[CQ-Contest] CQ and S&P on the same band

kr2q at optimum.net kr2q at optimum.net
Fri Jul 30 15:32:30 PDT 2010

Well, all you have to do is look at the CQWW on-line (public) logs and you will note lots of
guys have been doing just this, especially non-NA.  It's no big deal.

As for history, as others have stated, this was done ~35-40 years ago.  At N2AA/K2GL I
did this successfully on 10m with my own simple design.  We used a pair of TR7s (when that
was considered the "hot" radio).  One rig went to our 10 over 10 stack "up on the hill" while
the other radio could use a pair of phased 1/4 wave verticals, physically positioned for
minimal pickup from the yagi's when the yagis were pointed at Europe, which is where they
usually were, except for the JA openings (remember those on 10m?).  

Without any "extra" filters or slight of hand, we could listen without any issue at all within
5kc of our own xmit QRG.  And the verticals heard real well (just a simple 4 radial system for
each one).

We also had listener yagi "in the woods" on the other bands and I don't remember on what
other bands.  Not sure how well they worked, but I do know that the phased verticals were
killers for listening while transmitting.

de Doug KR2Q

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