I was going to suggest WWV until I saw his signature line and=20 found this: http://en.wikipedia.org/wiki/Radio_VNG http://ac6v.com/standard.htm "Most time signals outside the US are within a few khz of 5, 10, and 15 Mhz= , because there's a narrow band around those freqs that is Allocated for ti= me signals. (There are also allocations for 2.5, 20, And 25 Mhz, but they a= re rarely used. NIST canned its 20 Mhz outlet Years ago.) Most of the forei= gn services try to avoid competing Directly with WWV/WWVH, except Venezuela= , which has a time service That directly competes with WWV. (Hugo Chavez lo= ves to tweak the nose Of the US any way he can.) Increasing numbers of fore= ign time services Have been shelved for good in the last decade due to agin= g equipment And lack of funding. The Soviets, then the Russians, had a time= Station that is likely no longer active. VNG is gone, which outraged Austr= alian owners of radio controlled clocks that used VNG's VLF time Signal. Th= ere were services in Chile and a few other places that have Disappeared. On= ly England, Germany, Japan, and the US maintain VLF Time signals. The main = HF signals are! in the US, Canada, and Venezuela." -----Original Message----- >From: Bob Blick >Sent: Dec 31, 2012 6:01 PM >To: "Microcontroller discussion list - Public." >Subject: [EE]Re: GPS Modules > >Added a tag. > >And also an opinion about GPS modules. They use a lot of power, >relatively speaking. And they take a long, long time to get a fix when >powered up. The more expensive ones can be quicker getting a fix, but >only if they location has not changed by very much. If you can live with >those drawbacks, they do work fine most of the time. But not all the >time. > >On Mon, Dec 31, 2012, at 03:55 PM, David Duffy (AVD) wrote: >> I have a need for some field equipment to have an RTC, but was wanting=20 >> to avoid the hassles of setting it and maintaining accuracy. >>=20 >> All of these units are outdoors, so would using a GPS to get the current= =20 >> time work on a long term basis? >>=20 >> The price of a GPS module (assuming < $100) can be justified for the=20 >> application. Are there some reliable modules that you have used? >> David... >>=20 >> --=20 >> ___________________________________________ >> David Duffy Audio Visual Devices P/L >> Unit 8, 10 Hook St, Capalaba 4157 Australia >> Ph: +61 7 38235717 Fax: +61 7 38234717 >> Our Web Site: www.audiovisualdevices.com.au >> ___________________________________________ > >--=20 >http://www.fastmail.fm - Email service worth paying for. Try it for free > >--=20 >http://www.piclist.com PIC/SX FAQ & list archive >View/change your membership options at >http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .