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Re: Elecraft Digest, Vol 171, Issue 42

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Gerry Miller

Re: Elecraft Digest, Vol 171, Issue 42

---------- Original Message ----------
From: [hidden email]
To: [hidden email]
Subject: Elecraft Digest, Vol 171, Issue 42
Date: Fri, 20 Jul 2018 12:10:49 -0400

Send Elecraft mailing list submissions to
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To subscribe or unsubscribe via the World Wide Web, visit
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When replying, please edit your Subject line so it is more specific
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Today's Topics:

1. My finished K2 (Mark Petrovic)
2. Re: My finished K2 (Ronald Genovesi)
3. K1, K2 enhancement parts (Doug Hensley)
4. Flattery indeed (Martin Sole)
5. Re: Calibrating the P3 Station Monitor? (Jim Brown)
6. Re: Long wire - portable operation KX3 with tuner (Jim Brown)
7. Re: My finished K2 (lmarion)
8. KX3 and FT8 DX Pedition Mode (Keith Onishi)
9. K3 Band Data Information Needed (Barry Simpson)
10. Re: K3 Band Data Information Needed (Keith Onishi)
11. KPA1500 latest firmware (Roy Koeppe)
12. Re: My finished K2 (Clay Autery)
13. KPA500 strange behavior (W1IE)
14. Re: My finished K2 (Petr, OK1RP/M0SIS)
15. Re: K3 Band Data Information Needed (Clay Autery)
16. Re: KPA1500 latest firmware (Paul Baldock)
17. Re: Elecraft earns yet more respect (ab2tc)
18. KXPA100 fault issue and low power on 80 and 6m (Esquer Dave)
19. Re: Elecraft earns yet more respect (ab2tc)
20. Re: KPA500 strange behavior (Bob McGraw K4TAX)
21. Re: Elecraft earns yet more respect (Rick WA6NHC)
22. Re: KPA500 strange behavior (Jack Brindle)
23. For Sale KRC2 (John Huffman)
24. Re: KPA1500 latest firmware (Roy Koeppe)
25. Re: Elecraft earns yet more respect (Charlie T)
26. Re: KPA1500 latest firmware (AB4IQ)
27. Re: K2 external speaker hole (Mark Petrovic)
28. K2 RF Capacitor ID (AE0MM)

----------------------------------------------------------------------

Message: 1
Date: Thu, 19 Jul 2018 19:28:04 -0700
From: Mark Petrovic <[hidden email]>
To: [hidden email]
Subject: [Elecraft] My finished K2
Message-ID:
<CABMnSbGQP0PSNjfQKrP61OTSX=[hidden email]>
Content-Type: text/plain; charset="UTF-8"

At long last, K2 S/N 7809 is built.

https://photos.app.goo.gl/CjwFL9XagixsYHmZ8

Many thanks for all the positive feedback I got here, the many questions
that were answered, and to Elecraft for an amazing kit. And, of course, to
Don W3FPR for providing unwavering expert guidance when I needed it.

I built a NorCal40A years ago, and more recently a K1 a couple years ago.
I always thought the K2 was too much radio for me, but I'm glad I took the
plunge. With these three rigs, I own pieces of history.

73,
Mark
AE6RT

--
Mark

------------------------------

Message: 2
Date: Thu, 19 Jul 2018 19:50:20 -0700
From: Ronald Genovesi <[hidden email]>
To: Mark Petrovic <[hidden email]>
Cc: [hidden email]
Subject: Re: [Elecraft] My finished K2
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=us-ascii

Congratulations Mark. Looking good. Have you made your first contact yet?

Ron Genovesi
[hidden email]

> On Jul 19, 2018, at 7:28 PM, Mark Petrovic <[hidden email]> wrote:
>
> At long last, K2 S/N 7809 is built.
>
> https://photos.app.goo.gl/CjwFL9XagixsYHmZ8
>
> Many thanks for all the positive feedback I got here, the many questions
> that were answered, and to Elecraft for an amazing kit. And, of course, to
> Don W3FPR for providing unwavering expert guidance when I needed it.
>
> I built a NorCal40A years ago, and more recently a K1 a couple years ago.
> I always thought the K2 was too much radio for me, but I'm glad I took the
> plunge. With these three rigs, I own pieces of history.
>
> 73,
> Mark
> AE6RT
>
> --
> Mark
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

------------------------------

Message: 3
Date: Fri, 20 Jul 2018 02:59:27 +0000
From: Doug Hensley <[hidden email]>
To: Elecraft List <[hidden email]>
Subject: [Elecraft] K1, K2 enhancement parts
Message-ID:
<[hidden email]>

Content-Type: text/plain; charset="iso-8859-1"

I have for sale excess to my needs:

(1) for the K1 and K2 transceivers:

I have two sets of the K6XX CW Indicator with False Blink kit, LED Button Option & header connect/disconnect option. These work well on the K1 and fairly well on the K2. NOTE: the kit requires soldering of SMD components prior to installation of the header. Don Wilhelm installed mine and did a great job. I paid $55. Will sell for $39.95 plus $4 USPS tracked & insured. One kit has a spare LED and will go to the first buyer.

