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K3 won't shut off?

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Dr. William J. Schmidt, II

K3 won't shut off?

So I connected my PR6 - 6 meter preamp to my K3 for the first time last week
and work some DX. At the end of the day I go to shut the radio off and the
display goes blank (hear the relays disengage) but all of the LEDs are still
lit on the radio. and it will not turn back on except to cycle the power on
the power supply. I discuss this with a friend and he reminds me that there
was a MOD for K3's to put a diode on the KPA3 board for the 12V sense
circuit, but after looking at the MOD sheet on the Elecraft website, it says
that this MOD was incorporated into the radio as of 2009 (my radio less than
a year old). I remove the fans to check for the 1N4148 on P68A of the KPA3
and it's not there. So two questions. Has anyone else experienced this
phenomena, and does anyone know. was that diode actually incorporated into
the radio on the board somewhere else and mine is just bad?

Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ/ PJ4HZ

Owner - Operator

Big Signal Ranch

Staunton, Illinois

email: <mailto:[hidden email]> [hidden email]

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Iain MacDonnell - N6ML-2

Re: K3 won't shut off?

Does the K3 power off fully if you disconnect the ACC connector? It
sounds like something is pulling pin 8 down....

73,

~iain / N6ML

On Mon, Dec 31, 2012 at 12:20 PM, Dr. William J. Schmidt, II
<[hidden email]> wrote:

> So I connected my PR6 - 6 meter preamp to my K3 for the first time last week
> and work some DX. At the end of the day I go to shut the radio off and the
> display goes blank (hear the relays disengage) but all of the LEDs are still
> lit on the radio. and it will not turn back on except to cycle the power on
> the power supply. I discuss this with a friend and he reminds me that there
> was a MOD for K3's to put a diode on the KPA3 board for the 12V sense
> circuit, but after looking at the MOD sheet on the Elecraft website, it says
> that this MOD was incorporated into the radio as of 2009 (my radio less than
> a year old). I remove the fans to check for the 1N4148 on P68A of the KPA3
> and it's not there. So two questions. Has anyone else experienced this
> phenomena, and does anyone know. was that diode actually incorporated into
> the radio on the board somewhere else and mine is just bad?
>
>
>
>
>
> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ/ PJ4HZ
>
>
>
> Owner - Operator
>
> Big Signal Ranch
>
> Staunton, Illinois
>
>
>
> email: <mailto:[hidden email]> [hidden email]
>
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

Don Wilhelm-4

Re: K3 won't shut off?

In reply to this post by Dr. William J. Schmidt, II

I cannot be certain, but I would expect the production would be of the
SMD variety rather than the discrete leaded diode that was used for the mod.

73,
Don W3FPR

On 12/31/2012 3:20 PM, Dr. William J. Schmidt, II wrote:

Dr. William J. Schmidt, II

Re: K3 won't shut off?

In reply to this post by Iain MacDonnell - N6ML-2

Yes, it works fine with the preamp completely removed...

Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ

Owner - Operator
Big Signal Ranch
Staunton, Illinois

email: [hidden email]

-----Original Message-----
From: [hidden email] [mailto:[hidden email]] On Behalf Of iain
macdonnell - N6ML
Sent: Monday, December 31, 2012 3:18 PM
To: [hidden email]
Cc: Elecraft Mailing List
Subject: Re: [Elecraft] K3 won't shut off?

Does the K3 power off fully if you disconnect the ACC connector? It sounds
like something is pulling pin 8 down....

73,

~iain / N6ML

On Mon, Dec 31, 2012 at 12:20 PM, Dr. William J. Schmidt, II
<[hidden email]> wrote:

> So I connected my PR6 - 6 meter preamp to my K3 for the first time
> last week and work some DX. At the end of the day I go to shut the
> radio off and the display goes blank (hear the relays disengage) but
> all of the LEDs are still lit on the radio. and it will not turn back
> on except to cycle the power on the power supply. I discuss this with
> a friend and he reminds me that there was a MOD for K3's to put a
> diode on the KPA3 board for the 12V sense circuit, but after looking
> at the MOD sheet on the Elecraft website, it says that this MOD was
> incorporated into the radio as of 2009 (my radio less than a year
> old). I remove the fans to check for the 1N4148 on P68A of the KPA3
> and it's not there. So two questions. Has anyone else experienced
> this phenomena, and does anyone know. was that diode actually incorporated

into the radio on the board somewhere else and mine is just bad?

