K1 Keyer Problem...

[M0RLM]

Dear All,

I am finding a problem with the keyer on my K1 that I just finished building.
Sometimes when I press dot I get dash-dot (-.) instead (even if I never
pressed dash before at all). Changing between A and B modes doesn't help.
Did anyone got the same problem or has any idea of what is going on? Many
thanks in advance.

73,
Rui - M0RLM

[Jim Younce]

Rui:

Check to make sure your keyer paddle contacts are cleaned and making a low
resistance contact when closed.  The Keyer circuit in the K1 generates dots
and dashes by connecting two different values resistors to ground.  The
voltage drop determines whether it is a dot or dash.  Burnish the keyer
contacts and I feel sure the problem will go away.

Jim Younce K4ZM
K2  SN:18
K2 Field Tester

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[M0RLM]

Dear Jim and Leigh,

Thank you very much for your fast and helpful replies! As you said the problem was with the paddle. After cleaning it and adjusting its tension, the problem faded away. I never had this problem with my usual keyer, and hence thought it could be something with the K1 MCU. Thank you once more! :D

73,
Rui - M0RLM

[David Pratt-2]

In a recent message, M0RLM <[hidden email]> wrote ...
>I am finding a problem with the keyer on my K1 that I just finished
>building.
>Sometimes when I press dot I get dash-dot (-.) instead (even if I never
>pressed dash before at all).

Rui -
That sounds as though it could be RF getting into the keying circuits.
Are you using and end-fed wire antenna?  Do you get the problem when
running lower power or when sending in Test mode?

73
--
David G4DMP/G3KEP
Leeds, UK
------


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