(2) for the K2, the Rework Eliminator kit to ease the task of changing microphone types. These are long out of production and early discussion of the next batch has them higher in price. Sell for $40 plus $4 USPS.

I also have a spare color decal showing the mic positions for the Rework Eliminator. If you have the old black & white or your's is peeling, these are great. $1 plus a USPS first class mail stamp.

You can find ALL of the information about these accessories by using Google.

For the K3 and K3s I still have:

two 2.7 kHZ 5-Pole filters (make an offer)

Either one or both filters are $9.95 shipping which comes with tracking & insurance, 2-3 Day USPS Priority Mail.

Contact me direct please,

Doug W5JV

<< w5jv @ hotmail.com >>

------------------------------

Message: 4
Date: Fri, 20 Jul 2018 11:49:09 +0700
From: Martin Sole <[hidden email]>
To: [hidden email]
Subject: [Elecraft] Flattery indeed
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=utf-8; format=flowed

This was posted to the Ten-Tec reflector though arguably it seems to owe
much to the K2. Kit version or ready built, hmm.

What does it remind you of?

https://swling.com/blog/2018/05/the-mission-rgo-one-a-new-50-watt-all-mode-hf-transceiver/

Martin, HS0ZED

------------------------------

Message: 5
Date: Thu, 19 Jul 2018 22:16:22 -0700
From: Jim Brown <[hidden email]>
To: [hidden email]
Subject: Re: [Elecraft] Calibrating the P3 Station Monitor?
Message-ID:
<[hidden email]>
Content-Type: text/plain; charset=utf-8; format=flowed

On 7/19/2018 3:40 PM, Peter W2IRT wrote:
> I'm good with about a 10% error (on the cautious side), and since I'm a contester, I want to ensure I'm never over about 1425 Watts when I'm competing.

Several years ago, I bought W6OSP's LP100A from his estate. It came with
one sensor, and I bought a second, sending the first back to Larry to
calibrate for me. I have one sensor on the output of both power amps,
and the LP100A autoswitches to display the one that is transmitting.

I'm VERY happy with it. I'm currently using a borrowed KPA1500, and find
that the amp and the LP100A are within a 1-2 percent of each other.

73, Jim K9YC

------------------------------

Message: 6
Date: Thu, 19 Jul 2018 22:17:20 -0700
From: Jim Brown <[hidden email]>
To: [hidden email]
Subject: Re: [Elecraft] Long wire - portable operation KX3 with tuner
Message-ID:
<[hidden email]>
Content-Type: text/plain; charset=utf-8; format=flowed

On 7/19/2018 5:16 PM, Frank Krozel wrote:
> I found 20? and 13? respectively in the manual but thought there was some ?other? reference for 30? and something for the trailing wire. Anyone?

The ARRL Handbook and Antenna Book.

73, Jim K9YC

------------------------------

Message: 7
Date: Fri, 20 Jul 2018 00:10:52 -0600
From: "lmarion" <[hidden email]>
To: "Mark Petrovic" <[hidden email]>, <[hidden email]>
Subject: Re: [Elecraft] My finished K2
Message-ID: <73F919A1AF344B4FA629459C9F622920@LeroyPC>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original

Congratulations!
It is as you say, I feel as if I own ham radio history.
Once Elecraft started they have been my ham radio experience.
Building K2 S/N 40 all options was the peak of my ham radio experience so
far.
I am saying that with the K3S and full 500 watt K-line on the desk.
I probably will not go 1500 watts, 10 acre antenna farm.

73 Leroy AB7CE

-----Original Message-----
From: Mark Petrovic
Sent: Thursday, July 19, 2018 8:28 PM
To: [hidden email]
Subject: [Elecraft] My finished K2

At long last, K2 S/N 7809 is built.

https://photos.app.goo.gl/CjwFL9XagixsYHmZ8

Many thanks for all the positive feedback I got here, the many questions
that were answered, and to Elecraft for an amazing kit. And, of course, to
Don W3FPR for providing unwavering expert guidance when I needed it.

