[Elecraft] K3 - Maximum CW speed from manual key

[Charlie T]

I remember working at Microlog Inc (The OLD one in Gaithersburg MD that made RTTY/CW video terminals) in the 80's. 
No rigs at the time would function efficiently with on/off keying at that speed, so we were experimenting with 300 WPM CW sent using the normal RTTY method of 170Hz shift FSK.
It worked like a charm and our CW reader would copy perfectly at that speed too.
Just about everyone in the company was a ham from the pres. on down, so we played around with it on 2 meter FM using AFSK tones into the mike jack until something new came along.
Other than just to see if it WOULD work, nothing more was ever done with it.

73, Charlie k3ICH




-----Original Message-----
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On Behalf Of David Gilbert
Sent: Saturday, February 06, 2021 1:04 PM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3 - Maximum CW speed from manual key


I don't see that as being realistic.  Per the normal definition of a Morse "word" being the word "paris", 300 wpm means each dit would be no longer than 4 msec.  As best I can recall, the rise and fall of the K3 keying waveform are each around 2.5 msec.  I'm not at all an expert, but I suspect most digital signal processing techniques would find that hard to differentiate.

73,
Dave   AB7E





On 2/6/2021 8:01 AM, Kurt Theis wrote:
> Greetings list!
>
> I searched the archives and other sources, but haven't found an 
> answer, so I'll try here.
> I'm looking to find the maximum cw speed on my K3 (with new 
> oscillators, serial 8xxx) when using a manual cw key plugged into the 
> KEY jack on the back of the radio.
>
> I don't mean the internal keyer, or memories. I'm not using QSK, so 
> that won't be an issue. The K3 is put into TX mode via an external TX 
> switch, and keyed via the KEY jack.
>
> I'm hoping for speeds in excess of 300 WPM. Possible?
>

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