see here:
http://ka7oei.blogspot.com/2013/03/getting-atomic-wwvb-clocks-to-work.html

73
KJ6UHN
Alex

On 11/10/2016 4:18 AM, Peter Reilley wrote:

Yes,  there are projects that will generate the relevant signals but you
have to be absolutely certain  that the signal will not 'leak'  and affect
clocks you don't own.

Which may not be as easy as it sounds,  it's amazing just how far a couple
of milli watts of RF can travel.

On 10 Nov 2016 12:21, "Peter Reilley" preilley_454@comcast.net wrote:

I should also have added,  it may be better to work out a repeater scheme
where an externally mounted antenna re-radiates the received signal inside
your home.

On 10 Nov 2016 12:21, "Peter Reilley" preilley_454@comcast.net wrote:

On Thu, 10 Nov 2016 07:18:42 -0500
Peter Reilley preilley_454@comcast.net wrote:

There are many of those. Just google for WWVB simulator.
Interestingly, there seem more DCF77 simulators out there than
WWVB ones.

As Clint wrote, be carefull not to emit too much. Transmit only
as much power that your clocks can just barely receive it.
Which probably means not to connect any wire at all.

60kHz is low enough that it will pass through all but steel reinforced
concrete like through air and thus you will probably jam all sourounding
houses/clocks as well.

The same is also true for repeaters, btw.

			Attila Kinali

--
It is upon moral qualities that a society is ultimately founded. All
the prosperity and technological sophistication in the world is of no
use without that foundation.
-- Miss Matheson, The Diamond Age, Neil Stephenson

Found it.

There was an article by Andy Flind in a UK electronics magazine,  EPE
December 2001 which detailed an MSF repeater to overcome a problem with
60KHz time signal reception.

Shouldnt be bothered by the signal format as I remember it being a very
simple design.

As others have pointed out,  even re radiating the original signal may
cause problems so take care.

On 10 Nov 2016 13:15, "Attila Kinali" attila@kinali.ch wrote:

Pete,

There's lots of examples of this in the archives. It's quite easy to do.

You can sometimes find someone who has done all the work for you. For example:

http://unusualelectronics.co.uk/product/chronvertor-module

http://unusualelectronics.co.uk/ebay/manuals/Chronvertor_User_Manual_v2.1.pdf

/tvb

Peter wrote:

Some on the list have, and I'm sure they will provide the details.

Others have mentioned the potential problems with interference to other
WWVB users.  For starters, make sure you study and understand Part 15 of
the FCC rules before you put it on the air, or you could face a nasty
enforcement action.  (Even if you are Part 15-compliant, you may still
screw up other users' reception and get a visit from the FCC when they
complain.  I operate several very sensitive 60kHz receivers -- if you
live in my neighborhood, I'm almost certain to be unhappy about anything
you deploy.)

Note that the problem with most "atomic" clocks that I've seen is
actually not insufficient signal (in the wee hours of the morning, when
they try to synch).  It is either excessive QRM, or orienting the clock
so its antenna has a null toward Fort Collins.  Make sure the antenna
has a major lobe toward Fort Collins (this may require relocating the
entire clock or bringing the antenna out so you can orient it
independently), and that it is well clear of the AC mains distribution
wiring in your house and any other sources of QRM (wall warts, CFL
lamps, LED lamps, etc. (this may also require relocating the clock).

The typical clock using a loopstick antenna has lobes to the front and
rear, and nulls to the sides.  Thus, mounting the clock on the western
exterior wall (for users on the east coast) is usually best.  Putting it
directly in front of a west-facing window may help.

Best regards,

Charles

I heartily second Charles' admonition regarding FCC PART 15 unlicensed
transmissions. Part 15 explicitly states that an unlicensed operator may
not cause interference with any licensed transmission. Because of the
specific purpose of WWV/WWVB transmissions, any discernible leakage
detectable by any other user is prima facie evidence of unlawful
transmission and subject to a heavy fine. I assure you that any licensed
Part 97 user who detects your emissions over the top of WWVB is quite
likely to rat you out to Uncle Charlie. And should, may I say, because you
will be interfering with a public service. "I am just syncing my clocks" is
not going to impress the guys who appear in your driveway in a white van
with RDF antennas on the roof.

So....be very damned sure that you are not radiating a discernible signal
outside of the immediate vicinity of your clocks.

Bill
KJ4SLP

On Thursday, November 10, 2016, Charles Steinmetz csteinmetz@yandex.com
wrote:

--
If you gaze long into an abyss, your coffee will get cold.

And how about that many, many "radiator" which are moving up and down
with their carriers and don't give a damn about FCC Part 15 and
radiating radiating day and night with substantial power, I meant that
FFC approved and not approved switching mode power supplies, of which
every household has a hand full of it?

73
KJ6UHN
Alex

On 11/10/2016 9:22 AM, William H. Fite wrote: