[Elecraft] K2 Amp keying question

[Christoph Rheker]

Hallo Steve,

Thanks for the tip!

I was searching for this option and couldnt find it.. until I found
out I need Firmware 2.0 which I dont have since my K2
is #2143 and has older firmware ..-))

73, Chris DL4YAO


----- Original Message -----
From: "Steve Knell" <stevek@camelcom.com>
To: "Christoph Rheker" <DL4YAO@web.de>
Cc: <elecraft@mailman.qth.net>
Sent: Sunday, September 22, 2002 11:41 PM
Subject: Re: [Elecraft] K2 Amp keying question


> Hi Chris
>
> I had a similar "problem" with QSK switching of my amplifier.
>
> This is what I did to fix it:
>
>     Hit "MENU"
>     Scroll to "t-r"
>     Hold down MENU to EDIT the t-r number
>     Hit "DISPLAY" to toggle from "8r nor" to "8r hold"
>
> "8r hold" is the setting I used and the amp keying was fine.
>
> Good luck
>
> 73
> Steve G0CKP
>
> ----- Original Message -----
> From: Christoph Rheker <DL4YAO@web.de>
> To: <elecraft@mailman.qth.net>
> Sent: Sunday, September 22, 2002 10:00 PM
> Subject: [Elecraft] K2 Amp keying question
>
>
> > Hallo fellow kit builders,
> >
> > I have a problem keying my Amp with the K2 in CW mode.
> >
> > I am using a circuit similar to the one described on the
> > elecraft web pages.
> >
> > The signal I am using is "8R" as described because the
> > web page says:
> >
> > "We used 8R because it transitions from 8V to 0V about 15-20ms
> > before the K2 TX turns on."
> >
> > Sooo... here is the issue:
> >
> > The "8R" signal is 8 Volts during TX and goes to 0 Volts during
> > RX.. that's what I thought...
> >
> > But instead "8R" is 0 Volts only when actually the TX is keyed.
> >
> > For example:
> >
> > Via the menu I set the T-R delay to 0.5 secs. I sent a single
> > "DIT", the letter "E".
> >
> > I would expect that the "8R" signal goes down to 0 Volts for
> > the time "DIT" is sent plus 0.5 secs. But it is at 0 Volts
> > only for the time the "DIT" is transmitted. No delay at all.
> >
> > This is a problem because my Amp is a non-QSK type and it doesnt
> > like the fast switching.
> >
> > I am looking for a way to key my Amp while I am on TX including
> > the time defined in the T-R menu.
> >
> > I have looked at the diagram but am unsure what to do next.
> >
> > Any idea will be welcomed.
> >
> > Thanks and regards from Munich (Oktoberfest City for the next 2 weeks
..))
> >
> > 73 de Chris, DL4YAO
> >
>