipper you choose) —
> https://www.ups.com/media/en/value-added_pricing_daily.pdf
> https://www.ups.com/media/en/value-added_pricing_daily.pdf;.
>
> 90 cents per $100 in excess of the initial $100 is the standard rate for
> “declared value” on UPS. YMMV.
> 





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Re: [Elecraft] KPA 500 vs New 1500 watt amp

[Dr. William J. Schmidt]

Ah!  Someone gets it!


Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
 
Owner - Operator
Big Signal Ranch – K9ZC
Staunton, Illinois
 
Owner – Operator
Villa Grand Piton - J68HZ
Soufriere, St. Lucia W.I.
Rent it: www.VillaGrandPiton.com

email:  b...@wjschmidt.com
 

> On Apr 21, 2017, at 10:21 AM, GWK  wrote:
> 
> And the reason you "need" the extra 1000 W is that the others in the pileup 
> are all running max power.  A typical arms race, with tempers to match.
> 
> George, W3HBM
> 
>> On 4/20/2017 9:39 PM, Dr. William J. Schmidt, II wrote:
>> Well you might consider this.  I do a lot of DXing from J6.  Typically the
>> pile-ups are hundreds if not more people calling once it gets going.  That 1
>> s-unit difference can mean the difference between working the DX or the band
>> going out before you do.   It's personal, right?  Kinda of reminds me of the
>> "I really don't need the horsepower of a corvette" argument.  Yep, maybe you
>> don't and we all can't be driving corvettes.  But having one SURE IS FUN!
>> 
>> 
>> Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
>> 
>> Owner - Operator
>> Big Signal Ranch - K9ZC
>> Staunton, Illinois
>> 
>> Owner - Operator
>> Villa Grand Piton - J68HZ
>> Soufriere, St. Lucia W.I.
>> Rent it: www.VillaGrandPiton.com
>> Like us on Facebook!
>> 
>> 
>> email:  b...@wjschmidt.com
>> 
>> 
>> -Original Message-
>> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Terry
>> Brown
>> Sent: Thursday, April 20, 2017 8:12 PM
>> To: elecraft@mailman.qth.net
>> Subject: [Elecraft] KPA 500 vs New 1500 watt amp
>> 
>> If the new Elecraft amp is indeed 1500 watts it might be worth considering
>> that going from 500 to 1500 watts is only about 4.5 Db or less than 1 S-unit
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[Elecraft] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply

[j...@kk9a.com]

It is very easy to put a hairpin coil on your top band vertical and bring
the resonant SWR to 1:1. This should give you much more usable SWR
bandwidth for the KPA1500. Many commercial tube amplifiers will only
tolerate 2:1 SWR.

John KK9A


>From Wes Stewart n7ws
Fri Apr 21 13:11:12 EDT 2017

I'm not necessarily defining a personal situation.  But almost any 80 or 160
antenna will suffice as an example.

I am currently constructing a vertical for those bands.  The model shows
2:1 on
160 at resonance and >3:1 just 60 KHz away and this is with considerable
ground
loss.  Less loss would equal lower BW.  With quarter wave resonance on 80
at 3.6
MHz it exceeds 3:1 at 3.8 MHz and is nearly 7:1 at 4.0.

Transmission line loss is a non-issue with 7/8" Heliax.

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Re: [Elecraft] Elecraft insurance rate?

[ab2tc]

Hi,

I am aware of the UPS calling their insurance "declared value". Can somebody
enlighten me as to what it means? Literature by UPS is very adamant that
"declared value" is not insurance. Then exactly what is it? My expectation
is that if the package is damaged or lost I will receive fair compensation
up to the "declared value".

On the topic of Elecraft's new insurance charges, I have been told by
somebody at Elecraft in the past that they are "self insured". I take that
to mean that they will take their chances and absorb the loss if a package
is damaged or lost. It may very well make economic sense for large shipping
volumes in the long run. BTW I have *never* have anything shipped to or from
me damaged or lost. Not even a scratch to the shipping carton. So the notion
of UPS strongmen tossing packages around must be a myth. The same thing goes
for the post office. It has become a very competitive parcel service in
recent years.

