[Elecraft] K3: new to wish-list - KEY OUT setting in menu (to be more like PTT OUT) for CW PTT mode

[Vic K2VCO]

Ken_ke2n wrote:
> 
> The KEY OUT switch (FET) is from the inverted state of the main receive
> control line.
> 
> So your amplifiers and transverters (etc) are keyed up whenever you are
> **not receiving**
> - which is not quite the same thing as transmitting (!)
> 
> So when you program the keyer messages it turns on this output.
> When you load a new MCU program in, it will key up your equipment for 3 
> minutes continuously (I will not do that one again !)
> 
> Anyway, I think a wiring change is required for this one. It would be easy
> to change the logic to be:
> 
> not_receive AND transmit

I would be very careful about this, because of the need for the key out 
to be activated a few ms. before RF appears and to stay active until 
after the RF is gone. This is necessary to prevent hot-switching of 
amplifier relays which at best will create key clicks and at worst will 
destroy the relays.
-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco