[CQ-Contest] CQWW 10 minutes M/S rule

[Kenneth E. Harker]

David,

    Without a time-limit or a band-change restriction, it would be 
effectively impossible for a log checker to distinguish between a 
multi-single and a multi-multi station.  The station could operate 
multi-multi, submit their log as multi-single, and if questioned 
by the log checkers argue that their one radio (ahem) just changes 
bands really, really quickly.  

    The rule is to make sure that real multi-single stations are
not having to compete against stations that are behaving like 
multi-multi stations.


On Wed, Oct 29, 2008 at 01:45:30PM -0400, David Wilburn wrote:
> I'm new to contesting, can someone help me understand the point of a 
> 10 minute rule?  I don't quite see why it makes a difference if a 
> station that has multiple operators, but only one transmitter can only 
> switch bands at certain times.
> 
> Because of the second rule, it is implied that they are actually using 
> two transmitters, but only one can transmit at a time.  But it seems 
> like the second rule says the two transmitters each have their own timers.
> 
> Ok, I'm just getting more confused.  I am trying to understand how the 
> pieces fit together.  My wife and middle son are Techs, and I wanted 
> to do a M/S at some point.  Just trying to understand the point of the 
> rule.
> 
> David Wilburn
> NM4M
> 
> 
> 
> 
> kr2q at optimum.net wrote:
> > The CQWW DX Rule:
> > Single Transmitter (MS): Only one transmitter and one band permitted during
> > any 10-minute period.
> > Exception: One—and only one—other band may be used during any 10-minute period if—and
> > only if—the station worked is a new multiplier. Ten-minute periods are defined as starting with
> > the first logged QSO on a band.
> > 
> > So if - "1st QSO on 160m logged at 03.12," you count how many minutes you must be on 
> > the band:
> > 
> > 0312 = 1
> > 0313 = 2
> > 0314 = 3
> > 0315 = 4
> > 0316 = 5
> > 0317 = 6
> > 0318 = 7
> > 0319 = 8
> > 0320 = 9
> > 0321 = 10
> > 
> > You may initiate a "new band" QSO after the 10 minute duration.  Your "required" time 
> > on 160  (in your example) ends when minute 0321 is completed.  Therefore, you may 
> > QSY to another band an initiate another QSO starting at 0322.  Then you have stay 
> > on that "new" band for a DURATION of at least 10 minutes.
> > 
> > PLEASE NOTE that the clock STARTS with the FIRST QSO.  So if you QSY'ed at 0322, but did
> > not make a QSO until 0325, then you must STAY on the "new" band through and including
> > minute 0334.  In this example, your next "different band" QSO cannot start until 0335.
> > 
> > Finally, please note that there are two separate 10 minute rules: one for the runner and one
> > for the multiplier station.  And, of course, you may stay on the band (runner or multiplier or both)
> > for MORE than 10 minutes duration if you want to.
> > 
> > Hope this helps,
> > de Doug KR2Q
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> 
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-- 
Kenneth E. Harker WM5R
kenharker at kenharker.com
http://www.kenharker.com/