AB2TC


Grant Youngman-2 wrote
> The only “oracle" required is, for example, the UPS website (or whatever
> shipper you choose) —
> https://www.ups.com/media/en/value-added_pricing_daily.pdf
> https://www.ups.com/media/en/value-added_pricing_daily.pdf;.  
> 
> 90 cents per $100 in excess of the initial $100 is the standard rate for
> “declared value” on UPS.  YMMV.
> 





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Re: [Elecraft] Matching range of KPA1500 Built-in Tuner

[Wes Stewart]

From the FAQ:

The amplifier’s rugged internal ATU can handle full power with load SWR up to 
3:1, while a wider matching range is allowed at lower power levels, including up 
to 10:1 in standby mode.


On 4/21/2017 10:51 AM, Phil Hystad wrote:

I must have missed something to generate the exchanges on internal and external 
tuners and antennas with more than 3:1 SWR.

I am guessing that the matching range at 1500 watts for the KPA1500 tuner is 
limited?  Is it similar the KAT500 which is limited to 3:1 at 1000 watts?  Has 
the SWR matching range at various power levels of the KPA1500 been published 
somewhere?

73, phil, K7PEH

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Re: [Elecraft] KPA 500 vs New 1500 watt amp

[mfsj]

Very competitive price for the quality of amp.
73,Fred/N0AZZ
 Original message From: Wayne Burdick  Date: 
4/21/17  12:00 PM  (GMT-06:00) To: Fred Smith  Cc: Roy 
Koeppe , Elecraft Reflector  Subject: 
Re: [Elecraft] KPA 500 vs New 1500 watt amp 
Hi Fred,

$5995, complete with internal ATU and external, lightweight switching power 
supply. See:

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

I might point out that only Elecraft offers a legal-limit amp with a 
palindromic price tag :)

73,
Wayne
N6KR


> On Apr 21, 2017, at 9:56 AM, Fred Smith  wrote:
> 
> Wayne I'm a bit late on this thread but will the cost be in the $5-6K range?
> 
> 
> 73,
> Fred/N0AZZ
> K3 Ser # 6730--KX3 # 5210--K2/100 # 6470-KAT100
> P3/SVGA--KAT500--W2
> Amps Elecraft KPA500 HF/6m--Alpha's 9500 HF--87A HF--Mirage B-5030-G 
> 300+w--(2) B-5016-G's 165w 2m
> 
> 
> 
> -Original Message-
> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wayne 
> Burdick
> Sent: Friday, April 21, 2017 11:31 AM
> To: Roy Koeppe
> Cc: Elecraft Reflector
> Subject: Re: [Elecraft] KPA 500 vs New 1500 watt amp
> 
> Our philosophy at Elecraft is to cover both ends of the spectrum. 
> Figuratively speaking.
> 
> When the bands are open, the birds are singing, and the sun is shining, 
> you’ll find us outdoors using a hand-held KX2 at 10 watts with a whip. But 
> late at night, when propagation is in the tank and that rare DX station peeks 
> over the horizon for a once-in-a-lifetime fleeting moment, seconds count and 
> size really does matter. At these times, we flip the big switch.
> 
> Wayne
> N6KR
> 
> 
> 
>> On Apr 21, 2017, at 9:02 AM, Roy Koeppe  wrote:
>> 
>> 
>> Aboot:
>> 
>> "And the reason you "need" the extra 1000 W is that the others in the 
>> pileup are all running max power.  A typical arms race, with tempers 
>> to match."
>> 
>> 
>> Apparently none of you here ragchews on 80M CW roundtables at sunrise times 
>> during spring/summer thunderstorms seasons across the country! That's the 
>> reason QRO was born...
>> 
>> 73,  Roy   K6XK Iowa 
>> 
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>> n...@elecraft.com
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> 
> 


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Re: [Elecraft] Problem Setting CW Offset to Zero

[John Stengrevics]

Hi Fred,

Thanks very much for the reply.

