[Elecraft] K3 won't shut off?

[iain macdonnell - N6ML]

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
<bill at wjschmidt.com> 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:  bill at wjschmidt.com
>
> -----Original Message-----
> From: dseven at dseven.org [mailto:dseven at dseven.org] On Behalf Of iain
> macdonnell - N6ML
> Sent: Monday, December 31, 2012 3:18 PM
> To: bill at wjschmidt.com
> 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
> <bill at wjschmidt.com> 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:bill at wjschmidt.com> bill at wjschmidt.com
>>
>>
>>
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