[bars] CW KEY

[KC1SOZ]

Using DTR/RTS is one of the ways to signal, but the Key input of a radio is
not driven by voltage, but rather by conducticity. A CW key just closes the
circuit. The advantage of using DTR/RTS to communicate the intent to key is
that it is ready to program. Good point.

On Sun, Jun 4, 2023, 12:48 AM Jwahar Bammi <jbammi at mac.com> wrote:

> Hi Juan
>
> You can use DTR or RTS keying. For instance, Fdigi can be used on your PC
> to drive the selected serial port (or USB which in turns drives a USB to
> serial interface) that toggles the DTR or RTS  line, that you attach to
> your radios key input. You configure Fdigi to do CW keying via DTR/RTS can
> then put Fldigi in CW mode and type on your keyboard and it will toggle DTR
> or RTS  appropriately. The timing is controlled by the WPM setting in your
> Fldigi configuration.
>
>
>
> I am sure there are other programs that do the same or you can right your
> own to drive DTR/RTS
>
>
>
> 73 de k1jbd
>
> Bammi
>
>
>
>
>
>
>
> *From:* bars <bars-bounces at w1hh.org> *On Behalf Of *KC1SOZ
> *Sent:* Saturday, June 3, 2023 10:29 PM
> *To:* w1hh <bars at w1hh.org>
> *Subject:* [bars] CW KEY
>
>
>
> Hi folks,
>
>
>
> I am trying to make sense out of something here. I want to send morse code
> with my computer. I see all kinds of doodads and contraptions, some simple,
> some too fancy and way overpriced. What I don't see is the obvious, a
> simple device with a relay or switch that doesn't need to switch any power.
> It just plugs into the CW key jack on my radio, closes the switch or relay
> for dots and dashes and obviates the need to interface audio, make any
> fancy cables that make me disconnect my mike, or have a switch box, etc. I
> don't need a PTT or audio-in interface, I simply need to plug in to the key
> input. The radio will do the rest. DM780 should be able to handle it the
> same it uses a serial port pin to PTT.
>
>
>
> Anyone seen anything like this?
>
>
>
> 73,
>
> KC1SOZ
>
> Juan
>
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