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“World Clock Insert” makes clock making a
breeze even for beginners. Sells for about $20.
(Courtesy Klockit)
the inside of the bottom half of the door glass
with black lacquer spray paint. When I use a
pendulum movement (mechanically or quartz
driven), I keep the glass clear to show the moving
pendulum. Now, with movement in place
I had only to attach the hardware to finish the
clock.
The most critical thing to using the atomic
clock movement is to follow the explicit directions
which come with the movement. Aligning
the movement and attaching the hands so that
the time is correct is essential. There is a locking
pin which comes with the unit which is used
to keep the movement from moving until the
clock is finished. Don’t lose the locking pin, as
you may need to remove the battery to transport
the clock and you’ll want the movement to
stay right where you left it. Just make sure the
locking pin is removed before you insert the
battery.
Of course, the original Shaker design
included a wooden hanger on the back so that
the clock could be hung on a Shaker peg. I
dispensed with the wooden hanger and instead
drilled a one inch diameter hole dead center
in the back so that the clock could hang as a
wall clock or sit on a shelf or mantle. Shaker
clock cases were usually painted and the faces
had only the hour hand. However, with their
penchant for perfection, I think they would
have loved the addition of the atomic clock
movement.
This movement may be used in any design.
You could use it with the one piece, two
piece or three piece designs mentioned earlier.
You can use it, for example, with an old radio
advertisement or other related memorabilia decoupaged
to the surface of a piece of plywood.
You’re limited only by your own imagination.
Time Signal Stations
Government funded and operated time signal
stations around the world provide a constant
time standard and serve as propagation beacons
to indicate how well (or poorly) the bands are
performing at any given moment. These stations
transmit in the multi-kilowatt range, 10
kW in the case of WWV, and if you can’t hear
them there’s little chance of hearing the low
power beacons or amateur radio operators.
An excellent list of time signal stations world
wide is found at http://www.ac6v.com/standard.htm.
Of interest in North America are
the following:
Freq
(kHz) Call sign Location
60 WWVB Fort Collins, CO
1510 HD2IOA Guayaquil, Ecuador
2500 WWV Fort Collins, CO
2500 WWVH Kekaha, Kauai Hawaii
3330 CHU Ottawa, Ontario Canada
3810 HD2IOA Guayaquil, Ecuador
5000 HD2IOA Guayaquil, Ecuador
5000 WWV Fort Collins, CO
5000 WWVH Kekaha, Kauai, Hawaii
7335 CHU Ottawa, Ontario Canada
7600 HD2IOA Guayaquil, Ecuador
10000 LOL Buenos Aires, Argentina
10000 WWV Fort Collins, CO
10000 WWVH Kekaha, Kauai, Hawaii
14670 CHU Ottawa, Ontario Canada
15000 LOL Buenos Aires, Argentina
15000 WWV Fort Collins, CO
15000 WWVH Kekaha, Kauai, Hawaii
20000 WWV Fort Collins, CO
The National Institute of Standards and
Technology has a fact sheet about radio
controlled clocks at:
h t t p : / / w w w. b o u l d e r. n i s t . g o v / t i m e -
f r e q / s t a t i o n s / r a d i o c l o c k s . h t m
RESOURCES
Mail Order Catalogs carrying radio related
clocks. Prices are as advertised; model numbers
are in parentheses.
Amateur Electronic Supply 800-558-0411
http://www.aesham.com
Carries numerous quartz digital analog and
LED, LCD displays including:
Jumbo display LCD 24 hour clock (118):
$24.99
DXer’s World Map Clock with LCD world map
(112B): $24.99
MFJ Dual quartz digital LCD display (108B):
$19.99
Grove Enterprises 800-438-8155 http://
www.grove-ent.com
Carries MFJ 12” 12 hour analog Atomic Wall
Clock (CLK01): $59.95 plus shipping
Universal Radio 800-431-3939 http://www.
universal-radio.com
Carries wide assortment of quartz analog and
digital clocks including:
MFJ analog quartz 12” 24 hour clock with day
of week and month dials (MFJ-125): $27.95
MFJ analog quartz 10” 24 hour clock (MFJ-
105C): $19.95
MFJ digital quartz 24 hour 5/8” numerals
((MFJ-107B): $9.95
MFJ digital Eternity Atomic Clock solar powered/WWV
controlled (MFJ-123): $74.95
Heartland America 800-229-2901 http://
www.heartlandamerica.com
Always a wide assortment of quartz movement
LCD and analog display clocks with and
without WWVB control. 12 hour movements
as low as $19.99
Clock Parts and Movements
Klockit 800-556-2548 http://www.klockit.com
Carries everything from grandfather clock kits
in cherry for $2,524.95 to 1 7/16” mini LCD
display inserts for $2.80 each. Issues new free
print catalog every month and has special discounted
items via web site and 800 number.
Also has line of analog/quartz clock inserts
and matching weather instruments (barometer,
thermometer, hygrometer).
WWVB’s 60 kHz antenna system cranks out 50 kW (ERP) from its 38 kW transmitter in Boulder,
CO. (Courtesy NIST)
Clockparts.com 800-421-4445 http://www.
clockparts.com
Offers an extensive free print catalog of
quartz movements and parts. Specializes in
replacement parts for clock repair. Carries
atomic clock movements, a large assortment
of weather instruments with matching clock
inserts and a few complete clock kits.
68 MONITORING TIMES January 2005