[Elecraft] Elecraft Digest, Vol 114, Issue 22 - Re K3 Frozen on Power-up

[Dauer, Edward]

Re K3 Frozen on Power-up

Identical problem here when the K3-KAT-KPA were first put together:  K3
froze when the KAT wasn't turned on first.  Nothing worked until the
cabling was disconnected, the K3 was turned on and off again, the cable
was reconnected and the KAT turned on first. I don't know why either.

I've tried two solutions:  (1) Repeat this mantra once a day - "KAT goes
on first."  (2) More practical - the KAT does not need to be switched on
and off if its supply power is switched on and off.  When it feels its
supply voltage coming (from a wall wart in my case), it comes on all by
itself.  So, I have a master 117 VAC power switch which switches the line
to the K3's DC supply and to the KAT's supply (and most everything else.)
When it is switched on, the KAT fires up instantly, before the K3 can
(since it requires pressing the power button.)  No problems since.

For us liberal-arts types it's sometimes OK when a problem can be solved
without necessarily being understood.

Ed, KN1CBR


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>Message: 27
>Date: Sun, 13 Oct 2013 15:37:47 -0700 (GMT-07:00)
>From: Don Putnick <don.na6z at earthlink.net>
>To: "Cady,Fred" <fcady at ece.montana.edu>
>Cc: 'Elecraft List' <elecraft at mailman.qth.net>
>Subject: Re: [Elecraft] [K3] K3 frozen on power-up
>Message-ID:
>	<10811282.1381703867560.JavaMail.root at mswamui-billy.atl.sa.earthlink.net>
>	
>Content-Type: text/plain; charset=UTF-8
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>Thanks, Fred. After disconnecting the KPAK3AUX cable I was able to reload
>the config
>file. The K3 is feeling much better. Now to diagnose what was pulling the
>AUXBUS down.
>73 Don NA6Z 
>
>-----Original Message-----
>>From: "Cady, Fred" <fcady at ece.montana.edu>
>>Sent: Oct 13, 2013 2:40 PM
>>To: 'Don Putnick' <don.na6z at earthlink.net>, 'Elecraft List'
>><elecraft at mailman.qth.net>
>>Subject: RE: [Elecraft] [K3] K3 frozen on power-up
>>
>>Hi Don,
>>I know you turned the KAT and KPA on before the K3 but the symptoms you
>>describe sound like what happens if the KAT is not turned on first,
>>i.e., sounds like something is pulling the AUXBUS down.
>>Try disconnecting the KPAK3AUX cable from the K3 and see if the K3 comes
>>up OK. If it does, that will give you a clue where to start trouble
>>shooting.
>>Cheers,
>>Fred KE7X
>>
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