[Elecraft] KPA1500
Bill Johnson
k9yeq at live.com
Fri Apr 21 18:11:02 EDT 2017
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-bounces at mailman.qth.net] On Behalf Of Hunter Ellington
Sent: Friday, April 21, 2017 1:52 PM
To: elecraft at 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
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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 (john at 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 (john at 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 (thelastdb at 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-bounces at mailman.qth.net] On Behalf Of Wayne Burdick
Sent: Friday, April 21, 2017 12:31 AM
To: Elecraft Reflector
Cc: elecraft_k3 at yahoogroups.com; elecraft at 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_k3 at yahoogroups.com, elecraft at 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 at mailman.qth.net
Subject: Re: [Elecraft] [Elecraft_K3] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply
Message-ID:
Content-Type: text/plain; charset=utf-8; format=flowed
Not enough full power tuner range.
------------------------------
Message: 4
Date: Thu, 20 Apr 2017 22:24:41 -0700
From: Eric Swartz
To: "James F. Boehner MD"
Cc: Wayne Burdick , Elecraft Reflector
, elecraft_k3 at yahoogroups.com,
elecraft at yahoogroups.com
Subject: Re: [Elecraft] Additional KPA1500 amplifier information
Message-ID:
Content-Type: text/plain; charset=UTF-8
Yes. 2 devices.
Eric
*elecraft.com *
On Thu, Apr 20, 2017 at 10:11 PM, James F. Boehner MD via Elecraft < elecraft at mailman.qth.net> wrote:
> LDMOS technology?
>
>
> '73 de JIM N2ZZ
>
> -----Original Message-----
> From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf
Of
> Wayne
> Burdick
> Sent: Friday, April 21, 2017 12:31 AM
> To: Elecraft Reflector
> Cc: elecraft_k3 at yahoogroups.com; elecraft at 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
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net Please help support this email
> list: http://www.qsl.net/donate.html Message delivered to
> jboehner01 at yahoo.com
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net Please help support this email
> list: http://www.qsl.net/donate.html Message delivered to
> eric.swartz at elecraft.com
>
------------------------------
Message: 5
Date: Thu, 20 Apr 2017 22:32:48 -0700
From: "Eric Swartz - WA6HHQ, Elecraft"
To: Richard Fjeld , "elecraft at mailman.qth.net"
Subject: Re: [Elecraft] Ground rod through concrete thread?
Message-ID:
Content-Type: text/plain; charset=utf-8; format=flowed
Folks - Let's officially close this thread. We have overloaded the list on this topic and need to give everyone a reprieve :-)
73m
Eric
/You tired list moderator heading to Visalia to get more tired tomorrow/ ;-) /elecraft.com/
On 4/20/2017 9:24 PM, Richard Fjeld wrote:
> I have always thought the best way to avoid a lightning strike is to
bleed off any build up of energy that may be on the antenna.
>
> Many have seen this video of the two guys climbing a 1768 foot TV
antenna tower. It clearly shows devices to dissipate energy.
> There is one right at the very top when they get there, but not
fully shown as the others are.
>
> There is a short animation in the beginning. This is not for weak
hearts. https://www.youtube.com/watch?v=7k4Xk1mEwmI
> As you watch this, think about climbing back down.
>
> Dick, n0ce
>
>
> On 4/20/2017 2:13 PM, Terry Schieler wrote:
>
> POOF! Hey what happened to the ground rod through concrete thread?
;o)
>
> Terry, W0FM
>
>
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net Please help support this email
> list: http://www.qsl.net/donate.html Message delivered to
> eric.swartz at elecraft.com
------------------------------
Message: 6
Date: Fri, 21 Apr 2017 00:55:56 -0700 (MST)
From: "Petr, OK1RP/M0SIS"
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] [K3] WTB: KAT500
Message-ID:
Content-Type: text/plain; charset=us-ascii
Hi,
still no luck.
If someone know about dusty piece then I will be happy.
Best 73 - Petr, OK1RP
-----
http://ok1rp.blogspot.com
--
View this message in context:
http://elecraft.365791.n2.nabble.com/K3-WTB-KAT500-tp7628974p7629672.html
Sent from the Elecraft mailing list archive at Nabble.com.
