[CQ-Contest] CW equipment question

Kenneth E. Harker kharker at cs.utexas.edu
Thu Apr 22 15:11:24 EDT 1999

I wrote some time back:

>    I've recently acquired a new radio for the N5XU VHF contest
> station.  Unlike our other radios, this one requires manually 
> toggling the PTT line while sending CW.
>     We use a Super CMOS Keyer III for the VHF radios.  I think
> it would be great if I could have the keyer handle a PTT line 
> in addition to the keying line, much like TR Log can do from a
> parallel port CW interface.  The Super CMOS Keyer III does not 
> do this currently.
>    Does anyone have ideas/sources for a circuit I could add to
> the keyer to do this?

Dale KG5U sent me a simple circuit description to do exactly what
I wanted.  I  wired it up on a little corner of perfboard, and 
added it to the keyer.  It works great.  If anyone would like 
the details, let me know.

Kenneth E. Harker      "Vox Clamantis in Deserto"      kharker at cs.utexas.edu
University of Texas at Austin                  Amateur Radio Callsign: KM5FA
Department of the Computer Sciences         President, UT Amateur Radio Club
Taylor Hall TAY 2.124               Maintainer of the Linux Laptop Home Page
Austin, TX 78712-1188 USA            http://www.cs.utexas.edu/users/kharker/

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