Re: Simple 60 Khz Transmitter Design?


<pollen@xxxxxxxxxxxxxx> wrote in message
news:95e4a0eb-b87b-49a9-9019-cd3fa794b036@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
I'd like to be able to update my watches with the NIST atomic time
broadcast, which unfortunately we don't have here in Australia. I've
looked at the format of the broadcast and think it should all be quite
achievable except the actual RF, which I have no experience in. I
would like to know if anyone experienced with transmitter design is
out there and can confirm for me if this simple idea might work.

To my way of thinking 60 Khz is extremely low frequency, so I was
thinking of just using a 555 timer (wired for 50% duty cycle), with
the output hooked through a capacitor (to make it AC) and a coil (to
make it more sine-waveish) to a short length of wire for an antenna.
Would that constitute a transmitter?

Sean

I hope before you (and a lot of members of this NG) waste any more
"time" on this problem you realise 2 things.

1. a 555 timer is less acurate than a klepsydra and certainly less
accurate than a 1925 long case pendulum clock I have in my lounge room.

2. There is a whole lot of data embedded in the 60khz signal that you
cannot generate without first owning an atomic clock to establish the
time.

John G.


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