------------------------------
Message: 7
Date: Fri, 21 Apr 2017 08:46:10 +0000
From: Ken K6MR
To: "Elecraft_K3 at yahoogroups.com" ,
"elecraft at mailman.qth.net"
Subject: Re: [Elecraft] [Elecraft_K3] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply
Message-ID:
Content-Type: text/plain; charset="Windows-1252"
The Anan SDR folks are doing this using an external coupler feeding one of the receivers in the Anan. Google ?Pure Signal?, which is their name for the implementation. I think it?s a VK who is doing the firmware. There are a few YouTube videos showing the end result, and it is really impressive. The basic concept is pretty simple, but as always the devil is in the details. Way above my pay grade :^)
Ken K6MR
From: 'Stephen Bloom' sbloom at acsalaska.net [Elecraft_K3]
Sent: Thursday, April 20, 2017 11:20 PM
To: Elecraft_K3 at yahoogroups.com
Subject: RE: [Elecraft_K3] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply
Ken:
How would one implement this. I know that the real weak spot amongst the high power solid state amps available to the Amateur community has been high IMD, due to what I understand are limits to the existing DMOS chips.
Thanks/73
Steve KL7SB
From: Elecraft_K3 at yahoogroups.com [mailto:Elecraft_K3 at yahoogroups.com]
Sent: Thursday, April 20, 2017 8:48 PM
To: Elecraft_K3 at yahoogroups.com
Subject: RE: [Elecraft_K3] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply The Elecraft folks should be in charge of government secrets? nothing would ever leak :^)
One interesting item in the rear panel photo: Tx Sample. Output for ?Pure Signal? style IMD improvement using pre-distortion in an SDR radio?
Ken K6MR
.
__,_._,___
------------------------------
Message: 8
Date: Fri, 21 Apr 2017 05:43:47 -0500
From: Richard Thorne
To: Elecraft Reflector
Subject: [Elecraft] KPA-1500: Gain Mod when FCC Lifts 15db Rule
Message-ID:
Content-Type: text/plain; charset=utf-8; format=flowed
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
------------------------------
Message: 9
Date: Fri, 21 Apr 2017 06:58:19 -0400
From: "john at kk9a.com"
To: elecraft at mailman.qth.net
Subject: [Elecraft] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply
Message-ID:
Content-Type: text/plain;charset=utf-8
Nice! When you asked what we would want in a high power amp, this matched my wish list perfectly. Great job Wayne!
John KK9A
From: Wayne Burdick n6kr
Fri Apr 21 00:01:29 EDT 2017
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
------------------------------
Message: 10
Date: Fri, 21 Apr 2017 04:09:52 -0700
From: Mike Parkes
To: elecraft at mailman.qth.net
Subject: [Elecraft] Elecraft insurance rate?
Message-ID:
Content-Type: text/plain; charset=UTF-8
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
------------------------------
Message: 11
Date: Fri, 21 Apr 2017 07:29:56 -0400
From: Fred Moore
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] KX3 tuner getting stuck at 25.4:1 SWR
Message-ID:
Content-Type: text/plain; charset=utf-8
Sorry for the late response.. I had the exact problem several weeks ago. Every time I removed the batteries the problem would be resolved.. The problem was ultimately me being a dumb ass.. I had purchased a nice blue tooth speaker that perfectly sat on top of the KX3, however it kept sliding off. My solution was to glue a small round magnet on the front corners on the KX3 top. I also glued the same small magnet on the bottom of the radio. Well guess what, I knew better but didn't even think about magnetic shielding of the inductors in the ATU.
While testing everything was fine, when I was convinced everything was ok I would place the radio back in it's operating position everything was still ok even with speaker on top, as long as I was on 20 meters, as soon as I went to 40 which could be a couple of days later.. the radio again went to 25.4:1
One magnet was not enough to do it, but when both magnets were on the top right hand corner, it was all over for the ATU.. makes 100% sense
now that I know what was happening... Regards.. Fred
Fred Moore
email: fred at fmeco.com
fred at safes.com
phone: 321-217-8699
On 4/19/17 11:55 PM, nate t wrote:
> Hi all,
>
> I opened up the KX3 and pulled the ATU, everything seemed to be in
order and the LPF was in the correct position.
>
> I put the original batteries back in to keep the testing the same as
previously. They were a bit lower than I had previously thought, read 9V (alkaline). I put up a 20m dipole and tested it, 20m tuned up right away and I let it run for a bit. I then switched down to 40m and it tuned up right away to a 1.0:1. After switching back and forth between
40/30/20 a few times, I noticed that the relays seemed to be switching a bit slower than normal, and that the tuning power was going down to 2.0W instead of the normal 3.0W.
>
> Went to 40m again, and it started landing on the 25.4:1 SWR every
try. Pulled up the battery monitor on the display, and while it was running the tuning process, the voltage was dropping down to 7.9V, and it'd stick at 25.4:1. Switched over to external power and it would properly tune 40m again on the 20m dipole without issue.
>
> The dummy load I ordered arrived today as well, and using new
batteries, it will tune 1:0.1 on all bands.
>
> I'm going to chalk this up to being a low voltage situation, and
hopefully it doesn't return!
>
> I appreciate everyone's suggestions.
>
> 73
>
>
>> On Apr 17, 2017, at 11:35 AM, Walter Underwood wrote:
>>
>> 25.4:1 SWR is what the KX3 reads for a short or an open, if I
remember correctly.
>>
>> Agreed, open it up, make sure everything is tight, include the
ribbon cable.
>>
>> wunder
>> K6WRU
>> Walter Underwood
>> CM87wj
>> http://observer.wunderwood.org/ (my blog)
>>
>>> On Apr 17, 2017, at 11:20 AM, Don Wilhelm wrote:
>>>
>>> Nate,
>>>
>>> Since the problem is intermittent, I would not suspect a problem
with an active component.
>>>
>>> You might want to remove the bottom cover and check to be certain
the hardware on the BNC jack is tight and the LPF on the BNC connector is properly positioned. You may have to lift the KXAT3 to check - see Figure 43 of the KX3 Kit Assembly Manual.
>>>
>>> 73,
>>> Don W3FPR
>>>
>>> On 4/16/2017 4:55 AM, nate t wrote:
>>>> Hi,
>>>> I was working with my KX3 earlier today, RX only, using an
endfed, while running on batteries, RXing WSPR and PSK31.
>>>> After running for a bit, the ATU seemed to stop working.
Attempting to retune on 40m, it would stick at a 25.4:1 SWR.
>>>> Tried switching down to 20m and it retuned right away to a 1.3:1.
Applying external power to the unit, I tried tuning again on 40m (battery was reporting 10V if I recall correctly); It then tuned the end fed up, but only to a 1.7, which it will typically match to a 1.0:1, it would also get stuck at the 25.4:1 SWR on some of the attempted tunes.
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Elecraft at mailman.qth.net
>>>
>>> This list hosted by: http://www.qsl.net Please help support this
>>> email list:
http://www.qsl.net/donate.html
>>> Message delivered to wunder at wunderwood.org
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net Please help support this
>> email list: http://www.qsl.net/donate.html Message delivered to
>> n8bsd0 at gmail.com
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net Please help support this email
> list: http://www.qsl.net/donate.html Message delivered to
> fred at fmeco.com
>
------------------------------
Message: 12
Date: Fri, 21 Apr 2017 07:34:13 -0400
From: "john at kk9a.com"
To: elecraft at mailman.qth.net
Subject: [Elecraft] [Elecraft_K3] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply
Message-ID:
Content-Type: text/plain;charset=utf-8
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.
------------------------------
Message: 13
Date: Fri, 21 Apr 2017 08:13:39 -0400
From: Don Wilhelm
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] KX3 tuner getting stuck at 25.4:1 SWR
Message-ID:
Content-Type: text/plain; charset=utf-8; format=flowed
All,
Magnetic Fields in close proximity to the relays in the KX3 will interfere with the relay operation. The aluminum enclosure of the KX3
(KX2 etc.) will not stop a magnetic field.
This was a problem with the speaker magnet in some KPA100s because the
speaker was positioned right above the K2 VFO selection relays, before
the speaker shield was made standard.
73,
Don W3FPR
On 4/21/2017 7:29 AM, Fred Moore wrote:
> Sorry for the late response.. I had the exact problem several weeks
> ago. Every time I removed the batteries the problem would be
> resolved.. The problem was ultimately me being a dumb ass.. I had
> purchased a nice blue tooth speaker that perfectly sat on top of the
> KX3, however it kept sliding off. My solution was to glue a small
round
> magnet on the front corners on the KX3 top. I also glued the same
small
> magnet on the bottom of the radio. Well guess what, I knew better
but
> didn't even think about magnetic shielding of the inductors in the
ATU.
> While testing everything was fine, when I was convinced everything
was
> ok I would place the radio back in it's operating position
everything
> was still ok even with speaker on top, as long as I was on 20
meters, as
> soon as I went to 40 which could be a couple of days later.. the
radio
> again went to 25.4:1
>
> One magnet was not enough to do it, but when both magnets were on
the
> top right hand corner, it was all over for the ATU.. makes 100%
sense
> now that I know what was happening... Regards.. Fred
>
> Fred Moore
> email: fred at fmeco.com
> fred at safes.com
> phone: 321-217-8699
>
> On 4/19/17 11:55 PM, nate t wrote:
>> Hi all,
>>
>> I opened up the KX3 and pulled the ATU, everything seemed to be in
order and the LPF was in the correct position.
>>
>> I put the original batteries back in to keep the testing the same
as previously. They were a bit lower than I had previously thought, read 9V (alkaline). I put up a 20m dipole and tested it, 20m tuned up right away and I let it run for a bit. I then switched down to 40m and it tuned up right away to a 1.0:1. After switching back and forth between 40/30/20 a few times, I noticed that the relays seemed to be switching a bit slower than normal, and that the tuning power was going down to 2.0W instead of the normal 3.0W.
>>
>> Went to 40m again, and it started landing on the 25.4:1 SWR every
try. Pulled up the battery monitor on the display, and while it was running the tuning process, the voltage was dropping down to 7.9V, and it'd stick at 25.4:1. Switched over to external power and it would properly tune 40m again on the 20m dipole without issue.
>>
>> The dummy load I ordered arrived today as well, and using new
batteries, it will tune 1:0.1 on all bands.
>>
>> I'm going to chalk this up to being a low voltage situation, and
hopefully it doesn't return!
>>
>> I appreciate everyone's suggestions.
>>
>> 73
>>
>>
>>> On Apr 17, 2017, at 11:35 AM, Walter Underwood wrote:
>>>
>>> 25.4:1 SWR is what the KX3 reads for a short or an open, if I
remember correctly.
>>>
>>> Agreed, open it up, make sure everything is tight, include the
ribbon cable.
>>>
>>> wunder
>>> K6WRU
>>> Walter Underwood
>>> CM87wj
>>> http://observer.wunderwood.org/ (my blog)
>>>
>>>> On Apr 17, 2017, at 11:20 AM, Don Wilhelm wrote:
>>>>
>>>> Nate,
>>>>
>>>> Since the problem is intermittent, I would not suspect a problem
with an active component.
>>>>
>>>> You might want to remove the bottom cover and check to be certain
the hardware on the BNC jack is tight and the LPF on the BNC connector is properly positioned. You may have to lift the KXAT3 to check - see Figure 43 of the KX3 Kit Assembly Manual.
>>>>
>>>> 73,
>>>> Don W3FPR
>>>>
>>>> On 4/16/2017 4:55 AM, nate t wrote:
>>>>> Hi,
>>>>> I was working with my KX3 earlier today, RX only, using an
endfed, while running on batteries, RXing WSPR and PSK31.
>>>>> After running for a bit, the ATU seemed to stop working.
Attempting to retune on 40m, it would stick at a 25.4:1 SWR.
>>>>> Tried switching down to 20m and it retuned right away to a
1.3:1. Applying external power to the unit, I tried tuning again on 40m (battery was reporting 10V if I recall correctly); It then tuned the end fed up, but only to a 1.7, which it will typically match to a 1.0:1, it would also get stuck at the 25.4:1 SWR on some of the attempted tunes.
