[Elecraft] Delay between key in, key out on XV

[Don Wilhelm]

John,

The 8R signal is asserted about 15 ms before the onset of RF - that may 
be OK for a fast sequencer, but is not for slow switchovers.

I have developed a circuit which will interrupt the K2 paddle inputs and 
the PTT input until a signal is received to indicate "OK to transmit 
now".  You can find the circuit on my website http://w3fpr.qrpradio.com 
- check the article related to CW PTT for the K2.  It works for both CW 
and SSB.

To use my circuit, you will need some input (pushbutton, foot-switch, 
etc) to start your sequencing steps, and the input to my circuit should 
be a final output from the sequencer.

I know of at least 2 VHF folks and 1 SO2R operator have used it with 
success, there may be more.

73,
Don W3FPR

John D'Ausilio wrote:
> I've been searching around and I can't seem to locate any information
> on whether and how much delay there is between key in (or 8R) and key
> out on the XV series transverters. I need an early PTT for my
> about-to-be-integrated outboard T/R relays .. I've got a external
> sequencer solution, but I got to thinking that if there's at least 50
> or 100 ms delay coming out of that I could get rid of the diode on the
> key in connector and use the 8R to fire a driver for the T/R relay.
> Anyone know?
>
>