And it's Lamoure not Lemoure (says the ex-North Dakotan). I actually visited that site back when I was attending Science Scool in Wahpeton. Racks and racks of mux's.
Myron WVØH Printed on Recycled Data > On Nov 28, 2014, at 1:54 PM, Ken G Kopp <kengk...@gmail.com> wrote: > > Hi Roger! > > Yes, you're not the first to spot my error about ND, and my friend is > trying to confirm where the WWVB > LORAN C transmitter came from > > I used to do hamfest talks on antennas for 160M and used several slides of > the George, WA station. Last time I was there they had a Bobcat on the > roof clearing ash from the Mt. St. Helens eruption. > > Ken - K0PP >> On Nov 28, 2014 1:41 PM, "Roger D Johnson" <n...@roadrunner.com> wrote: >> >> Interesting! As a former LORAN C guy I'm happy that at least one >> transmitter >> found a new home. You mentioned earlier that the transmitter came from the >> station in ND. However, the station in Lemoure, ND was an Omega station, >> not LORAN C. >> >> 73, Roger CWO4, USCG (ret) >> >> >>> On 11/28/2014 3:18 PM, Ken G Kopp wrote: >>> >>> I have a long-time close friend who's retired from >>> the NBS in Boulder and was the project engineer >>> on the NBS #7 cesium standard. After the recent >>> reflector postings about WWV / WWVB I thought >>> I would get first-hand recent information from him. >>> >>> The GPS satellites all carry on-board cesium >>> standards that are synchronized with NTIS, and >>> because of changes (below) to WWVB, cell phones >>> remain the most accurate source of time for most of us. >>> >>> All the HF transmitters at Ft. Collins are the same TMC >>> units that were put in service when the facility was built. >>> The 2.5 and 20 MHz transmitters run at lower power due >>> to propagation considerations. >>> >>> The time and other station-related voice info is sourced >>> on site in Ft. Collins, and the various propagation and >>> weather info comes from various "dial in" land-line >>> sources. Hence the widely varying quality of these >>> announcements. I forgot to ask about the individual >>> who made the voice recordings ... >>> >>> Here's the most important info .... as of about a year >>> ago the modulation scheme on WWVB (60 kHz) was >>> changed (phase reversal each minute) and this has >>> rendered most of the end-user equipment inoperative. >>> Most (all ?) tracking receivers like the HP-117's are >>> now useless without extensive modification. >>> >>> Most of the "atomic" clocks now in use ->do not<- synch >>> to the current modulation scheme on the 60 kHz signal. >>> This will explain the differences in displayed time on >>> supposedly identical clocks and how some appear to >>> not be getting sufficient enough signal to synchronize. >>> >>> He offered no comment on how to locate "consumer" >>> clocks that -do- respond to the "new" modulation scheme. >>> >>> The 60 kHz transmitter is indeed an ex-LORAN C unit, >>> and because of the higher power of the "new" transmitter >>> the antenna system was rebuilt using material from the >>> LORAN C site. >>> >>> The 20 kHz transmitter was "home made" by NBS staff >>> at the old Beltsville, MD facility and moved to Ft. Collins. >>> There is no longer an antenna for this transmitter and it >>> will not return to the air. Trivia: The antenna was of >>> such high-Q that a near-by thunderstorm system would >>> often detune the system and cause the overload protection >>> to trip the transmitter off. >>> >>> He suggests that a visit to the NBS website would be >>> "informative". >>> >>> 73 >>> >>> Ken Kopp - K0PP >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:Elecraft@mailman.qth.net >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> Message delivered to n...@roadrunner.com > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to myronschaf...@gmail.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