I tried the first exercise.  With VFO NOR enabled, the frequency remains 
constant.  With VFO OFS enabled, the frequency decreases by 60 KHz which, I 
guess, is my CW pitch.

When I am operating, and i switch from SSB to CW, I have to retune which I find 
very inconvenient.  You can lose a weak station while trying to retune. 

So, if I understand correctly, I should enable VFO OFS so I don’t have to 
retune?  Or, should I set my CW tone to zero?  I’m still a bit puzzled.

73,

John
WA1EAZ

> On Apr 21, 2017, at 12:54 PM, Cady, Fred  wrote:
> 
> Hi John,
> I don't know where you are seeing 50 KHz.  The change in VFO when changing 
> from CW to SSB should be what you have set in you CW tone.
> 
> Try these two exercises.
> Exercise
> Examine what happens when switching between CW and SSB with CW WGHT VFO set 
> to NOR and when set to OFS.
> Select CW mode and tune VFO A to some even CW frequency, such as 14.050.000.
> Enter the CW WGHT menu and tap the key to select VFO NOR.
> Exit the menu and switch between SSB and CW modes.  With VFO NOR, VFO A 
> remains constant. 
> Change to VFO OFS and repeat the experiment.With VFO OFS activated, the 
> display shows 14.050.000 minus your CW pitch
> 
> Exercise
> What happens if two stations are using SSB and decide to switch to CW with CW 
> WGHT VFO OFS NOR and activated.
> With VFO OFS NOR, each station will have to re-tune the other to hear the CW 
> tone.  With VFO OFS activated, neither station will have to re-tune.  Each 
> station’s VFO will be automatically offset by the pitch amount.
> 
> If you sometimes operate mixed mode, with you switching to CW and the other 
> station on SSB, it is best to enable VFO OFS so the other station doesn't 
> have to retune you when you switch from SSB to CW.
> 
> 73,
> Fred KE7X
> 
> From: Elecraft  > on behalf of stengrevics 
> >
> Sent: Friday, April 21, 2017 8:52 AM
> To: elecraft@mailman.qth.net 
> Subject: [Elecraft] Problem Setting CW Offset to Zero
>  
> Reading KE7X's manual, I should be able to set the offset to zero by
> selecting CW WGHT from the CONFIG menu and then tapping the 5 button to
> select VFO nor.  But, this procedure leaves the offset at around 50 KHz.  Am
> I interpreting Fred's instructions incorrectly?
> 
> Thanks,
> 
> John
> WA1EAZ
> 
> 
> 
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>  
> 
> Sent from the Elecraft mailing list archive at Nabble.com 
> .
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[Elecraft] Matching range of KPA1500 Built-in Tuner

[Phil Hystad]

I must have missed something to generate the exchanges on internal and external 
tuners and antennas with more than 3:1 SWR.

I am guessing that the matching range at 1500 watts for the KPA1500 tuner is 
limited?  Is it similar the KAT500 which is limited to 3:1 at 1000 watts?  Has 
the SWR matching range at various power levels of the KPA1500 been published 
somewhere?

73, phil, K7PEH

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Re: [Elecraft] K2 Rev A to Rev B Upgrade

[Don Wilhelm]

Ralph,

Yes, the A to B mods are worthwhile.  I have done many of them.
Download the K2 A to B instructions and look at the first page to see 
the entire list of associated upgrades.


The only 2 mods that are not listed there are the K2 Keying Waveshape 
Mod and the Extremely High Signal Handling mod (2 back to back 1N4148 
diodes at the input of the IF Amp).  The K2 Keying Waveshape Mod kit was 
withdrawn because the PIN diode is no longer available in thru-hole 
format, but Elecraft has a substitute that is used in new K2s.  I can 
send you the instructions - if you want the instructions, send me a 
private email.


With that serial number, you will find added benefit if you change the 
IF crystals on both the RF Board and the KSB2 option.  While you have 
the crystals off the KSB2, it is an easy matter to change the filter 
capacitors to widen the OP1 filter to 2.4kHz from the older 2.1kHz 
bandwidth.


While you are at it, change the AG Gain pot and install the Alternate AF 
Gain Wiring mod.


I am not certain how long it would take someone to do all the mods doing 
it for the first time.  It takes me less than a day, plus a couple hours 
to do the alignment and test, but then I have had a lot of practice.


73,
Don W3FPR

On 4/21/2017 10:59 AM, Ralph Perreca wrote:

Hi All
I purchased my Elecraft K2 several months ago Ser # 1913 firmware 1.06F 1.02 
with ATU And SSB options I am considering doing the Rev A to Rev B upgrade and 
would like some feedback as to whether it is worth doing and why as well as 
approx build time for a builder with average experience I have built several 
small kits and the Elecraft K1

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Re: [Elecraft] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply

[Clay Autery]

Wayne, Eric, and everyone else who had/has a hand in making this happen:

Well done!  Simply superb effort to overcome multiple and significant
obstacles on many fronts.

Please, do place me on the list of folks keenly interested in knowing
when one might place an order/pre-order.  :-)

Out-friggin'-standing!!

73,

__
Clay Autery, KY5G

On 4/20/2017 11:01 PM, Wayne Burdick wrote:
> We’re pleased to announce our KPA1500 solid-state amplifier, covering 160 to 
> 6 meters. Max power output is 1500 Watts. Other important features include:
>
>   - Small RF deck fits on nearly any desktop (~4.5 x 13 x 11.5”, HWD); weighs 
> only ~22 pounds
>   - Separate lightweight switching power supply weighs ~15 pounds (standard 
> cable is 6 feet long)
>   - Styling matches our other K-Line products
>   - Built-in wide-range antenna tuner (ATU) with instant recall of 
> per-band/per-segment settings
>   - Dual antenna jacks
>   - Rich I/O complement including Ethernet
>   - Interfaces to nearly any transceiver; fully integrated with K3 and K3S
>   - Extensive parametric monitoring ensures safe operation
>   - Silent PIN-diode T/R switching (no QSK relays)
>
> Introductory price: $5995.
>
> For photos and additional information, use the links below:
>
>http://www.elecraft.com/KPA1500/KPA1500%20FAQ%20rev%20A1b.pdf
>
>
> If you’d like to be notified when we begin taking orders, please contact 
> Elecraft. Or add your name to the list at the Visalia DX convention this 
> weekend. 
>
> Required notification: "This device has not yet been authorized as required 
> by FCC rules. It is not, and may not be
> offered for sale, or lease, or sold or leased, until authorization is 
> obtained."
>
> 73,
> Wayne, N6KR
> Eric, WA6HHQ

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Re: [Elecraft] [Elecraft_K3] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply

[Clay Autery]

Excellent point  I look forward to deploying more/better copper!  :-)

__
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On 4/21/2017 11:32 AM, Alan Bloom wrote:
> With 1500W of power, if the SWR is greater than 3:1 you may be
> exceeding the ratings of the feedline.  For example, Belden 9914 is
> rated at a maximum of 300 VRMS, which is 1800W with a 50-ohm feedline
> or only 600W with a 3:1 SWR.  At 30 MHz, RG-8/213 style coax is
> typically rated at 1500W with a 1:1 SWR.
>
> It's true that you can do more than that with low-duty-factor modes
> like CW and SSB, but if you are running much more than 3:1 SWR you may
> be in danger of damaging the feedline.
>
> Alan N1AL
>
>

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Re: [Elecraft] [Elecraft_K3] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply

[Bill Breeden]

An excellent point missed by many of the desktop tuner and high feedline 
SWR advocates who insist on using coax fed antennas. Typically, they 
blame their failures on cheap coax.


73,

Bill - NA5DX


On 4/21/2017 11:32 AM, Alan Bloom wrote:
With 1500W of power, if the SWR is greater than 3:1 you may be 
exceeding the ratings of the feedline.  For example, Belden 9914 is 
rated at a maximum of 300 VRMS, which is 1800W with a 50-ohm feedline 
or only 600W with a 3:1 SWR.  At 30 MHz, RG-8/213 style coax is 
typically rated at 1500W with a 1:1 SWR.