I built a NorCal40A years ago, and more recently a K1 a couple years ago.
I always thought the K2 was too much radio for me, but I'm glad I took the
plunge. With these three rigs, I own pieces of history.

73,
Mark
AE6RT

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

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

------------------------------

Message: 8
Date: Fri, 20 Jul 2018 16:23:00 +0900
From: Keith Onishi <[hidden email]>
To: elecraft <[hidden email]>
Subject: [Elecraft] KX3 and FT8 DX Pedition Mode
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=utf-8

Watching V6J on 17m FT8 DX pedition mode, I found that signal db of Fox?s lowest frequency below 300Hz is very low compared with its second frequency above 300Hz. Here are the example;

070830 -18 0.5 293 ~ JA2VXZ RR73; JA1UXC <V6J> +03
070830 -3 0.5 353 ~ JH3IMR RR73; JR1WYW <V6J> +07

This does not happen with K3. It seems that KX3 filters out below 300Hz.

73 de JH3SIF, Keith

------------------------------

Message: 9
Date: Fri, 20 Jul 2018 17:51:06 +1000
From: Barry Simpson <[hidden email]>
To: Elecraft Mailing List <[hidden email]>
Subject: [Elecraft] K3 Band Data Information Needed
Message-ID:
<[hidden email]>
Content-Type: text/plain; charset="UTF-8"

I want to interface my K3 with a newly acquired SPE 1.5KFA amplifier using
the band data available on the K3 Aux In/Out socket.

Elecraft refer to the data as Bands 1,2,3 and 0 whereas SPE (and other
manufacturers) call them Bands A,B,C and D.

Please can someone let me know if A,B,C,D = 1,2,3,0 or 0,1,2,3 or some
other sequence.

Thanks

Barry Simpson VK2BJ

------------------------------

Message: 10
Date: Fri, 20 Jul 2018 17:22:39 +0900
From: Keith Onishi <[hidden email]>
To: Elecraft Mailing List <[hidden email]>
Subject: Re: [Elecraft] K3 Band Data Information Needed
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=utf-8

K3/K3S Owner?s Manual shows Band Outputs data in page 21. I am referring K3S Owner?s manual A1.

73 de JH3SIF, Keith

> 2018/07/20 16:51?Barry Simpson <[hidden email]>????:
>
> I want to interface my K3 with a newly acquired SPE 1.5KFA amplifier using
> the band data available on the K3 Aux In/Out socket.
>
> Elecraft refer to the data as Bands 1,2,3 and 0 whereas SPE (and other
> manufacturers) call them Bands A,B,C and D.
>
> Please can someone let me know if A,B,C,D = 1,2,3,0 or 0,1,2,3 or some
> other sequence.
>
> Thanks
>
> Barry Simpson VK2BJ
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

------------------------------

Message: 11
Date: Fri, 20 Jul 2018 07:27:51 -0500
From: "Roy Koeppe" <[hidden email]>
To: <[hidden email]>
Subject: [Elecraft] KPA1500 latest firmware
Message-ID: <92E6E3DB6F4A4E21AB54EA52DC5ABE36@ROYKOEPPEHP>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original

Yesterday I updated KPA1500 Utility version and then firmware. That
corrected the occasional random flashing of the SWR LED bar display curse on
my s/n 160. Glad! Now am waiting for the promised ATU upgrade kit to fix the
main display cut out problem which occurs on 10 and 6 meters.

73, Roy K6XK

------------------------------

Message: 12
Date: Fri, 20 Jul 2018 08:57:16 -0500
From: Clay Autery <[hidden email]>
To: [hidden email]
Subject: Re: [Elecraft] My finished K2
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=utf-8; format=flowed

That's wonderful Mark!? I don't "need" a K2, but if I had the extra
lettuce and my K3 were fully outfitted already, I'd buy one just for the
fun of building it.

Enjoy!

73,

______________________
Clay Autery, KY5G
(318) 518-1389

On 19-Jul-18 21:28, Mark Petrovic wrote:

> At long last, K2 S/N 7809 is built.
>
> https://photos.app.goo.gl/CjwFL9XagixsYHmZ8
>
> Many thanks for all the positive feedback I got here, the many questions
> that were answered, and to Elecraft for an amazing kit. And, of course, to
> Don W3FPR for providing unwavering expert guidance when I needed it.
>
> I built a NorCal40A years ago, and more recently a K1 a couple years ago.
> I always thought the K2 was too much radio for me, but I'm glad I took the
> plunge. With these three rigs, I own pieces of history.
>
> 73,
> Mark
> AE6RT
>

------------------------------

Message: 13
Date: Fri, 20 Jul 2018 09:58:51 -0400
From: "W1IE" <[hidden email]>
To: <[hidden email]>
Subject: [Elecraft] KPA500 strange behavior
Message-ID:
<!&!AAAAAAAAAAAYAAAAAAAAAKtOUOGHv6tJldPJpqlhJnPCgAAAEAAAAN2HQPLtkOxOlNVZ/wMh2mgBAAAAAA==@jetbroadband.com>

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

Good morning,

I have an interesting problem in which I hope the group here has an easy
solution.

My KPA 500 is hooked to a TS-2000 outputting 20 watts to the KPA500 and
displays the following abnormalities :

1. At frequencies between 4581 kc to 4601.6 (we are working on MARS
frequencies) using USB and a waveform of M110A, the following
characteristics are observed.
2. The amplifier stops transmitting briefly (less than a blink of an eye)
and then resumes during a M110A transmission at multiple random times.
3. Does not appear to happen when using voice, although some stations on the
MARS net have mentioned that my transmissions sometimes do drop to very low
levels.
4. This drop out does not occur:
a. On frequencies outside the range as listed in item #1.
b. If the emission is any other type other than USB/LSB.
c. When I turn off the amplifier and only transmitting using the
TS2000 at 100watts.
5. Occasionally, but not every time when this event occurs I hear a relay
inside the KPA500 click
6. I did the following tests in an attempt to located the problem.
a. The conditions occurs whether I am attached to any one of the
antennas I have here.
b. It also occurs when a dummy load is attached.
c. It still occurs when I switch out KAT500 antenna tuners (I have
two of them).

Initially, my thoughts were that the frequency range seems to lie some where
in the boundary between 3.5 and 5.0 band

------------------------------

Message: 14
Date: Fri, 20 Jul 2018 07:01:32 -0700 (MST)
From: "Petr, OK1RP/M0SIS" <[hidden email]>
To: [hidden email]
Subject: Re: [Elecraft] My finished K2
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=us-ascii

Dear Mark,

I am sending big congratulation for nice job. You made your own all band
rig, it works and you can be proud! Amazing job and I am sure you will enjoy
it. My K2 #48xx is still works like champ too.

best fun on the CW bands,
73 - Petr, OK1RP

-----
73 - Petr, OK1RP
"Apple & Elecraft freak"
http://ok1rp.blogspot.com
--
Sent from: http://elecraft.365791.n2.nabble.com/

------------------------------

Message: 15
Date: Fri, 20 Jul 2018 09:31:47 -0500
From: Clay Autery <[hidden email]>
To: [hidden email]
Subject: Re: [Elecraft] K3 Band Data Information Needed
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=utf-8; format=flowed

You do NOT need to use the band data lines. Please read the SPE 1.5K-FA
manual, et al.? CAT via RS232 works fine/better.

There are also other functions you can use.

Watch this video for what you need to know and a lot more...

https://www.youtube.com/watch?v=Ku8Gyl0amRY

73,

______________________
Clay Autery, KY5G
(318) 518-1389

On 20-Jul-18 02:51, Barry Simpson wrote:

> I want to interface my K3 with a newly acquired SPE 1.5KFA amplifier using
> the band data available on the K3 Aux In/Out socket.
>
> Elecraft refer to the data as Bands 1,2,3 and 0 whereas SPE (and other
> manufacturers) call them Bands A,B,C and D.
>
> Please can someone let me know if A,B,C,D = 1,2,3,0 or 0,1,2,3 or some
> other sequence.
>
> Thanks
>
> Barry Simpson VK2BJ
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

------------------------------

Message: 16
Date: Fri, 20 Jul 2018 07:36:25 -0700
From: Paul Baldock <[hidden email]>
To: Roy Koeppe <[hidden email]>,<[hidden email]>
Subject: Re: [Elecraft] KPA1500 latest firmware
Message-ID: <[hidden email]>
Content-Type: text/plain; charset="us-ascii"; format=flowed

Could you describe this problem. I have not seen it.

- Paul KW7Y

At 05:27 AM 7/20/2018, Roy Koeppe wrote:
>Now am waiting for the promised ATU upgrade kit to fix the main
>display cut out problem which occurs on 10

------------------------------

Message: 17
Date: Fri, 20 Jul 2018 08:18:55 -0700 (MST)
From: ab2tc <[hidden email]>
To: [hidden email]
Subject: Re: [Elecraft] Elecraft earns yet more respect
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=UTF-8

Hi Rick,

I am curious as to what mods you had performed:

"It is repaired, UPDATED with all current mods (including moving the wires
that
arced to a different configuration) and is undergoing rigorous testing."

