[Elecraft] K3 won't shut off?

[Dr. William J. Schmidt, II]

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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