[time-nuts] WWVB BPSK Receiver Project? (fwd)

[Poul-Henning Kamp]

In message <4F64F279.4040208 at arcor.de>, ehydra writes:
>Marek Peca schrieb:

>> This was almost the only reason for ferrite rod -- simplicity and 
>> attenuation of TVs, some LCDs, 50Hz etc.
>
>If you make the antenna about 10x bigger you can omit the whole ferrite. 

I have used two antennas, an unloade air-coil, actually plastic-lid-coil:

	http://phk.freebsd.dk/loran-c/Antenna/

and a vertical monopole based on a Chris Trask design I can highly
recommend:

	http://home.earthlink.net/~christrask/Complementary%20Push-Pull%20Amplifiers.pdf

In my implementation, it covered DC to 200MHz until I low-pass'ed it.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.