"c.foster" wrote in message ...
i was listening to these two frequencies but could not figure out who or
what they were for, so i was hoping you guys might be able to identify them
for me.

4540 khz at 00:12 utc on jan/11/04 it sounded like wwv with the time carrier
beeps but there was no voice saying at the tone it will be such and such a
time.

??

now the second frequency was 5550 mhz at 00:20 utc on jan/11/04 now it
sounded like a control tower for an airport. i don't think it was here in
toronto (pearson). they talked about "heavies" and allot of co-ordinates,
numbers and acronym's.
they also mentioned a back-up frequency of 3455 mhz.

Thats aviation. If you listen to the pilots when they call in, you can
usually tell which radio center it is. IE: New York Radio, San Juan,
Houston Radio,etc..
There are many in quite a few cities. A "heavy" usually means a
heavily loaded plane, full of people, full of fuel. IE: a fat loaded
747 might ID as United 247 "heavy" as an example. The co-ordinates are
waypoints or location fixes. You will hear many "sel-cal" checks. This
is a system used to ring a chime in the cockpit. That way they don't
have to listen to all the chatter in order to monitor for any calls to
them. They use a 4 letter designator, "IE: BFHE as an example" and
you hear a two tone transmission when they send it. IE:
beeeeeeeeeeep-booooooooooooop...They do checks to make sure it
actually goes off using the intended sel-cal. Air nav website sells a
sel-cal decoder and should have a demo. I've tried it. It works. I'm
listening to 5550 now... Just heard one transmission...Didn't catch
the ID, but the sound of the female controller sorta sounded like New
York radio....Not sure though...They also gave out 6.577 as a
freq...BTW, these HF radio "centers" differ from the VHF side. The VHF
"centers" are run by the gov, and are free. The "radios" you hear on
HF are privately owned co's. They charge the airlines for this
service. We have one hear in Houston. It's called Houston Universal
Radio. They have a website. Houston radio can be found on 6377,
10075,13330,17940, and I'm sure others...Many US cities have them. New
York, Miami, San fransico, San Juan, , etc, etc..Also, worldwide. MK