[Elecraft] Adding a (second) straight key jack to the K1?

Sun Jan 6 14:33:01 2002

Mike,

Your understanding of my goal is correct. Certainly it would be difficult to
manipulate the controller to have it switch between modes as necessary. What
I was really thinking of was *bypassing* the controller with the second
straight-key jack, accessing the keying circuit directly. Generally, all it
takes is to ground the right line in order to key the rig. So I guess my
real question is "is there easy access to the keying circuit?".

Thanks for all the comments & ideas thus far.

73 de Dave NK0E

----- Original Message -----
From: "Mike" <[email protected]>
To: "Dave Ek" <[email protected]>
Cc: <[email protected]>
Sent: Sunday, January 06, 2002 12:12 PM
Subject: Re: [Elecraft] Adding a (second) straight key jack to the K1?

>
> If I understand you properly, it sounds like you need the K1 to key in
> *straight key mode* through your added jack, AND in *iambic mode*
> through the standard jack.  Since the main MPU in the K1 actually
> controls the keying, you'll have some significant problems.  A menu item
> (INP) is used to tell the K1 MPU what type of keying device is connected
> to the key jack (HANDKEY/PADDLE-NORMAL/PADDLE-REVERSE).  You would have
> to somehow change the input modes depending on whether the PDA or the
> paddle is keying.  I don't think you'll be able to do this easily.
>
> You could set the K1 for paddle input, then re-write your PDA software
> and outputs to key two lines (DOT/DASH) like a paddle would generate,
> but I suspect the only simple solution will be to set the K1 for
> straight key mode and use a small EXTERNAL iambic keyer in parallel with
> your PDA output (through a Y-cable) to key the K1.  Of course the really
> simple solution would be to use a straight key instead of a paddle for
> the manual keying.
>
> 73,
> Mike / KK5F
>