>
>
>
>
>
> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ/ PJ4HZ
>
>
>
> Owner - Operator
>
> Big Signal Ranch
>
> Staunton, Illinois
>
>
>
> email: <mailto:[hidden email]> [hidden email]
>
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net Please help support this email
> list: http://www.qsl.net/donate.html

Iain MacDonnell - N6ML-2

Re: K3 won't shut off?

I would check inside the DE15 connector - maybe something is shorting
pin 8 to ground inside there.

73,

~iain / N6ML

On Mon, Dec 31, 2012 at 1:49 PM, Dr. William J. Schmidt, II
<[hidden email]> wrote:

> Yes, it works fine with the preamp completely removed...
>
>
> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ
>
> Owner - Operator
> Big Signal Ranch
> Staunton, Illinois
>
> email: [hidden email]
>
> -----Original Message-----
> From: [hidden email] [mailto:[hidden email]] On Behalf Of iain
> macdonnell - N6ML
> Sent: Monday, December 31, 2012 3:18 PM
> To: [hidden email]
> Cc: Elecraft Mailing List
> Subject: Re: [Elecraft] K3 won't shut off?
>
> Does the K3 power off fully if you disconnect the ACC connector? It sounds
> like something is pulling pin 8 down....
>
> 73,
>
> ~iain / N6ML
>
>
> On Mon, Dec 31, 2012 at 12:20 PM, Dr. William J. Schmidt, II
> <[hidden email]> wrote:
>> So I connected my PR6 - 6 meter preamp to my K3 for the first time
>> last week and work some DX. At the end of the day I go to shut the
>> radio off and the display goes blank (hear the relays disengage) but
>> all of the LEDs are still lit on the radio. and it will not turn back
>> on except to cycle the power on the power supply. I discuss this with
>> a friend and he reminds me that there was a MOD for K3's to put a
>> diode on the KPA3 board for the 12V sense circuit, but after looking
>> at the MOD sheet on the Elecraft website, it says that this MOD was
>> incorporated into the radio as of 2009 (my radio less than a year
>> old). I remove the fans to check for the 1N4148 on P68A of the KPA3
>> and it's not there. So two questions. Has anyone else experienced
>> this phenomena, and does anyone know. was that diode actually incorporated
> into the radio on the board somewhere else and mine is just bad?
>>
>>
>>
>>
>>
>> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ/ PJ4HZ
>>
>>
>>
>> Owner - Operator
>>
>> Big Signal Ranch
>>
>> Staunton, Illinois
>>
>>
>>
>> email: <mailto:[hidden email]> [hidden email]
>>
>>
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net Please help support this email
>> list: http://www.qsl.net/donate.html
>

Milt -- N5IA

Question

In reply to this post by Don Wilhelm-4

Don and the list,

This is my first time to need any guidance. I appreciate in advance the
reply to my question.

The BNC connector for the AUX RF input has become loose on my K3.

I cannot determine the best manner of accessing the inside of the rear panel
so I can tighten the nut on the rear of the connector body.

It has been 4+ years since I have had this radio open and do not remember
(nor can I find in the construction manual) the most efficient, least
obtrusive method of gaining access to the rear of the connector.

All suggestions are appreciated.

Thanks, and Happy New Year to everyone.

de Milt, N5IA

-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2805 / Virus Database: 2637/5975 - Release Date: 12/20/12
Internal Virus Database is out of date.

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

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Don Wilhelm-4

Re: Question

Milt,

The most direct way is to remove the right side panel.
You will find instructions to do that on page 26 of the KRX3
installation manual. You will probably have to remove the KRX3 assembly
to gain access to the nuts holding the two regulators to the side panel.

73,
Don W3FPR

On 12/31/2012 5:16 PM, Milt -- N5IA wrote:

> Don and the list,
>
> This is my first time to need any guidance. I appreciate in advance
> the reply to my question.
>
> The BNC connector for the AUX RF input has become loose on my K3.
>
> I cannot determine the best manner of accessing the inside of the rear
> panel so I can tighten the nut on the rear of the connector body.
>
> It has been 4+ years since I have had this radio open and do not
> remember (nor can I find in the construction manual) the most
> efficient, least obtrusive method of gaining access to the rear of the
> connector.
>
> All suggestions are appreciated.
>
> Thanks, and Happy New Year to everyone.
>
> de Milt, N5IA
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2013.0.2805 / Virus Database: 2637/5975 - Release Date: 12/20/12
> Internal Virus Database is out of date.
>
> ______________________________________________________________
> 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
>

Milt -- N5IA

Re: Question

OK Don.

That is what I had figured out but wanted to know if there was a simpler
method. Yeah, the KRX3 has to come out to get at the regulator nuts. They
are too tight between the KRX3 and the side panel to do otherwise. That was
what had me stumped. Didn't want to disturb them. But, it is what it is.
Now to find the KRX3 manual. Thanks, and Happy new Year.

de Milt, N5IA

-----Original Message-----
From: Don Wilhelm
Sent: Monday, December 31, 2012 4:16 PM
To: Milt -- N5IA
Cc: 'Elecraft Mailing List'
Subject: Re: [Elecraft] Question

Milt,

The most direct way is to remove the right side panel.
You will find instructions to do that on page 26 of the KRX3
installation manual. You will probably have to remove the KRX3 assembly
to gain access to the nuts holding the two regulators to the side panel.

73,
Don W3FPR

On 12/31/2012 5:16 PM, Milt -- N5IA wrote:

> Don and the list,
>
> This is my first time to need any guidance. I appreciate in advance the
> reply to my question.
>
> The BNC connector for the AUX RF input has become loose on my K3.
>
> I cannot determine the best manner of accessing the inside of the rear
> panel so I can tighten the nut on the rear of the connector body.
>
> It has been 4+ years since I have had this radio open and do not remember
> (nor can I find in the construction manual) the most efficient, least
> obtrusive method of gaining access to the rear of the connector.
>
> All suggestions are appreciated.
>
> Thanks, and Happy New Year to everyone.
>
> de Milt, N5IA
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2013.0.2805 / Virus Database: 2637/5975 - Release Date: 12/20/12
> Internal Virus Database is out of date.
>
> ______________________________________________________________
> 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
>

-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2805 / Virus Database: 2637/5975 - Release Date: 12/20/12
Internal Virus Database is out of date.

-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.2805 / Virus Database: 2637/5975 - Release Date: 12/20/12
Internal Virus Database is out of date.

______________________________________________________________
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

Rick Prather-2

Re: Question

Milt,

Don't forget that the manual is available online.

Rick
K6LE

On 12/31/2012, at 3:35 , "Milt -- N5IA" <[hidden email]> wrote:

> OK Don.
>
> That is what I had figured out but wanted to know if there was a simpler method. Yeah, the KRX3 has to come out to get at the regulator nuts. They are too tight between the KRX3 and the side panel to do otherwise. That was what had me stumped. Didn't want to disturb them. But, it is what it is. Now to find the KRX3 manual. Thanks, and Happy new Year.
>
> de Milt, N5IA

______________________________________________________________
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

Dr. William J. Schmidt, II

Re: K3 won't shut off?

In reply to this post by Iain MacDonnell - N6ML-2

I found the problem... There is a jumper inside the preamp that needs to be
removed when used with the K3 and the accessory connector. I thought I
removed it when it arrived, but I guess my age is starting to show...

Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ

Owner - Operator
Big Signal Ranch
Staunton, Illinois

email: [hidden email]

-----Original Message-----
From: [hidden email] [mailto:[hidden email]] On Behalf Of iain
macdonnell - N6ML
Sent: Monday, December 31, 2012 4:04 PM
To: [hidden email]
Cc: Elecraft Mailing List
Subject: Re: [Elecraft] K3 won't shut off?

I would check inside the DE15 connector - maybe something is shorting pin 8
to ground inside there.

