[CQ-Contest] Split operation in CQ WW CW

Vladimir Sidarau vs_otw at rogers.com
Mon Aug 27 16:37:04 EDT 2012

In the CQ WW CW last year I was priviliged by a double mukt provided by a 
ZK2. When a pileup on a simplex freq turned into a mess, the operator 
decided to listen UP. It has helped not only himself, but also hundreds of 
callers. His signal was S3-S5 but readable when clear, but the QRM was S9+20 
or higher. Therefore all the hundreds of ZK2 QSOs turned to be possible at 
all only when the split started.

Besides, if memory serves, the CW subband extends from 28.000 to 29.700 
worldwide. Other bands are not that rich but still OK. It means, there is 
some space for split operation sometimes, whan it is really necessary.

In the meantime I recall some Central American stations running NA using 
split. That is totally unacceptable.

Vladimir VE3IAE


----- Original Message ----- 
From: "Radio K0HB" <kzerohb at gmail.com>
To: "Tom W8JI" <w8ji at w8ji.com>; "Pete Smith N4ZR" <n4zr at contesting.com>; 
<cq-contest at contesting.com>
Sent: Monday, August 27, 2012 3:17 PM
Subject: Re: [CQ-Contest] Split operation in CQ WW CW

> I'm lost on this one, guys.
> Why should a station (just because they're low power, or DX) be privileged
> above us "commoners" to a second QRG for clear reception?
> Good luck on this one now!
> 73, Hans, K0HB
> -----Original Message----- 
> From: Tom W8JI
> Sent: Monday, August 27, 2012 4:57 PM
> To: Pete Smith N4ZR ; cq-contest at contesting.com
> Subject: Re: [CQ-Contest] Split operation in CQ WW CW
>> the ruck without anyone having to send "up one" or whatever.  I'm sure
>> Bob was talking about the up 5 splits, not something within 300 Hz or so.
> What is the difference in spectrum used if the pile is 500 Hz up, or 5000 
> Hz
> up?
> The spectrum used is dependent on the bandwidth of the signals and the
> spread around a second frequency, not how far away the second frequency
> is.......once it does not overlap the TX channel width.
> There might be a logical reason I'm missing. I'm trying to understand the
> "ruckus" about a 5 kHz split wasting space, when the same exact space is
> used with a 2 kHz split or a 1 kHz split.
> If the split is 5 kHz and the stations using that split have emission
> confined within 500 Hz, they use an extra 500 Hz over single frequency. If
> the split is 1 kHz, they still use an extra 500 Hz.  The use is at a
> different spot, but still extracts exactly the same total spectrum from
> other use.
> If someone is at 7.005 and working simplex and most people have all
> emissions within 500 Hz of width (+ - 250 Hz) they use 500 Hz from 7.00475
> to 7.00525 kHz. If they listen up 500 Hz, they simply move that 500 Hz 
> slice
> up the band from 7.00525 to 7.00575 kHz.
> If they move it 5 kHz or 100 kHz up the band, they still "hog" the same
> total space.
> I'm trying to figure out what people are trying to say, because it has
> nothing to do with the split distance once it is all outside the one
> transmit channel width.
> 73 Tom
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