I am running barefoot so arcing is not likely and I do not have any
immediate plans to get an amp, but I wasn't aware there were any mods done
to it.

AB2TC - Knut

Rick WA6NHC-2 wrote

> My KAT500 had an arc between two jumpers atop the PC board, in the
> middle of the KH1 DXpedition rendering it inoperable. I had to switch to
> a manual tuner and switching arrangement (ugh!) while I sent it to
> Elecraft.
>
> Some of the damage was a burned PC board and traces as well as the two
> jumper cables.
>
> I received a phone call this morning from the tech working on it.? It is
> repaired, UPDATED with all current mods (including moving the wires that
> arced to a different configuration) and is undergoing rigorous testing.?
> It will be shipped in a couple days.
>
> Total bill to me:? ONE hour of shop time.? Faced with possible
> replacement, this price alone is well worth it but when you add that
> it's been updated, priceless.
>
> I have to retrain it to the antennas; no problem, I saved the
> configuration and expected this to happen.? I'll run through retraining
> anyway.
>
>
> I tell most folks that if they do me right; I'll sing your praises to
> high heaven.? Do me wrong and I'll make sure there is NO place you can
> hide.
>
> Elecraft:? Once again, you've done good.? Thank you.? THIS is the
> business model to follow.
>
>
> Rick WA6NHC
> <snip>

--
Sent from: http://elecraft.365791.n2.nabble.com/

------------------------------

Message: 18
Date: Fri, 20 Jul 2018 08:27:48 -0700
From: Esquer Dave <[hidden email]>
To: [hidden email]
Subject: [Elecraft] KXPA100 fault issue and low power on 80 and 6m
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=utf-8

Good morning experts,
KXPA100 (serial #996) is back from the Elecraft shop. It spent about 3 weeks unconnected from its KX3. I sent it in because the amp was faulting and shutting down with NO detection of the fault using the KX3 or KXPA100 utilities. The amp relay clicked and ? just shut down in both the CW and SSB portions of the bands running ANY power (15watts or higher). My wire antennas are resonant.

The amp came back with a clean bill of health, my faults could not being replicated in the lab. The KXPA100 came back calibrated with factory test equipment (KX3) values. My 90 days of repair warranty is ticking ?

The tech suggested that maybe the KX3 was overdriving the amp and suggested I do the Elecraft KXPA100 + KX3 Power Calibration. Beforehand, we eliminating cabling and power supply issues between the 2 units.

I have completed the CAL 75 calibration twice (2 times quickly, as he suggested) and with 110 watts selected on the KX3, the ATU in bypass mode and dummy load connected, I get the following power outputs and SWR readings from the KX3 display. 80 and 6 meters are well underperforming ?. So far, I have had no faults, good news! Yes, the dummy load is swept as flat SWR via my RigExpert AA54.

Band Watts SWR TX Gain
1.840 100 1.6 3.4
3.585 58 1.1 4.6
7.120 87 1.2 4.4
10.130 92 1.3 3.7
14.200 97 1.2 3.0
18.100 98 1.2 2.4
21.200 93 1.2 2.8
24.930 86 1.4 2.4
28.400 93 1.5 3.9
50.125 54 1.1 5.0

For TX Gain (tX.X), see the KX3 manual, Appendix B, page 54. If I put the ATU back in with the dummy load and tune each band, the above values really don?t change at all, even on 80 and 6. The tech mentioned that he was not familiar with the TX Gain values and could not share any light on their goodness or validity. Can anyone speak to their reasonableness?

How do I get 80 and 6 meters to full power from the amp? Am I worrying needlessly? Sorry for the long post, help me, gurus!

Dave, K6WDE, KX3 #4599

------------------------------

Message: 19
Date: Fri, 20 Jul 2018 08:30:16 -0700 (MST)
From: ab2tc <[hidden email]>
To: [hidden email]
Subject: Re: [Elecraft] Elecraft earns yet more respect
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=us-ascii

Hi again,

I forgot to mention that lots of other people, maybe most users, do use high
power and will be interested to know if there is an arcing risk in their
tuners, and what can be done about it.