73,

~iain / N6ML

On Mon, Dec 31, 2012 at 1:49 PM, Dr. William J. Schmidt, II
<[hidden email]> wrote:

> Yes, it works fine with the preamp completely removed...
>
>
> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ
>
> Owner - Operator
> Big Signal Ranch
> Staunton, Illinois
>
> email: [hidden email]
>
> -----Original Message-----
> From: [hidden email] [mailto:[hidden email]] On Behalf Of iain
> macdonnell - N6ML
> Sent: Monday, December 31, 2012 3:18 PM
> To: [hidden email]
> Cc: Elecraft Mailing List
> Subject: Re: [Elecraft] K3 won't shut off?
>
> Does the K3 power off fully if you disconnect the ACC connector? It
> sounds like something is pulling pin 8 down....
>
> 73,
>
> ~iain / N6ML
>
>
> On Mon, Dec 31, 2012 at 12:20 PM, Dr. William J. Schmidt, II
> <[hidden email]> wrote:
>> So I connected my PR6 - 6 meter preamp to my K3 for the first time
>> last week and work some DX. At the end of the day I go to shut the
>> radio off and the display goes blank (hear the relays disengage) but
>> all of the LEDs are still lit on the radio. and it will not turn back
>> on except to cycle the power on the power supply. I discuss this
>> with a friend and he reminds me that there was a MOD for K3's to put
>> a diode on the KPA3 board for the 12V sense circuit, but after
>> looking at the MOD sheet on the Elecraft website, it says that this
>> MOD was incorporated into the radio as of 2009 (my radio less than a
>> year old). I remove the fans to check for the 1N4148 on P68A of the
>> KPA3 and it's not there. So two questions. Has anyone else
>> experienced this phenomena, and does anyone know. was that diode
>> actually incorporated
> into the radio on the board somewhere else and mine is just bad?
>>
>>
>>
>>
>>
>> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ/ PJ4HZ
>>
>>
>>
>> Owner - Operator
>>
>> Big Signal Ranch
>>
>> Staunton, Illinois
>>
>>
>>
>> email: <mailto:[hidden email]> [hidden email]
>>
>>
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net Please help support this
>> email
>> list: http://www.qsl.net/donate.html
>

Matt Zilmer

Re: K3 won't shut off?

None of us are immune to ageing effects.

matt W6NIA

On Tue, 01 Jan 2013 01:28:39 -0600, you wrote:

>I found the problem... There is a jumper inside the preamp that needs to be
>removed when used with the K3 and the accessory connector. I thought I
>removed it when it arrived, but I guess my age is starting to show...
>
>
>Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ
>
>Owner - Operator
>Big Signal Ranch
>Staunton, Illinois
>
>email: [hidden email]
>
>
>-----Original Message-----
>From: [hidden email] [mailto:[hidden email]] On Behalf Of iain
>macdonnell - N6ML
>Sent: Monday, December 31, 2012 4:04 PM
>To: [hidden email]
>Cc: Elecraft Mailing List
>Subject: Re: [Elecraft] K3 won't shut off?
>
>I would check inside the DE15 connector - maybe something is shorting pin 8
>to ground inside there.
>
>73,
>
> ~iain / N6ML
>
>
>On Mon, Dec 31, 2012 at 1:49 PM, Dr. William J. Schmidt, II
><[hidden email]> wrote:
>> Yes, it works fine with the preamp completely removed...
>>
>>
>> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ
>>
>> Owner - Operator
>> Big Signal Ranch
>> Staunton, Illinois
>>
>> email: [hidden email]
>>
>> -----Original Message-----
>> From: [hidden email] [mailto:[hidden email]] On Behalf Of iain
>> macdonnell - N6ML
>> Sent: Monday, December 31, 2012 3:18 PM
>> To: [hidden email]
>> Cc: Elecraft Mailing List
>> Subject: Re: [Elecraft] K3 won't shut off?
>>
>> Does the K3 power off fully if you disconnect the ACC connector? It
>> sounds like something is pulling pin 8 down....
>>
>> 73,
>>
>> ~iain / N6ML
>>
>>
>> On Mon, Dec 31, 2012 at 12:20 PM, Dr. William J. Schmidt, II
>> <[hidden email]> wrote:
>>> So I connected my PR6 - 6 meter preamp to my K3 for the first time
>>> last week and work some DX. At the end of the day I go to shut the
>>> radio off and the display goes blank (hear the relays disengage) but
>>> all of the LEDs are still lit on the radio. and it will not turn back
>>> on except to cycle the power on the power supply. I discuss this
>>> with a friend and he reminds me that there was a MOD for K3's to put
>>> a diode on the KPA3 board for the 12V sense circuit, but after
>>> looking at the MOD sheet on the Elecraft website, it says that this
>>> MOD was incorporated into the radio as of 2009 (my radio less than a
>>> year old). I remove the fans to check for the 1N4148 on P68A of the
>>> KPA3 and it's not there. So two questions. Has anyone else
>>> experienced this phenomena, and does anyone know. was that diode
>>> actually incorporated
>> into the radio on the board somewhere else and mine is just bad?
>>>
>>>
>>>
>>>
>>>
>>> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ/ PJ4HZ
>>>
>>>
>>>
>>> Owner - Operator
>>>
>>> Big Signal Ranch
>>>
>>> Staunton, Illinois
>>>
>>>
>>>
>>> email: <mailto:[hidden email]> [hidden email]
>>>
>>>
>>>
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> This list hosted by: http://www.qsl.net Please help support this
>>> email
>>> list: http://www.qsl.net/donate.html
>>
>
>______________________________________________________________
>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