>>>> ______________________________________________________________
>>>> Elecraft mailing list
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>
>
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------------------------------
Message: 14
Date: Fri, 21 Apr 2017 08:17:19 -0400
From: charlie carroll
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Additional KPA1500 amplifier information
Message-ID:
Content-Type: text/plain; charset=windows-1252; format=flowed
What about duty cycle? Has a prototype been put through the paces of a real 48 hour contest?
On 4/21/2017 12:30 AM, Wayne Burdick wrote:
> 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
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
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>
------------------------------
Message: 15
Date: Fri, 21 Apr 2017 06:37:17 -0600
From: "Greg"
To:
Subject: [Elecraft] KPA1500
Message-ID:
Content-Type: text/plain; charset="us-ascii"
Eric/Wayne...thank you, thank you, thank you!!!! Please put my name
on the
list. 73, Greg-N4CC
------------------------------
Message: 16
Date: Fri, 21 Apr 2017 06:50:01 -0600
From:
To: Greg , "elecraft at mailman.qth.net"
Subject: Re: [Elecraft] KPA1500
Message-ID:
Content-Type: text/plain; charset="utf-8"
Well at least they have one out of 2 new products introduced. Next up, the HF packer amp. Saving that reveal for Dayton.
72
Myron
WV0H
Printed On Recycled Data
From: Greg
Sent: Friday, April 21, 2017 6:38 AM
To: elecraft at mailman.qth.net
Subject: [Elecraft] KPA1500
Eric/Wayne...thank you, thank you, thank you!!!! Please put my name
on the
list. 73, Greg-N4CC
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------------------------------
Message: 17
Date: Fri, 21 Apr 2017 05:56:00 -0700
From: Wes Stewart
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] [Elecraft_K3] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply
Message-ID:
Content-Type: text/plain; charset=utf-8; format=flowed
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, john at 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.
>
------------------------------
Message: 18
Date: Fri, 21 Apr 2017 09:02:19 -0400
From: David Bunte
To: Wes Stewart
Cc: "elecraft at mailman.qth.net"
Subject: Re: [Elecraft] [Elecraft_K3] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply
Message-ID:
Content-Type: text/plain; charset=UTF-8
Wes -
Excellent points. One of the locals has very fine antennas, but really appreciates the fact that his PW-1 can make the SWR look a 'bit'
better. At
my QTH, and TUNER, is absolutely necessary... but that is because I have only one antenna, and it is usable without a tuner on only one band.
The
internal tuners in most rigs can't handle it... the tuner in my K3, or my KAT500, are perfect on most bands. But a 30' vertical is a HUGE challenge for ANY tuner on 160... and many can't handle it on 80.
Dave - K9FN
On Fri, 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, john at 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.
>>
>>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net Please help support this email
> list: http://www.qsl.net/donate.html Message delivered to
> dpbunte at gmail.com
>
------------------------------
Message: 19
Date: Fri, 21 Apr 2017 13:10:27 +0000
From: brian
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] [Elecraft_K3] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply
Message-ID:
Content-Type: text/plain; charset=windows-1252; format=flowed
John,
Don't agree--unless there truly is something wrong with the antenna, connections or feedline.
Does your 80 or 160M antenna cover the entire band with 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.
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net Please help support this email
> list: http://www.qsl.net/donate.html Message delivered to
> alsopb at comcast.net
>
------------------------------
Message: 20
Date: Fri, 21 Apr 2017 09:18:16 -0400
From: Carl Yaffey1
To: Elecraft Reflector
Subject: Re: [Elecraft] Additional KPA1500 amplifier information
Message-ID:
Content-Type: text/plain; charset=us-ascii
Can I assume that the tuner will be operable when the amp is on standby?