AB2TC - Knut

ab2tc wrote

--
Sent from: http://elecraft.365791.n2.nabble.com/

------------------------------

Message: 20
Date: Fri, 20 Jul 2018 10:37:22 -0500
From: Bob McGraw K4TAX <[hidden email]>
To: [hidden email]
Subject: Re: [Elecraft] KPA500 strange behavior
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=utf-8; format=flowed

How are you handling the PTT??? Direct from the KPA-500 to the TS-2000
via the PA Key on the amp or by the KPA-500 Aux connector pin #10.??
Check cables as one of those commands is being dropped.

Add a ferrite choke on the PTT line if using the PA Key command
method.??? Or, reduce drive power to 5 to 10 watts and see if it
occurred.? If it doesn't occur at 5 to 10 watts of drive, you can bet it
is and RFI issue and the ferrite choke may correct it.

73

Bob, K4TAX

On 7/20/2018 8:58 AM, W1IE wrote:

> Good morning,
>
> I have an interesting problem in which I hope the group here has an easy
> solution.
>
> My KPA 500 is hooked to a TS-2000 outputting 20 watts to the KPA500 and
> displays the following abnormalities :
>
> 1. At frequencies between 4581 kc to 4601.6 (we are working on MARS
> frequencies) using USB and a waveform of M110A, the following
> characteristics are observed.
> 2. The amplifier stops transmitting briefly (less than a blink of an eye)
> and then resumes during a M110A transmission at multiple random times.
> 3. Does not appear to happen when using voice, although some stations on the
> MARS net have mentioned that my transmissions sometimes do drop to very low
> levels.
> 4. This drop out does not occur:
> a. On frequencies outside the range as listed in item #1.
> b. If the emission is any other type other than USB/LSB.
> c. When I turn off the amplifier and only transmitting using the
> TS2000 at 100watts.
> 5. Occasionally, but not every time when this event occurs I hear a relay
> inside the KPA500 click
> 6. I did the following tests in an attempt to located the problem.
> a. The conditions occurs whether I am attached to any one of the
> antennas I have here.
> b. It also occurs when a dummy load is attached.
> c. It still occurs when I switch out KAT500 antenna tuners (I have
> two of them).
>
>
>
>
> Initially, my thoughts were that the frequency range seems to lie some where
> in the boundary between 3.5 and 5.0 band
>
> ______________________________________________________________
> Elecraft mailing list
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> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
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> Please help support this email list: http://www.qsl.net/donate.html
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------------------------------

Message: 21
Date: Fri, 20 Jul 2018 08:38:34 -0700
From: Rick WA6NHC <[hidden email]>
To: [hidden email]
Subject: Re: [Elecraft] Elecraft earns yet more respect
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=utf-8; format=flowed

Hi Knut,

Mine is one of the early models (#257), purchased not long after they
became available and it's never gone home before (kit version).

There are two jumpers on the the top of the board (#12 wire?) that
cross(ed) each other and arced, causing damage.? Now one of the wires is
running under the board so there can be no physical contact.? My take
was that this issue had happened before, now it can't, I didn't ask.

I wasn't given details but some resistors have been swapped and similar
changes but it wasn't explained in detail on the phone.

As with other Elecraft products, some changes happen throughout the life
of the product, so yours may already have the updates.

Mine will return being updated to current specs and mods (plus the PC
traces repaired, spatter from the jumpers arcing burned the board and
some trace).? Once the arcing started, the tuner couldn't take >300
watts, so barefoot won't be an issue.

The internal K3 tuner works well too, a consideration until you go QRO.

73,
Rick nhc

On 7/20/2018 8:18 AM, ab2tc wrote:

> Hi Rick,
>
> I am curious as to what mods you had performed:
>
> "It is repaired, UPDATED with all current mods (including moving the wires
> that
> arced to a different configuration) and is undergoing rigorous testing."
>
> I am running barefoot so arcing is not likely and I do not have any
> immediate plans to get an amp, but I wasn't aware there were any mods done
> to it.
>
> AB2TC - Knut
>
>
> Rick WA6NHC-2 wrote
>> My KAT500 had an arc between two jumpers atop the PC board, in the
>> middle of the KH1 DXpedition rendering it inoperable. I had to switch to
>> a manual tuner and switching arrangement (ugh!) while I sent it to
>> Elecraft.
>>
>> Some of the damage was a burned PC board and traces as well as the two
>> jumper cables.
>>
>> I received a phone call this morning from the tech working on it.? It is
>> repaired, UPDATED with all current mods (including moving the wires that
>> arced to a different configuration) and is undergoing rigorous testing.
>> It will be shipped in a couple days.
>>
>> Total bill to me:? ONE hour of shop time.? Faced with possible
>> replacement, this price alone is well worth it but when you add that
>> it's been updated, priceless.
>>
>> I have to retrain it to the antennas; no problem, I saved the
>> configuration and expected this to happen.? I'll run through retraining
>> anyway.
>>
>>
>> I tell most folks that if they do me right; I'll sing your praises to
>> high heaven.? Do me wrong and I'll make sure there is NO place you can
>> hide.
>>
>> Elecraft:? Once again, you've done good.? Thank you.? THIS is the
>> business model to follow.
>>
>>
>> Rick WA6NHC
>> <snip>
>
>
>
>
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
> ______________________________________________________________
> Elecraft mailing list
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> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

