[time-nuts] LORAN-C antenna

[Poul-Henning Kamp]

In message <01da01c826c0$1e14b8f0$6501a8c0 at didierhp>, "Didier Juges" writes:
>); SAEximRunCond expanded to false
>Errors-To: time-nuts-bounces+phk=phk.freebsd.dk at febo.com RETRY
>
>OK, thanks for the useful information . I thought you might have resonated
>the loop to get some filtering ahead of the preamp, which is what I would
>have done, not knowing any better...

I also use that antenna for various other VLF experiments, DCF77, MSF etc,
so I didn't want to make it too resonant.

>[...]so I may tune the loop and get some filtering.

If you're doing your own LORAN-C receiver in software like me, then
it is a useful fact to remember that you can do pretty much anything 
you want to your antenna signal, as long as you do the same to the
Loran-C reference pulse you use in your algorithms:

I have received quite acceptable LORAN-C signals with a 3kHz bandwidth
by correlating with a reference pulse that had been through the same
filter.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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