[Elecraft] K3 And WSJT-X FT8 Timing

[Edward R Cole]

Guess its time for me to add a couple comments:

Before FT8, before HFers "discovered" JT65,etc., we moonbouncer's had 
been using JT-65 for nearly 15 years!

Joe Taylor-K1JT invented all these nice new digital modes which 
originally were designed for ms (meteor scatter) and eme 
(moonbounce).  Knowing ms and eme stations run QRO on VHF+ with low 
noise preamps, there was a need to delay the digital transmission so 
all the various relays and accessories were switched to 
transmit.  Typically that was 300msec (0.3 seconds).  So the sw 
engages PTT and waits for everything to be ready before sending audio 
to the transmitter.

Now that "hot shot" HFers are wanting to "Hot switch" their gear a 
guess FT8 and WSJT-X versions have provided for user input on the 
delay length. <tongue in cheek - don't get upset>

Now you "know the rest of the story".

Note:
I use a USB/RS232 cable and key with DTR.  I couple audio input and 
output via two RS audio cables from my external soundcard (emu0202) 
to my 2010 K3 (4340).  I have computer generated audio turned off (no 
"you have mail" or internet beeps).  Besides, I have a separate 
computer for normal internet/e-mail, etc.  My dedicated ham radio 
computer is normally disconnected from internet and I keep computer 
time by use of a GPS dongle (I can restore internet for K3 fw upgrades).

73, Ed - KL7UW
   http://www.kl7uw.com
Dubus-NA Business mail:
   dubususa at gmail.com