[Elecraft] Keying question

[Jim Brown]

Are you talking about keying from WriteLog on the DTR line?  If so, you need a 
simple NPN transistor as an inverter between the computer and the K2 key jack. 
I've built several using 2N4123's that I happen to have in my junk box, but any 
small signal NPN will do. Collector to the key line, emitter to common, drive the 
base through 1K ohms from the DTR line.  Works on my K2, Omni V, TS850, and 
TS790A. 

Jim

On Wed, 23 Jun 2004 11:17:32 -0000, Robert McGwier wrote:

>Never mind.  RTFM.  Level shifting required.
>
>Bob
>
>
>-----Original Message-----
>From: elecraft-bounces at mailman.qth.net
>[mailto:elecraft-bounces at mailman.qth.net]On Behalf Of Robert McGwier
>Sent: Wednesday, June 23, 2004 9:35 AM
>To: Elecraft Mail
>Subject: [Elecraft] Keying question
>
>
>Is there any special interface at all needed to key the K2 from the COM port
>or can this be done directly?
>
>Bob
>N4HY
>
>
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