It's true that you can do more than that with low-duty-factor modes 
like CW and SSB, but if you are running much more than 3:1 SWR you may 
be in danger of damaging the feedline.


Alan N1AL


On 04/21/2017 06:28 AM, Jim Miller wrote:

Wes

Can you describe your affected antennas?

73

Jim ab3cv

On Apr 21, 2017, at 8:56 AM, Wes Stewart 
wrote:

A couple of points.

If you believe that an SWR of >3 necessarily degrades the efficiency
of an antenna, you are simply wrong.

If the "tuner" components have to be derated to this extent then
perhaps it should be called a line flattener rather than a tuner
because a lot of guys are still going to need a tuner.




On 4/21/2017 4:34 AM, j...@kk9a.com wrote: The KPA1500 tuner range
is fine. If your antennas have >3:1 SWR you need to do some work
outside. It will help your signal much more than the amp. Even when
I operated the RTTY Roundup in January after an ice storm my
antennas were within this amplifiers SWR range.

John KK9A


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Re: [Elecraft] [Elecraft_K3] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply

[Clay Autery]

Ease up for a minute  Look at it my way.  I KNOW I am gonna need an
external tuner with massive capability to do the same thing I am doing
now  only one tuner on the commercial market will tune my 80m loop
at 1500W the way the K3s can.

I didn't WANT an onboard tuner...  I consider the price point fair for
an amp only.  It would cost me roughly that much to build one from a
true kit, boards, or schematic...  (Looking forward to it).

Tuning full range, full-power, from 160-6m, from more than 3:1 gets
expensive, big, and heavy in a hurry

MOST folks don't need/want a tuner like that, especially if it takes
more money out their pocket.

Consider the on-board tuner a bonus extra...  and if so inclined send up
a prayer the FCC approval is rapidly forthcoming.  :-)

73,

__
Clay Autery, KY5G

On 4/21/2017 7:56 AM, Wes Stewart wrote:
> A couple of points.
>
> If you believe that an SWR of >3 necessarily degrades the efficiency
> of an antenna, you are simply wrong.
>
> If the "tuner" components have to be derated to this extent then
> perhaps it should be called a line flattener rather than a tuner
> because a lot of guys are still going to need a tuner.
>
>
>
> On 4/21/2017 4:34 AM, j...@kk9a.com wrote:
>> The KPA1500 tuner range is fine. If your antennas have >3:1 SWR you need
>> to do some work outside. It will help your signal much more than the
>> amp.
>> Even when I operated the RTTY Roundup in January after an ice storm my
>> antennas were within this amplifiers SWR range.
>>
>> John KK9A
>>
>> from: Wes Stewartn7ws
>> Fri Apr 21 01:18:59 EDT 2017
>> ]
>> Not enough full power tuner range.
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Re: [Elecraft] KPA-1500: Gain Mod when FCC Lifts 15db Rule

[David Woolley]

As I understand the way things work, they will not get approval for the 
device, if it is easily modifiable to defeat the current limit, so I 
would expect them to play down any modifiability even if it can't be 
classed as easy.


--
David Woolley K2 06123

On 21/04/17 11:43, Richard Thorne wrote:

So if and when the FCC lifts the 15db gain rule, will there be a mod
available to increase the gain capability so a KX3 or KX2 could drive
this bad boy?



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Re: [Elecraft] [Elecraft_K3] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply

[Wes Stewart]

I'm not necessarily defining a personal situation.  But almost any 80 or 160 
antenna will suffice as an example.


I am currently constructing a vertical for those bands.  The model shows 2:1 on 
160 at resonance and >3:1 just 60 KHz away and this is with considerable ground 
loss.  Less loss would equal lower BW.  With quarter wave resonance on 80 at 3.6 
MHz it exceeds 3:1 at 3.8 MHz and is nearly 7:1 at 4.0.


