[Elecraft] K3 Key out

[W0MU Mike Fatchett]

He has a relay.

The key out is grounded at all times.  Sounds like a component failure of
some type.

 


"A slip of the foot you may soon recover, but a slip of the tongue you may
never get over." Ben Franklin
-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Iain MacDonnell -
N6ML
Sent: Sunday, February 08, 2009 4:09 PM
To: Phil LaMarche
Cc: elecraft at mailman.qth.net; dennis at lutronx.com
Subject: Re: [Elecraft] K3 Key out


Phil,

I had the same issue when I hooked up an SB200. Because the keying voltage
in the amp is negative, you can't connect to the K3 directly. I put in an
intermediate relay, which works OK. I might install the Harbach "soft-key"
mod at some point...

Have you put a continuity tester across "KEY OUT"? So long as you connect
the positive side to the center, it should only read closed when the K3 is
transmitting.

     ~Iain



Phil LaMarche wrote:
> I've had many wonderful emails with suggestions and I thank you.
>  
> Let me be more specific:  The Amp Keyer works OK.  The 30L-1 keys OK.  
> The tested cable coming out of the Key Out on the back of the K3 isn't 
> working properly.  It's in the closed position.  If I take the other 
> end of the cable from the Key Out and plug into the amp keyer, it keys 
> it without my keying the K3.  If I hook it direct to the 30L-1 it keys 
> the amp.  I'm presuming the circuit is faulty in the K3?  Ideas?
>  
> Phil
>  
> 
> Philip LaMarche
> LaMarche Enterprises, Inc.
>  <http://www.instantgourmetspices.com/> www.instantgourmetspices.com
> 
> www.w9dvm.com <http://www.w9dvm.com/>
> 800-395-7795 pin 02
> 727-944-3226
> FAX 727-937-8834
> NASFT 30210
> 
> K3  #1605
> W9DVM
> 
> 
>  
> 
> 
> 
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