This is from Mike Agner (KA3JJZ) on RadioReference.com yesterday:
CHU 7 mhz freq to move Jan 1
From Raymond Pelletier, Glenn Hauser and the NASWA Yahoo group;
============================================
Frequency and Time
Institute for National Measurement Standards
National Research Council Canada
M-36, room 1026
1200 Montreal Road
Ottawa, Canada K1A 0R6
Tel: (613) 993-3430
Fax: (613) 952-1394
raymond.pelletier @ nrc-cnrc.gc.ca
Government of Canada
========================================
CHANGE YOUR SHORTWAVE RADIO DIAL
After seventy years of broadcasting Canada's official time, NRC's
shortwave station CHU will move the transmission frequency for the 7335 kHz
transmitter to 7850 kHz. The change will occur on 01 January 2009 at 0000
UTC.
CHU is a part of NRC's system for disseminating official time throughout
Canada, broadcasting 24 hours a day from a location approximately 20 km
south-west of Ottawa. Listeners hear tones to mark the seconds, voice to
announce the time in French and English, and digital data to set computers.
The atomic clocks at CHU are part of the ensemble of clocks in the time and
frequency research laboratories in Ottawa, at the National Research Council
Canada. The NRC clocks are used in conjunction with clocks in the time
laboratories of other countries to construct the internationally accepted
scale of time, UTC (Coordinated Universal Time), which is now the reference
for official time used by all countries. UTC is the modern implementation
of Greenwich Mean Time.
"Coincidentally, this frequency change comes at a time when NRC is
investing resources to refurbish the aging transmitters at CHU in order to
provide clear, dependable shortwave services as part of NRC's mandate to
disseminate time to all Canadians." said Ray Pelletier, Technical Officer
at the NRC-Institute for National Measurement Standards, who oversees the
CHU facility "The shortwave time service is especially beneficial for those
in remote locations where there is limited access to internet and telephone
communication. CHU also provides a back up against failure of other
services."
In April 2007, the International Telecommunications Union re-allocated the
7300-7350 KHz band from a fixed service to a broadcasting service. Since
then, interference on the 7335 KHz frequency has come from many information
broadcasters around the world.
CHU listeners in Canada and around the world who have for so long
considered the 7335 kHz frequency exclusively for time signals, are very
vocal about this interference. We have heard from amateur radio operators,
watchmakers, astronomers, and navigators who use the tones and voice
signals. As well, comments were received from those who use the carrier as
a calibration source at a distance for their equipment.
To give notice to users, CHU will broadcast an announcement in both
English and French. More information can be found at
http://www.nrc-cnrc.gc.ca/main_e.html and
http://www.nrc-cnrc.gc.ca/main_f.html
Comments about the CHU change can be sent by e-mail to
radio.chu@...
(Raymond Pelletier, CHU, DX LISTENING DIGEST)
As of Dec 9, nothing at above site about 7850. This NRC website also
mentions a leap second to be added at the end of 2008y:
http://time5.nrc.ca/timefreq/bulletin_tf-b.html (gh)
Monitored around 1430 UT Dec 9 on 7335, no announcements being heard yet
about the frequency change or the leap second.
And here`s another website with the history of CHU, etc.:
http://inms-ienm.nrc-cnrc.gc.ca/time_services/shortwave_broadcasts_e.html
(Glenn Hauser, DX LISTENING DIGEST)
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