On the presumption of a worst case (for me) simplex receiver condition for the other station, them filtered down to 50 Hz; I use XIT to not be zero beat (which used to be expected once upon a time) with no greater than 25 Hz offset (stay within that 50 Hz filter).  Then one must only look (P3) at the station the DX is currently working to see if plus or minus 25 Hz should be used.

Then watch patterns, does the other station move the receiver at all, switch plus for minus... is there a pattern?  (Random, never is).  Paying attention to details means easier success rates.  ;-)

If split, use the same observations, but turn off XIT and use the other VFO for TX (allowing you to hear the station being worked as well).  EVERY operator has a pattern, humans are just wired for consistency.  Find it, predict it, make that contact.

73,
Rick NK7I dit dit

On 7/16/2020 9:27 PM, [email protected] wrote:
I use CWT to ensure that I do NOT zero beat the caller.  I want my signal to
be at a tone noticeably above or below that of everyone else (very important
to QRP op in a pileup). I haven't tried to quantify the hz/bar, I simply
tune to around 5 ticks away and it seems to work well.

Ken ke4rg

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