[time-nuts] Nutty time-nuttery with WWVB

EWKehren at aol.com EWKehren at aol.com
Thu Nov 10 11:13:50 EST 2016

I lived till last year in Miami which is a s far away from  the 60 KHz  
transmitter. In the 90's Junghans came to test their 60 KHz products for  that 
reason and as long as I lived there in my concrete slab home with steel re  
enforcement I never had problems receiving 60 KHz on my multiple clocks, for 
my  Lab I used a ferrite bar. Two Junghans watches with wrist band antennas 
also  worked perfectly.
Bert Kehren
In a message dated 11/10/2016 11:05:25 A.M. Eastern Standard Time,  
csteinmetz at yandex.com writes:

Peter  wrote:

> Could I implement my own personal WWVB transmitter that  would
> be powerful enough to be picked up by the clocks in my  house?
>      *   *   *
> Has  anyone tried this?

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,


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