[Elecraft] Elecraft keyer chip replacement

[Klaus Koppendorfer]

Yes last contest i used winkeyer k1el and n1mm with correct settings on winkeyer cw sound good

Von: Matt VK2RQ [mailto:matt.vk2rq at gmail.com]
Gesendet: Donnerstag, 22. August 2013 09:37
An: Klaus Koppendorfer
Cc: Dick Dievendorff; #elecraft
Betreff: Re: AW: [Elecraft] Elecraft keyer chip replacement

Once I did a contest where the KX3 was keyed by N1MM logging software via serial port/simple transistor switch, and I found the CW sounded quite choppy. I replaced the transistor circuit with one of those K1EL winkeyer kits, and it still sounded choppy, but I had read an article on the web somewhere about switchover delays in the KX3. The author of that article recommended a particular value for the fixed delay compensation parameter in the Winkeyer, and when I configured that, the CW sounded FB.

It is quite possible that some tweaking of the internal keyer code in the KX3 could produce some improvements, but so far I haven't made any measurements myself to investigate this topic.

73,
Matt VK2RQ

On 22/08/2013, at 5:13 PM, Klaus Koppendorfer <KK at ccf.net<mailto:KK at ccf.net>> wrote:
Tnx Mat, yes i know this article – measurements are done with 20 wpm
With higher speeds it will become more worth !!

Von: Matt VK2RQ [mailto:matt.vk2rq at gmail.com]
Gesendet: Donnerstag, 22. August 2013 08:48
An: Klaus Koppendorfer
Cc: Dick Dievendorff; #elecraft
Betreff: Re: [Elecraft] Elecraft keyer chip replacement

This article may be of interest:
https://sites.google.com/a/ke7x.com/www/home/miscellaneous-k3-information/k3-and-kx3-cw-wgt

73,
Matt VK2RQ

On 22/08/2013, at 4:41 PM, Klaus Koppendorfer <KK at ccf.net<mailto:KK at ccf.net>> wrote:
Is there actualy a timing problem with kx3 cpu ??
Keying with 30wpm and more the dot-dash ratio is incorrect - very short dots like a machine gun :)
Compared to my k1, kx1,k2 and k3 the cw from internal keyer of kx3 is terrible

Dick, do you think there will be a solution in firmware soon ??

Vy73
Klaus
Oe6kyg


Elecraft does not use separate keyer chips.  Morse code generation is performed by the main microcontroller.

Dick, K6KR


Since I am interested in the Ultimatic mode and the Bug mode I have on my Pico keyer, can anyone tell me (I am mostly concerned with the KX1 and also the KX3 keyer chip):

1)
Do the Elecraft keyer chips have these modes?

2)
Is the Elecraft keyer keyer chip (drop-in) upgradable to a Pico Keyer chip?

David, k3tue
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