On 9/1/2010 5:19 PM, raf3151019 wrote:
And the same common sense attitude which occurs in Canada is also
applied to the use of frequencies in the UK. There are sections of the
bands which are agreed internationally and everybody accepts it.
Although it rarely happens I don't agree with the ruling that
operators of Morse code are permitted to transmit where they please
anywhere on any band. Why ? Why should such a ruling still exist, for
what purpose, other than to irritate those using telephony ?
G0GQK
Mel, I suspect the reason is mostly historical, and because at one time,
when telephone just failed to communicate, and everyone understood
Morse, CW could get through. In fact, for VHF and UHF weak-signal
operation today, it is very common practice to switch between phone and
CW when signals are too weak to be understood by phone. I don't think
the ruling continues to exist in order to irritate phone operators...
Assuming that a phone operator can still decode Morse by ear, it is
possible to cross-communicate with phone and CW, but this is not
possible with modern digital modes, like PSK31 and Pactor to telephony
(PSK31 operators can understand phone, but the reverse is not true), so
there is no way to insure frequency sharing without legal separation
between phone and digital. F6CTE now has invented RSID, which helps
digital modes to cross-communicate with each other, and therefore
negotiate the use of a frequency, by making it easy to switch to
another's mode automatically. However, not everyone uses this capability
yet.
Of course, the importance of cross-communication is being able to ask if
a frequency is busy, or ask someone to move if it is.
73, Skip KH6TY
