Posted by
Geoffrey Mackenzie-Kennedy-2 on
URL: http://elecraft.85.s1.nabble.com/Ultimatic-Keying-tp374751p374762.html
One step away from a bug in that a string of dahs not just one dah comes out
when you hit and hold the dah paddle. There is a circuit in "Solid State
Design for the Radio Amateur" page 178 that I think does this using three
NE555 'timer' ICs, VERY simple, with a pot controlling speed. The Dah, Dit
and Spacing times can also be adjusted to suit the user's taste. The
authors were discussing applications of the NE555, not keyers as such. CMOS
ICs would keep the power draw low.
73,
Geoff.
GM4ESD
----- Original Message -----
From: "EricJ" <
[hidden email]>
To: "'Geoffrey Mackenzie-Kennedy'" <
[hidden email]>
Sent: Saturday, February 19, 2005 8:50 PM
Subject: RE: [Elecraft] Ultimatic Keying.
>
> Here's what I want. A keyer that generates dits when I push one paddle. It
> generates dahs when I push the other paddle. When I push the dits paddle
> while making dahs, I don't want it to do ANYTHING--I'm busy making dahs.
> Likewise, when I push the dahs paddle when making dits, I want it to keep
> making dits. Not dahs, not dah-dits. Dits for dits and dahs for dahs. Why
> has that been so much to ask of a keyer?
>
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