[time-nuts] LORAN C antenna thoughts from the group
jfor at quik.com
Tue Dec 21 18:59:30 UTC 2010
I remember reading somewhere that the envelope of the LORAN pulses was
shaped to reduce the transmitted BW.
Does anybody have a reference for that, and relatedly, what does the BW of
the antenna have to be? Typically, loops are about 90 KHz to 110 KHz, but
can that be narrowed down?
> In message <AANLkTikgJbL4Yvpifgp8eDFQFiRacaARMxHi5jqSoU=h at mail.gmail.com>,
> swed writes:
>>OK now that I can actually receive the 90070 chain in the US. What might
>>a better antenna then my whip and preamp?
>>A big loop and preamp? A tall vertical over a ground plane. Tried 67 ft
>>yielded little. How might reception be improved in the US?
> I built a trivial loop based on a design-idea I found at vlf.it
> It's basically a loop with an AD797 amplifier and some power-filtering,
> didn't even write a schematic for it...
> Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
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