Transmission line loss is a non-issue with 7/8" Heliax.

On 4/21/2017 6:28 AM, Jim Miller wrote:

Wes

Can you describe your affected antennas?

73

Jim ab3cv

On Apr 21, 2017, at 8:56 AM, Wes Stewart  wrote:

A couple of points.

If you believe that an SWR of >3 necessarily degrades the efficiency of an 
antenna, you are simply wrong.

If the "tuner" components have to be derated to this extent then perhaps it 
should be called a line flattener rather than a tuner because a lot of guys are still 
going to need a tuner.




On 4/21/2017 4:34 AM, j...@kk9a.com wrote:
The KPA1500 tuner range is fine. If your antennas have >3:1 SWR you need
to do some work outside. It will help your signal much more than the amp.
Even when I operated the RTTY Roundup in January after an ice storm my
antennas were within this amplifiers SWR range.

John KK9A

from: Wes Stewartn7ws
Fri Apr 21 01:18:59 EDT 2017
]
Not enough full power tuner range.



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Re: [Elecraft] KPA 500 vs New 1500 watt amp

[rich hurd WC3T]

Intro price he said is $5995.

On Fri, Apr 21, 2017 at 12:56 PM, Fred Smith 
wrote:

> Wayne I'm a bit late on this thread but will the cost be in the $5-6K
> range?
>
>
> 73,
> Fred/N0AZZ
> K3 Ser # 6730--KX3 # 5210--K2/100 # 6470-KAT100
> P3/SVGA--KAT500--W2
> Amps Elecraft KPA500 HF/6m--Alpha's 9500 HF--87A HF--Mirage B-5030-G
> 300+w--(2) B-5016-G's 165w 2m
>
>
>
> -Original Message-
> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
> Wayne Burdick
> Sent: Friday, April 21, 2017 11:31 AM
> To: Roy Koeppe
> Cc: Elecraft Reflector
> Subject: Re: [Elecraft] KPA 500 vs New 1500 watt amp
>
> Our philosophy at Elecraft is to cover both ends of the spectrum.
> Figuratively speaking.
>
> When the bands are open, the birds are singing, and the sun is shining,
> you’ll find us outdoors using a hand-held KX2 at 10 watts with a whip. But
> late at night, when propagation is in the tank and that rare DX station
> peeks over the horizon for a once-in-a-lifetime fleeting moment, seconds
> count and size really does matter. At these times, we flip the big switch.
>
> Wayne
> N6KR
>
>
>
> > On Apr 21, 2017, at 9:02 AM, Roy Koeppe  wrote:
> >
> >
> > Aboot:
> >
> > "And the reason you "need" the extra 1000 W is that the others in the
> > pileup are all running max power.  A typical arms race, with tempers
> > to match."
> >
> >
> > Apparently none of you here ragchews on 80M CW roundtables at sunrise
> times during spring/summer thunderstorms seasons across the country! That's
> the reason QRO was born...
> >
> > 73,  Roy   K6XK Iowa
> >
> > __
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> > n...@elecraft.com
>
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-- 
73 (or 72 for the QRP folks),
Rich Hurd / WC3T
Northampton County RACES
EPA-ARRL Public Information Officer for Scouting
Latitude: 40.761621 Longitude: -75.288988  Grid: *FN20is*
40°45.68' N 75°17.33' W
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Re: [Elecraft] K2 Rev A to Rev B Upgrade

[Guy Olinger K2AV]

Revision B fixed a lot of things.

With your experience, I would do the A:B upgrades and all the other
mods. I'm not sure the DSP board is available any more from Elecraft,
DSP's CPU part not made any more is what I'm remembering.

I did them one at a time, spread out. Not a one or two night project.

The result of all the mods + DSP was impressive. It heard better on
the low bands than my FT1000MP.

