[time-nuts] wwvb antenna transmission Well harder then I might think.
alex at pcscons.com
Thu Sep 6 21:43:08 EDT 2018
by making a loop around the territory, on which you would like to
receive the signal, inside of that loop you will have a very decent
reception without using to high transmit power a 100' x 200' area could
be covered with 100mW, since the wave length of the used low
frequencies is multiple of the length of the loop length , therefore the
current in the loop is constant along the loop. The polarization will
be changed, the magnetic component will be vertical -- the original wwb
field had horizontal magnetic, therefor the ferrite loop stick of the
clock -- which is now horizontal -- shall be turned vertical. The
described loop will not provide any substantial field outside the loop,
and it will not interfere with the original wwb horizontal magnetic
component transmission. The field outside of the loop diminishes very
fast therefore it does not constitutes any problem with the surrounding
area. I designed signal transmission system, which is working for the
last thirty something years.
On 9/6/2018 6:05 PM, Dana Whitlow wrote:
> You really don't want to be building an antenna that radiates energy, which
> is a far-field
> concept. In your case, at 30 ft range, you're so far inside the near field
> that all the
> antenna articles in the world won't help, since they address radiating into
> the far field.
> That's what WWVB needs to do, but not you. I think what you want to do is
> use a loop
> that is no larger than your house, preferably smaller, and push enough
> power into it
> to achieve your range goal (but not any further).
> On Thu, Sep 6, 2018 at 6:21 PM paul swed <paulswedb at gmail.com> wrote:
>> Working on the wwvb simulator and it works really well. On to the last
>> piece. Transmission over maybe 30 ft.
>> Ever notice everyone that makes a simulator has the clock on top?
>> Well thats because its pretty hard to get a 60 KHz signal actually out.
>> Even though I know loopsticks are not great transmit antennas that was the
>> first attempt. Hey what they say is true, Bad.
>> Next will be the loose wire over the distance. More likely a spare phone
>> wire pair that runs all over the house.
>> Just some humor.
>> I have found a ton of online articles on vlf antennas and such. Heck seems
>> like its time to read them.
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