Alun L. Palmer wrote:
wrote in
This is because the US hams have to transmit in the BC band. If the US hams
could transmit outside the broadcast frequencies this wouldn't continue.
The DX works split so that their sigs aren't covered by BC QRM.
The 40M phone DX in region 2 more often than not works split anyway
even though it's legal for them to transceive. They do it simply to
keep themselves from getting buried under their own pileups. The "DX
windows" on 75 and 20 phone are both well within the U.S.phone bands
but the DX still habitually listens up for for calls from both U.S. and
other DX for the same reason. Including the DX in the other regions.
It also works the other way around. Given the choice U.S. dxers
generally prefer working split so that they can hear the DX below the
hordes calling him/her. This is particularly true on 160/75/40 where
the DX is often down near the noise level. And I can't count the number
of new ones I've logged with split CW by "transmitting up".
73 de Alun, N3KIP
w3rv