------------------------------

Message: 22
Date: Fri, 20 Jul 2018 08:44:16 -0700
From: Jack Brindle <[hidden email]>
To: W1IE <[hidden email]>
Cc: [hidden email]
Subject: Re: [Elecraft] KPA500 strange behavior
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=us-ascii

4600 KHz is the threshold for 80/60 meters. Below is 80, above 60. Your KPA is trying to decide which band it needs to be on and is switching back and forth with the modulation as it causes the frequency to change.
The delay is simply the band change. It would require firmware changes to fix this one.

73,
Jack, W6FB

> On Jul 20, 2018, at 6:58 AM, W1IE <[hidden email]> wrote:
>
> Good morning,
>
> I have an interesting problem in which I hope the group here has an easy
> solution.
>
> My KPA 500 is hooked to a TS-2000 outputting 20 watts to the KPA500 and
> displays the following abnormalities :
>
> 1. At frequencies between 4581 kc to 4601.6 (we are working on MARS
> frequencies) using USB and a waveform of M110A, the following
> characteristics are observed.
> 2. The amplifier stops transmitting briefly (less than a blink of an eye)
> and then resumes during a M110A transmission at multiple random times.
> 3. Does not appear to happen when using voice, although some stations on the
> MARS net have mentioned that my transmissions sometimes do drop to very low
> levels.
> 4. This drop out does not occur:
> a. On frequencies outside the range as listed in item #1.
> b. If the emission is any other type other than USB/LSB.
> c. When I turn off the amplifier and only transmitting using the
> TS2000 at 100watts.
> 5. Occasionally, but not every time when this event occurs I hear a relay
> inside the KPA500 click
> 6. I did the following tests in an attempt to located the problem.
> a. The conditions occurs whether I am attached to any one of the
> antennas I have here.
> b. It also occurs when a dummy load is attached.
> c. It still occurs when I switch out KAT500 antenna tuners (I have
> two of them).
>
>
>
>
> Initially, my thoughts were that the frequency range seems to lie some where
> in the boundary between 3.5 and 5.0 band
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

------------------------------

Message: 23
Date: Fri, 20 Jul 2018 11:45:15 -0400
From: John Huffman <[hidden email]>
To: Elecraft List <[hidden email]>
Subject: [Elecraft] For Sale KRC2
Message-ID:
<[hidden email]>
Content-Type: text/plain; charset="UTF-8"

For Sale - KRC2 Band Decoder For the K2 and Most HF Rigs

Full specs at http://www.elecraft.com/KRC2/krc2.htm

Includes cable for Ten Tec Orion.

$75 plus shipping. Reply off line to email address in QRZ.COM

73 de K1ESE
John

------------------------------

Message: 24
Date: Fri, 20 Jul 2018 10:46:31 -0500
From: "Roy Koeppe" <[hidden email]>
To: <[hidden email]>
Subject: Re: [Elecraft] KPA1500 latest firmware
Message-ID: <14DA767F850E4221B89B42B88335D304@ROYKOEPPEHP>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=response

Hi Paul,

When attempting to transmit or 10 or 6 meters, the left half of the display
instantly blanks out and remains that way till you reboot the amp power
switch. Has been reported by several with early serial numbers like my #160.

Roy K6XK

-----Original Message-----
From: Paul Baldock
Sent: Friday, July 20, 2018 9:36 AM
To: Roy Koeppe ; [hidden email]
Subject: Re: [Elecraft] KPA1500 latest firmware

Could you describe this problem. I have not seen it.

- Paul KW7Y

At 05:27 AM 7/20/2018, Roy Koeppe wrote:
>Now am waiting for the promised ATU upgrade kit to fix the main display cut
>out problem which occurs on 10

------------------------------

Message: 25
Date: Fri, 20 Jul 2018 12:01:27 -0400
From: "Charlie T" <[hidden email]>
To: <[hidden email]>
Subject: Re: [Elecraft] Elecraft earns yet more respect
Message-ID: <009601d42042$edca5e60$c95f1b20$@erols.com>
Content-Type: text/plain; charset="utf-8"

Any thought on when (or if) a kit version of the 1500 watt amp will be available?

