[Amps] *** PGXL Questions on CW Operation

[Jim Thomson]

Date: Wed, 31 Oct 2018 19:41:07 +0000
From: Manfred Mornhinweg <manfred at ludens.cl>
To: amps at contesting.com
Subject: Re: [Amps] Fwd: Fwd: *** PGXL Questions on CW Operation

<A comment about this reply: This time delay implemented in SDRs will 
certainly cause the station's transmission to get out without any 
missing or shortened dits - but more time-delayed than the transmission 
of a non-SDR. When trying to break in, your transmission will always 
come late. When briefly switching to RX between dits, even if the radio 
hears anything it will get through to the speaker much delayed, making 
QSK less practical, or perhaps not practical at all. How is that, QSK 
operators? When you listen between dits, is it OK to hear what was sent 
by the other station a few dits ago, or does it have to be current?

The SDR might actually put the received signal on top of what you are 
transmitting, in your headphones.

In my opinion, QSK and SDR don't go together very well. Good QSK is 
easier to implement in conventional radios.

<Manfred

##  Manfred,  I think the idea  with QSK is to get just enough of the other fellows 
transmissions, delayed or otherwise,  so that you know you are  ...doubling  with him. 

##  With plane  VOX  CW,   and say a 300-400 msec VOX  delay..and   VOX  CW  used at 
both ends of the circuit,  both ops could  easily be transmitting at the same time, and not know it. 
So even if the  fastest  qsk setup  you could achieve  was a paltry 20-30 msecs,  that would still 
be fast enough to alleviate..doubling with the other fellow... regardless of whether the other fellow had 
qsk or not. 

Jim   VE7RF  
txing