--------
In message <[email protected]>, Ole Stender Nielsen writes:
>I use a home-made untuned loop antenna [...]
A note about Loran-C and loop-antennas:
The loop-antennas are sensitive to magnetic fields and therefore
sensitive to direction.
Depending on side of the loop you point at the Loran-C transmitter
you will get a "true" or inverted signal.
If you get an inverted signal, a Loran-C receiver will lock onto
the wrong zero-crossing, which will increase your phase noise
because only the 3rd positive crossing is truly steered.
If you want to receive more than one Loran-C transmitter, the
directivity of the loop-antenna is a disadvantage and you are better
of with a monopole (electric) antenna.
I can recommend Chris Trasks designs:
http://www.home.earthlink.net/~christrask/
I built one from the "Complementary Push-Pull Active Antenna Amplifiers"
document and it drags in signals from 4kHz to well north of 150Mhz.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
[email protected] | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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