73, Guy K2AV

On Fri, Apr 21, 2017 at 10:59 AM, Ralph Perreca  wrote:
> Hi All
> I purchased my Elecraft K2 several months ago Ser # 1913 firmware 1.06F 1.02 
> with ATU And SSB options I am considering doing the Rev A to Rev B upgrade 
> and would like some feedback as to whether it is worth doing and why as well 
> as approx build time for a builder with average experience I have built 
> several small kits and the Elecraft K1
> Thank you
> Ralph
> KD2EJR
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Re: [Elecraft] Elecraft insurance rate?

[Clay Autery]

Mike,

You get an "as calculated" price from separate software would be my
guess.  So that they can pass on their cost to you to keep your price as
low and fair as possible.

You're new here I suspect, so I understand the cynicism  but it it
definitely not warranted under these circumstances.

Welcome to the reflector!

73,

__
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On 4/21/2017 6:09 AM, Mike Parkes wrote:
> Hello group,
> I am considering ordering some equipment from Elecraft that totals around
> $2700 or so. I just noticed on the cart check out that an "insurance
> charge" will come AFTER you submit the order? Weird. Anyone have any clue
> what the rate is? I don't mind paying a premium for made-in-USA products,
> what I don't like are surprises and obscure policies. Why can't they just
> state the rate (per X$) up front? Or do they have to consult the oracle to
> find out what the insurance rate is?
> Mike Parkes AB7RU
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Re: [Elecraft] KPA 500 vs New 1500 watt amp

[Wayne Burdick]

Hi Fred,

$5995, complete with internal ATU and external, lightweight switching power 
supply. See:

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

I might point out that only Elecraft offers a legal-limit amp with a 
palindromic price tag :)

73,
Wayne
N6KR


> On Apr 21, 2017, at 9:56 AM, Fred Smith  wrote:
> 
> Wayne I'm a bit late on this thread but will the cost be in the $5-6K range?
> 
> 
> 73,
> Fred/N0AZZ
> K3 Ser # 6730--KX3 # 5210--K2/100 # 6470-KAT100
> P3/SVGA--KAT500--W2
> Amps Elecraft KPA500 HF/6m--Alpha's 9500 HF--87A HF--Mirage B-5030-G 
> 300+w--(2) B-5016-G's 165w 2m
> 
> 
> 
> -Original Message-
> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wayne 
> Burdick
> Sent: Friday, April 21, 2017 11:31 AM
> To: Roy Koeppe
> Cc: Elecraft Reflector
> Subject: Re: [Elecraft] KPA 500 vs New 1500 watt amp
> 
> Our philosophy at Elecraft is to cover both ends of the spectrum. 
> Figuratively speaking.
> 
> When the bands are open, the birds are singing, and the sun is shining, 
> you’ll find us outdoors using a hand-held KX2 at 10 watts with a whip. But 
> late at night, when propagation is in the tank and that rare DX station peeks 
> over the horizon for a once-in-a-lifetime fleeting moment, seconds count and 
> size really does matter. At these times, we flip the big switch.
> 
> Wayne
> N6KR
> 
> 
> 
>> On Apr 21, 2017, at 9:02 AM, Roy Koeppe  wrote:
>> 
>> 
>> Aboot:
>> 
>> "And the reason you "need" the extra 1000 W is that the others in the 
>> pileup are all running max power.  A typical arms race, with tempers 
>> to match."
>> 
>> 
>> Apparently none of you here ragchews on 80M CW roundtables at sunrise times 
>> during spring/summer thunderstorms seasons across the country! That's the 
>> reason QRO was born...
>> 
>> 73,  Roy   K6XK Iowa 
>> 
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> 
> 

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Re: [Elecraft] KPA-1500: Gain Mod when FCC Lifts 15db Rule

[Clay Autery]

Excellent question.

Do not expect an authoritative answer until AFTER the ink is dry on the
gain limited approval from the FCC.  ;-)

__
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MONTAC Enterprises
(318) 518-1389

On 4/21/2017 5:43 AM, Richard Thorne wrote:
> So if and when the FCC lifts the 15db gain rule, will there be a mod
> available to increase the gain capability so a KX3 or KX2 could drive
> this bad boy?
>
> Rich - N5ZC

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