On Tue, 24 Jan 2006, xpyttl wrote:

Well, I suppose it depends on where OP is. Here in the middle, 10 MHz isn't
much of a problem but 15 is.

I am in Rochester, NY.

*HOWEVER*, 10 has one huge advantage -- there are very low cost uP crystals
for 10 MHz, so building even a simple reciever with a brick wall front end
isn't such a big deal, if the only frequency you care about is 10 MHz.

Yes, that is what I was thinking. Is there a simple way to do frequency
multiplication (or division) to get 2.5, 5, 15, and 20 MHz additionally,
and thus be able to switch between all of the WWV frequencies?

"Brick wall front end"?

Personally, I'd go with a DC rather than a regen - a lot simpler and these
days, a simple SA612 will give you way more sensitivity than you can
possibly use on 10 MHz for a couple bucks.

Heck, if the local QRM isn't too strong, I bet a 10 MHz uP crystal, a
612 and an audio amp (like a 386 or so) is all you would need.

That sounds great.

A friend of mine did an article on a simple WWV reciever for QRP Homebrewer
recently, issue #5 I think. He was more interested in the frequency
standard than hearing the sounds, so his contribution was recognizing the
zero beat, but still an interesting article if you can find a copy.

I don't see any articles on WWV receivers there... Does anything look
familiar: http://www.njqrp.org/data/qrp_homebrewer.html

thanks,
Tobin Fricke

--
http://web.pas.rochester.edu/~tobin/