Carl Yaffey K8NU
Recording studio.
cyaffeyNO_SPAM at gmail.com
614 268 6353, Columbus OH
http://www.carl-yaffey.com
http://www.grassahol.com
http://www.bluesswing.com
------------------------------
Message: 21
Date: Fri, 21 Apr 2017 09:28:51 -0400
From: Jim Miller
To: Wes Stewart
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] [Elecraft_K3] New from Elecraft: KPA1500 amplifier with built-in ATU, separate power supply
Message-ID:
Content-Type: text/plain; charset=us-ascii
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, john at 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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Please help support this email list: http://www.qsl.net/donate.html Message delivered to jim at jtmiller.com
------------------------------
Message: 22
Date: Fri, 21 Apr 2017 06:46:48 -0700 (MST)
From: "Petr, OK1RP/M0SIS"
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Additional KPA1500 amplifier information
Message-ID:
Content-Type: text/plain; charset=UTF-8
Hi,
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, including up to 10:1 in standby mode...
73 - Petr, OK1RP
-----
http://ok1rp.blogspot.com
--
View this message in context:
http://elecraft.365791.n2.nabble.com/Additional-KPA1500-amplifier-information-tp7629664p7629688.html
Sent from the Elecraft mailing list archive at Nabble.com.
------------------------------
Message: 23
Date: Fri, 21 Apr 2017 07:01:28 -0700
From: "Dave New, N8SBE"
To: "Elecraft Reflector"
Subject: Re: [Elecraft] Additional KPA1500 amplifier information
Message-ID:
Content-Type: text/plain; charset="utf-8"
------------------------------
Message: 24
Date: Fri, 21 Apr 2017 07:10:06 -0700
From: Wayne Burdick
To: "Dr. William J. Schmidt"
Cc: "James F. Boehner MD" , Elecraft Reflector , elecraft_k3 at yahoogroups.com, elecraft at yahoogroups.com
Subject: Re: [Elecraft] Additional KPA1500 amplifier information
Message-ID:
Content-Type: text/plain; charset=utf-8
We use a pair of parts in the same family that are very conservatively rated at 1500 W output.
Wayne
> On Apr 20, 2017, at 11:44 PM, Dr. William J. Schmidt wrote:
>
> Hmmmm. Too bad these were just announced: MRFX1K80H 65V 1800W
PART. I just had contemplated working one of these into a nice Elecraft look-alike complement.
>
>
>
>
> 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: bill at wjschmidt.com
>
------------------------------
Message: 25
Date: Fri, 21 Apr 2017 07:18:23 -0700
From: Wayne Burdick
To: charlie carroll
Cc: Elecraft Reflector
Subject: Re: [Elecraft] Additional KPA1500 amplifier information
Message-ID:
Content-Type: text/plain; charset=utf-8
Hi Charlie,
The KPA1500 has been put through its paces in in long RTTY contests, running at full power.
We may put an upper bound on key-down time, eventually, but so far we haven?t found it :)
73,
Wayne
N6KR
> On Apr 21, 2017, at 5:17 AM, charlie carroll wrote:
>
> What about duty cycle? Has a prototype been put through the paces
of a real 48 hour contest?
>
> On 4/21/2017 12:30 AM, Wayne Burdick wrote:
>> 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
>>
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net Please help support this
>> email list: http://www.qsl.net/donate.html Message delivered to
>> k1xx at k1xx.com
>>
>
> ______________________________________________________________
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>
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> n6kr at elecraft.com
------------------------------
Message: 26
Date: Fri, 21 Apr 2017 07:23:18 -0700
From: Wayne Burdick
To: "Petr, OK1RP/M0SIS"
Cc: Elecraft Reflector
Subject: Re: [Elecraft] Additional KPA1500 amplifier information
Message-ID:
Content-Type: text/plain; charset=utf-8
The ATU in the KPA1500 will handle SWR levels inversely proportional to power output, primarily constrained by reflected power. Eventually the FAQ will spell this out in greater detail.
Suffice to say that we?ll be maximizing flexibility while still ensuring safe operation.
Wayne
N6KR
> On Apr 21, 2017, at 6:46 AM, Petr, OK1RP/M0SIS wrote:
>
> Hi,
> 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,
including up
> to 10:1 in standby mode...
> 73 - Petr, OK1RP
>
>
>
> -----
> http://ok1rp.blogspot.com
> --
> View this message in context:
http://elecraft.365791.n2.nabble.com/Additional-KPA1500-amplifier-information-tp7629664p7629688.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
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> list: http://www.qsl.net/donate.html Message delivered to
> n6kr at elecraft.com
------------------------------
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