WWVB antenna
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Posts: 46,084
Hi,
I have recently been working with the WWVB broadcast from the atomic clock
in Colorado.
Parallax used to have a receiver module but it was quite costly. Surfing
around I have found
some other modules, mostly from Eurpoe, that could do the demodulating of
the 60khz signal.
I have one now but I have been looking for a suitable antenna, They also
sell one from Europe
but it would be cheaper to but an atomic clock from Fleebay and canibalize
it for the antenna.
Although this defeats this purpose since it is an atomic clock already!
MY question is where can I find info on how they make the WWVB antennas so
small? All that I
have read about or seen have a ferrite core. The atomic wristwatches have
tiny antennas that
are tuned to the 60khz via coil wrapped ferrite core with capacitor in
parallel. So where can
I find values for number of windes, wire size , cap value etc?
Realistically it is just wire
wrapped on a ferrite core and a cap but I dont really want to do the trial
and error method.
I do know the f = 1/2*pi*sqr(LC) resonance formula but somebody has had to
already figured this out.
Thanks,
Bob
I have recently been working with the WWVB broadcast from the atomic clock
in Colorado.
Parallax used to have a receiver module but it was quite costly. Surfing
around I have found
some other modules, mostly from Eurpoe, that could do the demodulating of
the 60khz signal.
I have one now but I have been looking for a suitable antenna, They also
sell one from Europe
but it would be cheaper to but an atomic clock from Fleebay and canibalize
it for the antenna.
Although this defeats this purpose since it is an atomic clock already!
MY question is where can I find info on how they make the WWVB antennas so
small? All that I
have read about or seen have a ferrite core. The atomic wristwatches have
tiny antennas that
are tuned to the 60khz via coil wrapped ferrite core with capacitor in
parallel. So where can
I find values for number of windes, wire size , cap value etc?
Realistically it is just wire
wrapped on a ferrite core and a cap but I dont really want to do the trial
and error method.
I do know the f = 1/2*pi*sqr(LC) resonance formula but somebody has had to
already figured this out.
Thanks,
Bob