At 11:18 PM 6/18/01 +0100, k7qq@juno.com wrote:
>I just discovered that the cable I use for CW Keying my FD Radio has
>disappeared. I have found the CKT for CW keying but need the connections
>to make NA use the paddle to send also.
>
>ANYONE with the digram for a serial Port keying interface PLEASE send to
>k7qq@yahoo.com as an attachment. Juno won't take attachments for
>me.
Unfortunately, my schematic capture program is DOS-based and I can't find a
way to convert the output into something modern. However, for what Rex
needs, a text description will do:
DB9 DB25
dot 8 5
dash 6 6
pullup 7 4
ground 5 7
Connect the dot paddle to the pins shown above; paddle common goes to
ground. Also connect a 10K resistor from the dot and dash inputs to the
"pullup" pin shown above.
For the record, the CW keying output is pine 4 on a DB9 and 20 on a DB25,
with the shield connected to ground (as shown above). You can't use NA's
PTT output on a COM port with paddles unless you can provide your own
pullup voltage (a 9V battery would do). Then the PTT output is on the pin
marked "pullup".
That's all there is to it.
Dave Pruett, K8CC
DATOM Engineering
datom@contesting.com
http://www.datomonline.com
--
CQ-Contest on WWW: http://lists.contesting.com/_cq-contest/
Administrative requests: cq-contest-REQUEST@contesting.com
|