[KX3] External Key Timing Measurements

[John Oppenheimer]

Unlike the K3 and K2, the KX3 has unequal external key on and off
delays. If using an external keyer, an 8 ms Keying Compensation will
adjust for correct key timing.

Example scope shots using a CMOS-4 keyer are here:
http://www.kn5l.net/KX3/kx3-external-key-timing.html

John KN5L
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[Andrew Moore-3]

Thanks John - I've been hoping to find some analysis of KX3 CW timing. Do
you know if the on/off delay differences are constant across keying speeds?
Have you looked at timing when using the built-in paddle?

I prefer using the KX3 in its QRP / built-in paddle configuration and don't
expect (or need) K3-like performance and accuracy from it, but I'm curious.

73,
--Andrew, NV1B
maineware.net
..


On Sat, Nov 10, 2012 at 8:37 AM, John Oppenheimer <[hidden email]> wrote:

> Unlike the K3 and K2, the KX3 has unequal external key on and off
> delays. If using an external keyer, an 8 ms Keying Compensation will
> adjust for correct key timing.
>
> Example scope shots using a CMOS-4 keyer are here:
> http://www.kn5l.net/KX3/kx3-external-key-timing.html
>
>
>
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[John Oppenheimer]

Hi Andrew,

On 11/10/2012 08:14 AM, Andrew Moore wrote:
> Thanks John - I've been hoping to find some analysis of KX3 CW timing. Do
> you know if the on/off delay differences are constant across keying speeds?

I have updated the page with a 30 WPM scope shot. Yes, the delay remains
constant.

http://www.kn5l.net/KX3/kx3-external-key-timing.html

> Have you looked at timing when using the built-in paddle?

I posted the KX3 internal keyer measurements earlier this morning.
Summary; the internal keyer needs to be set to a Weight of 1.20 for a
1:1 sending Weight.

http://www.kn5l.net/KX3/kx3-weight.html

John KN5L
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