73, Charlie k3ICH

------------------------------

Message: 26
Date: Fri, 20 Jul 2018 11:04:30 -0500
From: "AB4IQ" <[hidden email]>
To: "'Roy Koeppe'" <[hidden email]>, <[hidden email]>
Subject: Re: [Elecraft] KPA1500 latest firmware
Message-ID: <006401d42043$58610d00$09232700$@comcast.net>
Content-Type: text/plain; charset="us-ascii"

I am apparently fortunate. My KPA1500 is #29 and does not have that issue
at full power out on 10 or 6.

Ed.. AB4IQ

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Roy Koeppe
Sent: Friday, July 20, 2018 10:47 AM
To: [hidden email]
Subject: Re: [Elecraft] KPA1500 latest firmware

Hi Paul,

When attempting to transmit or 10 or 6 meters, the left half of the display
instantly blanks out and remains that way till you reboot the amp power
switch. Has been reported by several with early serial numbers like my #160.

Roy K6XK

-----Original Message-----
From: Paul Baldock
Sent: Friday, July 20, 2018 9:36 AM
To: Roy Koeppe ; [hidden email]
Subject: Re: [Elecraft] KPA1500 latest firmware

Could you describe this problem. I have not seen it.

- Paul KW7Y

At 05:27 AM 7/20/2018, Roy Koeppe wrote:
>Now am waiting for the promised ATU upgrade kit to fix the main display
>cut out problem which occurs on 10

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

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

------------------------------

Message: 27
Date: Fri, 20 Jul 2018 09:05:55 -0700
From: Mark Petrovic <[hidden email]>
To: [hidden email]
Cc: [hidden email]
Subject: Re: [Elecraft] K2 external speaker hole
Message-ID:
<[hidden email]>
Content-Type: text/plain; charset="UTF-8"

Thanks, Don. Yes, I found I had to ream the existing hole *very* little,
maybe one or two 1/100 of an inch, for the jack to pass through without
forcing it. The difference did not feel like extra paint; it felt like the
hole was in fact just a bit too small.

On Thu, Jul 19, 2018 at 8:49 AM Don Wilhelm <[hidden email]> wrote:

> Mark,
>
> The jack *should* fit through the hole, but I also know that it does not
> with the jack supplied.
> So ream out the hole in the top cover. I use a thin bladed knife, but a
> drill bit or a proper reamer will work.
> You only have to take a little metal from the inside of the hole.
>
> 73,
> Don W3FPR
>
> On 7/19/2018 11:00 AM, Mark Petrovic wrote:
> > In the top cover for my K2 S/N/ 7809, the external speaker hole is way
> too
> > small for the jack to pass through. Is it the design intent of the K2
> that
> > this jack be screwed in? Or should it pass through without forcing it?
> Or
> > does it matter?
>

--
Mark

------------------------------

Message: 28
Date: Fri, 20 Jul 2018 12:10:34 -0400
From: AE0MM <[hidden email]>
To: Elecraft Reflector <[hidden email]>
Subject: [Elecraft] K2 RF Capacitor ID
Message-ID:
<TvY5X-6BlptTMIfrWtkhmIZf-VonO98Bps_pXPW8NkOLajZnd8BS33yVYaHCWo2dX9M8UNYrVIWzQRnQAC7UugyXXviX7cjzkGRtIXG6acg=@protonmail.com>

Content-Type: text/plain; charset=UTF-8

I'm having trouble identifying a few capacitors used in the assembly of the K2 RF board.

C72: "271"
C45: NPO "1", black top
C33: 2.2pf "2R2" or "2"
C198: NPO "27" or "272"

What I have:
a blue "010"
a blue "030"
a yellow "270"
a yellow "229"

I suspect the "229" is a 2.2pf capacitor for C33.
The "270" could be 27 or 270pf, but I'm not sure; it might be for C72.
The "010" could be the 1pf for C45, but it doesn't have a black top.
Could the "030" be for C198? This suggests it could be: http://www.elecraft.com/Apps/caps.htm

I'm having trouble measuring capacitance for these tiny capacitors. Values are all over the place. Any suggestions for verifying the values and positively IDing them?

Thanks,
--ae0mm

------------------------------

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End of Elecraft Digest, Vol 171, Issue 42
*****************************************
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