N0AZZ

Re: K3 won't shut off?

In reply to this post by Dr. William J. Schmidt, II

I got in late on this thread but are you refuting to the PR6 preamp? That
was connected and not letting the K3 shut down because of it being connected
to the aux 12v connector on the rear of the K3?

If this was what was happening I just installed a PR6 on an ser # 5299 and
had no problems I "did not" do anything with a jumper inside. Even though I
don't have that problem do I need to do this?

73,
Fred/N0AZZ

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Dr. William J.
Schmidt, II
Sent: Tuesday, January 01, 2013 1:29 AM
To: 'iain macdonnell - N6ML'
Cc: 'Elecraft Mailing List'
Subject: Re: [Elecraft] K3 won't shut off?

I found the problem... There is a jumper inside the preamp that needs to be
removed when used with the K3 and the accessory connector. I thought I
removed it when it arrived, but I guess my age is starting to show...

Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ

Owner - Operator
Big Signal Ranch
Staunton, Illinois

email: [hidden email]

-----Original Message-----
From: [hidden email] [mailto:[hidden email]] On Behalf Of iain
macdonnell - N6ML
Sent: Monday, December 31, 2012 4:04 PM
To: [hidden email]
Cc: Elecraft Mailing List
Subject: Re: [Elecraft] K3 won't shut off?

I would check inside the DE15 connector - maybe something is shorting pin 8
to ground inside there.

73,

~iain / N6ML

On Mon, Dec 31, 2012 at 1:49 PM, Dr. William J. Schmidt, II
<[hidden email]> wrote:

> Yes, it works fine with the preamp completely removed...
>
>
> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ
>
> Owner - Operator
> Big Signal Ranch
> Staunton, Illinois
>
> email: [hidden email]
>
> -----Original Message-----
> From: [hidden email] [mailto:[hidden email]] On Behalf Of iain
> macdonnell - N6ML
> Sent: Monday, December 31, 2012 3:18 PM
> To: [hidden email]
> Cc: Elecraft Mailing List
> Subject: Re: [Elecraft] K3 won't shut off?
>
> Does the K3 power off fully if you disconnect the ACC connector? It
> sounds like something is pulling pin 8 down....
>
> 73,
>
> ~iain / N6ML
>
>
> On Mon, Dec 31, 2012 at 12:20 PM, Dr. William J. Schmidt, II
> <[hidden email]> wrote:
>> So I connected my PR6 - 6 meter preamp to my K3 for the first time
>> last week and work some DX. At the end of the day I go to shut the
>> radio off and the display goes blank (hear the relays disengage) but
>> all of the LEDs are still lit on the radio. and it will not turn back
>> on except to cycle the power on the power supply. I discuss this
>> with a friend and he reminds me that there was a MOD for K3's to put
>> a diode on the KPA3 board for the 12V sense circuit, but after
>> looking at the MOD sheet on the Elecraft website, it says that this
>> MOD was incorporated into the radio as of 2009 (my radio less than a
>> year old). I remove the fans to check for the 1N4148 on P68A of the
>> KPA3 and it's not there. So two questions. Has anyone else
>> experienced this phenomena, and does anyone know. was that diode
>> actually incorporated
> into the radio on the board somewhere else and mine is just bad?
>>
>>
>>
>>
>>
>> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ/ PJ4HZ
>>
>>
>>
>> Owner - Operator
>>
>> Big Signal Ranch
>>
>> Staunton, Illinois
>>
>>
>>
>> email: <mailto:[hidden email]> [hidden email]
>>
>>
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
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>> email
>> list: http://www.qsl.net/donate.html
>

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Dr. William J. Schmidt, II

Re: K3 won't shut off?

In reply to this post by Matt Zilmer

Well... spoke too soon... still does it. Guess I need to get the scope out
and figure this out...

Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ

Owner - Operator
Big Signal Ranch
Staunton, Illinois

email: [hidden email]

-----Original Message-----
From: Matt Zilmer [mailto:[hidden email]]
Sent: Tuesday, January 01, 2013 1:59 AM
To: [hidden email]
Cc: 'iain macdonnell - N6ML'; 'Elecraft Mailing List'
Subject: Re: [Elecraft] K3 won't shut off?

None of us are immune to ageing effects.

matt W6NIA

On Tue, 01 Jan 2013 01:28:39 -0600, you wrote:

>I found the problem... There is a jumper inside the preamp that needs
>to be removed when used with the K3 and the accessory connector. I
>thought I removed it when it arrived, but I guess my age is starting to
show...

>
>
>Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ
>
>Owner - Operator
>Big Signal Ranch
>Staunton, Illinois
>
>email: [hidden email]
>
>
>-----Original Message-----
>From: [hidden email] [mailto:[hidden email]] On Behalf Of iain
>macdonnell - N6ML
>Sent: Monday, December 31, 2012 4:04 PM
>To: [hidden email]
>Cc: Elecraft Mailing List
>Subject: Re: [Elecraft] K3 won't shut off?
>
>I would check inside the DE15 connector - maybe something is shorting
>pin 8 to ground inside there.
>
>73,
>
> ~iain / N6ML
>
>
>On Mon, Dec 31, 2012 at 1:49 PM, Dr. William J. Schmidt, II
><[hidden email]> wrote:
>> Yes, it works fine with the preamp completely removed...
>>
>>
>> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ
>>
>> Owner - Operator
>> Big Signal Ranch
>> Staunton, Illinois
>>
>> email: [hidden email]
>>
>> -----Original Message-----
>> From: [hidden email] [mailto:[hidden email]] On Behalf Of iain
>> macdonnell - N6ML
>> Sent: Monday, December 31, 2012 3:18 PM
>> To: [hidden email]
>> Cc: Elecraft Mailing List
>> Subject: Re: [Elecraft] K3 won't shut off?
>>
>> Does the K3 power off fully if you disconnect the ACC connector? It
>> sounds like something is pulling pin 8 down....
>>
>> 73,
>>
>> ~iain / N6ML
>>
>>
>> On Mon, Dec 31, 2012 at 12:20 PM, Dr. William J. Schmidt, II
>> <[hidden email]> wrote:
>>> So I connected my PR6 - 6 meter preamp to my K3 for the first time
>>> last week and work some DX. At the end of the day I go to shut the
>>> radio off and the display goes blank (hear the relays disengage) but
>>> all of the LEDs are still lit on the radio. and it will not turn
>>> back on except to cycle the power on the power supply. I discuss
>>> this with a friend and he reminds me that there was a MOD for K3's
>>> to put a diode on the KPA3 board for the 12V sense circuit, but
>>> after looking at the MOD sheet on the Elecraft website, it says that
>>> this MOD was incorporated into the radio as of 2009 (my radio less
>>> than a year old). I remove the fans to check for the 1N4148 on P68A
>>> of the
>>> KPA3 and it's not there. So two questions. Has anyone else
>>> experienced this phenomena, and does anyone know. was that diode
>>> actually incorporated
>> into the radio on the board somewhere else and mine is just bad?
>>>
>>>
>>>
>>>
>>>
>>> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ/ PJ4HZ
>>>
>>>
>>>
>>> Owner - Operator
>>>
>>> Big Signal Ranch
>>>
>>> Staunton, Illinois
>>>
>>>
>>>
>>> email: <mailto:[hidden email]> [hidden email]
>>>
>>>
>>>
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> This list hosted by: http://www.qsl.net Please help support this
>>> email
>>> list: http://www.qsl.net/donate.html
>>
>
>______________________________________________________________
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>
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