Elecraft

CW keying

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Håkan Olsson-3

CW keying

So now I am about to put the KI02 RS-232 I/O Option into my K2.

Now I want to work CW from the computer using serial port
control line keying. That should be simple, but what
circuit/components are you guys using to do that?
Any links were I can read about it?

Please tell me so I don't mess things up at the very end of this
most wonderful building experience!

73 de
Håkan / SM6EQO
K2 #05810
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Joe-aa4nn

Re: CW keying

You can look at the pinout for LPT1 at
http://www.k1ea.com/hints/lpt.htm
Also look at the pictorial at http://www.n3fjp.com/ under CW-PC Interface.
de Joe, aa4nn

----- Original Message -----
From: "Håkan Olsson" <[hidden email]>
To: <[hidden email]>
Sent: Thursday, November 02, 2006 12:49 AM
Subject: [Elecraft] CW keying

> So now I am about to put the KI02 RS-232 I/O Option into my K2.
>
> Now I want to work CW from the computer using serial port
> control line keying. That should be simple, but what
> circuit/components are you guys using to do that?
> Any links were I can read about it?
>
> Please tell me so I don't mess things up at the very end of this
> most wonderful building experience!
>
> 73 de
> Håkan / SM6EQO
> K2 #05810
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>

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Håkan Olsson-3

Re: CW keying

Thanks Joe!

That's simple enough. Just about right for my level! :-)

Is there any reason in practice to use optic coupling versus direct keying?
I'm going to use it for a K2 and never ever going to upgrade to K2/100
or using an amplifier.

de Håkan

Joe-aa4nn wrote:
> You can look at the pinout for LPT1 at
> http://www.k1ea.com/hints/lpt.htm
> Also look at the pictorial at http://www.n3fjp.com/ under CW-PC
> Interface.
> de Joe, aa4nn
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Post to: [hidden email]
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Joe-aa4nn

Re: CW keying

Direct keying is perfect. I don't know any reason
to even consider optical coupling. Good luck.
73, Joe, aa4nn

----- Original Message -----
From: "Håkan Olsson" <[hidden email]>
To: <[hidden email]>
Sent: Thursday, November 02, 2006 1:37 AM
Subject: Re: [Elecraft] CW keying

> Thanks Joe!
>
> That's simple enough. Just about right for my level! :-)
>
> Is there any reason in practice to use optic coupling versus direct
> keying?
> I'm going to use it for a K2 and never ever going to upgrade to K2/100
> or using an amplifier.
>
> de Håkan
>
>
>
> Joe-aa4nn wrote:
>> You can look at the pinout for LPT1 at
>> http://www.k1ea.com/hints/lpt.htm
>> Also look at the pictorial at http://www.n3fjp.com/ under CW-PC
>> Interface.
>> de Joe, aa4nn
>

Don Wilhelm-3

RE: CW keying

In reply to this post by Håkan Olsson-3

The only reason to use optical coupling is to isolate the computer ground
from the K2 chassis (or use a fast relay to do the same thing).

If connecting the keyline from the computer to the K2 introduces additional
noise during receive, add the optical coupling.

73,
Don W3FPR

> -----Original Message-----
>
> Thanks Joe!
>
> That's simple enough. Just about right for my level! :-)
>
> Is there any reason in practice to use optic coupling versus
> direct keying?
> I'm going to use it for a K2 and never ever going to upgrade to K2/100
> or using an amplifier.
>
> de Håkan
>
>
>
> Joe-aa4nn wrote:
> > You can look at the pinout for LPT1 at
> > http://www.k1ea.com/hints/lpt.htm
> > Also look at the pictorial at http://www.n3fjp.com/ under CW-PC
> > Interface.
> > de Joe, aa4nn
>