On Jul 25, 8:41Â*pm, American Insurgent wrote:
On Jul 24, 11:31 pm, RHF wrote:





On Jul 24, 8:24 pm, American Insurgent wrote:

On Jul 24, 10:24 am, msg wrote:

Steve wrote:
Just curious about whether anyone ever hears this time signal. I've
listened for it without success. It appears to be active.

Website:http://www.roa.es/

"Transmisión de señales horarias en HF, durante dos periodos de 25
minutos diarios, en 15006 y 4998 KHz. Respectivamente, entre 10:00 y
11:00 horas UTC."

My (no doubt weak) translation, courtesy of babelfish: Â*Transmission
of hour signals in HF, during two periods of 25 minutes daily, in
15006 and 4998 KHz. Respectively, between 10:00 and 11:00 hours UTC.

Â*From your posting IP I suspect that you are in NYC. Â*Does anyone
have any reason to believe that these signals separated from WWV
by only 4 and 2 kHz respectively could ever be resolved in NYC?

Perhaps European readers have copied those signals; also under
remarkable propagation conditions it is conceivable that they could
mix with WWV in the States, much like WWVH is often mixed with
WWV here in the Northern Midwest (the female voice from WWVH
always speaks during silence of the male voice from WWV).

Regards,

Michael

Regards,

Michael

Most time signals outside the US are within a few khz of 5, 10, and 15
Mhz, because there's a narrow band around those freqs that is
allocated for time signals. (There are also allocations for 2.5, 20,
and 25 Mhz, but they are rarely used. NIST canned its 20 Mhz outlet
years ago.) Most of the foreign services try to avoid competing
directly with WWV/WWVH, except Venezuela, which has a time service
that directly competes with WWV. (Hugo Chavez loves to tweak the nose
of the US any way he can.) Increasing numbers of foreign time services
have been shelved for good in the last decade due to aging equipment
and lack of funding. The Soviets, then the Russians, had a time
station that is likely no longer active. VNG is gone, which outraged
Australian owners of radio controlled clocks that used VNG's VLF time
signal. There were services in Chile and a few other places that have
disappeared. Only England, Germany, Japan, and the US maintain VLF
time signals. The main HF signals are in the US, Canada, and
Venezuela.- Hide quoted text -

- Show quoted text -

Current Shortwave Radio [HF] Time Signal Stations :
BPM · CHU · RWM · WWV · WWVH · YVTOhttp://en.wikipedia.org/wiki/Radio_clock
Defunct {Non-Operating} : OMA · VNG

Standard Time and Frequency Transmissionshttp://www.npl.co.uk/time/measurement_time/time_trans.html

Time Signal Shortwave Radio Stationshttp://www.shortwave.be/tim.html

~ RHF
Â*.
Â*.
. .
From Wiki:

Terrestrial time signals

Radio clocks synchronized to terrestrial time signals can usually
achieve an accuracy of around 1 millisecond relative to the time
standard, generally limited by uncertainties and variability in radio
propagation.

Time signals that can be used as references for radio clocks include

Â* Â* * U.S. NIST Broadcasts:
Â* Â* Â* Â* Â* o Longwave radio station WWVB at 60 kHz (binary coded
decimal only) at 50 kW,
Â* Â* Â* Â* Â* o Shortwave radio station WWV (a male voice, Fort Collins,
Colorado, about 100 km north of Denver at approximately 40°40′49″N,
105°02′27″W ) at 2.5, 5, 10, 15 and 20 MHz at 2.5 kW to 10 kW,
Â* Â* Â* Â* Â* o Shortwave radio station WWVH (a female voice, on Kauai
near Kekaha, at about 21°59′16″N, 159°45′50″W) at 2.5, 5, 10, and 15
MHz at 2.5 kW to 10 kW.
Â* Â* * German Broadcasts: A time signal from DCF77 (Mainflingen, a
transmitter near Frankfurt at about 50°01′N, 9°00′E) can be received
on 77.5 kHz to a range of about 2000 km.
Â* Â* * Canadian Broadcasts: The official time can be obtained by tuning
to radio station CHU (Ottawa, Ontario) at 3.33, 7.335 and 14.67 MHz,
with FSK digital time data sent once per minute at 300 baud.
Â* Â* * UK Broadcasts: A time signal from MSF, an atomic clock near
Anthorn (which was relocated from Rugby on 2007-04-01) can be received
on 60 kHz.
Â* Â* * The JJY radio stations in Japan on 40/60 kHz.
Â* Â* * The BPM radio station in Xi'an, China at 2.5, 5, 10 and 15 MHz
Â* Â* * Swiss Broadcasts: The legal Swiss time can be picked up from the
HBG longwave transmitter in Prangins on 75 kHz. The time code is
compatible with that of the German DCF-77 transmitter.
Â* Â* * French Broadcasts: Station TDF transmits timecodes on 162 kHz
from a site near Allouis.
--------------

Only the Americans, Canadians, Chinese, and Venezuelans (YVTO, not
mentioned here) broadcast 24 hour time signals on SW. The US, UK, and
Japan all have 60 khz signals, probably using the same transmitting
equipment. The Germans and Swiss are slightly higher, around 75 khz
(probably different equipment). The French as usual are the oddballs,
hanging onto longwave.

Further down the Wiki article mentions RWM, which is/was the Soviet/
Russian station. RWM is probably erratic in operation due to old
equipment and power shortages. (Voice of Russia and Radio Ukraine are
also erratic for the same reason. I presume that those two broadcast
stations are using old Radio Moscow/Radio Kiev stuff. The smaller
Soviet satellite stations, such as Poland and Albania, are only on the
air occasionally if at all.)

I have a European market radio controlled clock that can be switched
between British and German signals. I have yet to see a mass market
radio controlled clock that uses Canadian signals.

- I find the Canadians hard to recieve here in California.

CHU Transmits on : 3330, 7335, and 14 670 kHz.
They use Upper Single Sideband USB with Carrier re-inserted.
http://inms-ienm.nrc-cnrc.gc.ca/time...adcasts_e.html
I can get 3330 kHz and 7335 kHz some times
but have never picked-up the 14670 kHz signal.

- China and Venezuela go head to head with WWV/WWVH,
- making them impossible to hear in America.

BPM - China Time Signal
http://en.wikipedia.org/wiki/BPM_(time_service)
http://www.meinberg.de/english/glossary/bpm.htm
http://www.time.ac.cn/jianjie/1.jpg
? Transmission Technical Data ?
USB ? LSB ? DSB ?
Carrier Suppression ? Carrier Re-Inserted

- I suppose that WWV is hard to hear
- outside North and Central America.

Especially if there is something local on the Frequency.

- WWVH probably bumps directly into the
- Chinese signals.

Yeah somewhere between Hawaii and China for sure.

I doubt that Venezuela has much competition.

Especially to the South.

World Wide HF Time & Frequency Standard Stations
http://www.smeter.net/stations/hf-time-frequency.php
S-METER = http://www.smeter.net/

~ RHF
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