I think there could be more than just clean contacts involved. As I
mentioned, on my old cootie style key, whose contacts have a mirror
finish, when the contact gap is set too wide the keying will be erratic
on the K3; no doubt due to my particular sending style combined with the
relatively "hard" action of the key. When a smaller contact gap is used
the keying is fine.
I have no idea how key contact de-bouncing is accomplished in modern
rigs. I assume there is some coding in the software in addition to
whatever electronic components are used. I am wondering if it would be
worthwhile for a modern rig (K4?) to make the parameters in the debounce
routine available as a user option in the software so it could be
tailored to individual keys...
73,
Drew
AF2Z
On 10/15/20 10:04, CUTTER DAVID via Elecraft wrote:
Sliding off topic a little: in designing some outdoor industrial control
equipment I was required to use some chunky, robust push buttons that were good
for high voltage, high current but no good at 12V. Getting to logic level I had
to build in a lot of extra current from 12V to ensure a good switch over, I
think some 30mA or so.
Using a favourite pre-war Morse key on vintage valve gear, it worked perfectly,
but on modern solid state equipment it was very intermittent and I didn't want
to make an interface. Solution, clean the contacts. Conclusion: modern gear
needs better contacts than the old stuff.
David G3UNA/G6CP
On 15 October 2020 at 15:19 dl2ki <[email protected] mailto:[email protected] > wrote:
Hi,
i posted the article here for discussion, because I can't judge it myself.
I think that Elecraft had a little idea to design the keyer electronics of
the K3 as it is.
Interesting is the difference to the K2, where the resistors R1 and R2 were
changed in revision "B". Again I can't judge if this had anything to do
with
this topic.
OK, I'll just leave it like this. Maybe somebody will have some experience
with it after all.
Thanks a lot
Wolfgang, DL2KI
--
Sent from: http://elecraft.365791.n2.nabble.com/
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