The antennas I use mostly at work accept between 2.5V and 24V. Most receivers I use give around 3.3V. In the basement I have receivers giving 12V to the antenna.
There are receivers giving 5V, but it is much less dominant than 10 years ago. -- Björn > I think 5v is most common now days, too. The old Odetics GPStat (even > older than the GPStar!) provided regulated 8 or 9 volts, I forget which. I > had to add a 5v regulator to allow use of a newer antenna. > > Good luck with the testing, Graham! > > Steve > > > On Mar 2, 2012, at 10:51 AM, Greg Broburg <semif...@comcast.net> wrote: > >> I am an engineer and avionics tech. They were powered up the coax from >> the Apollo IIMorrow 602-604-808-612-618 by a regulated internal supply. >> I believe that it was either 5V or 8V most likely 5V. All of the GPS >> antennas that I am aware of are powered up the coax by 5V. It is very >> important that this Voltage be very clean and these radios were built to >> operate from 11 to 32 V because the aircraft are either 14 or 28V >> systems and there was no desire to build different units for different >> Voltages. I have several of these old radios, suppose I could power one >> up and see what it is. >> >> Greg >> >> On 3/2/2012 10:36 AM, Steve wrote: >>> Graham, >>> >>> If the preamp was powered from aircraft power rather than from the >>> receiver coax it may be 24v. >>> >>> Steve >>> WB0DBS >>> >>> >>> On Mar 2, 2012, at 9:05 AM, "Collins, Graham"<coll...@navcanada.ca> >>> wrote: >>> >>>> Paul, >>>> >>>> That would be my guess too but these preamps are ex aircraft >>>> installations. >>>> >>>> As to documentation, yes "real" documents are not easy to find but >>>> there is always the change that someone on this list has some first >>>> hand knowledge of these preamps. >>>> >>>> Cheers, Graham ve3gtc >>>> >>>> >>>> >>>> -----Original Message----- >>>> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] >>>> On Behalf Of paul swed >>>> Sent: March 2, 2012 09:54 >>>> To: Discussion of precise time and frequency measurement >>>> Subject: Re: [time-nuts] LORAN C update >>>> >>>> Graham can only speculate that they were 8-12V. Most LORAN antennas >>>> were. >>>> As fars as actual docs. Boy thats awful rare. >>>> Regards >>>> Paul >>>> >>>> On Fri, Mar 2, 2012 at 9:50 AM, Collins, >>>> Graham<coll...@navcanada.ca>wrote: >>>> >>>>> On the subject of Loran C, I have a couple of Loran C antenna preamps >>>>> kicking around that I have not up to this point done anything with. >>>>> This >>>>> talk of Loran C being "back on" has me thinking of the getting >>>>> something >>>>> set up to try and receive these new signals. >>>>> >>>>> What I have is one each of II Morrow Loran Preamp A-6 and an Arnav >>>>> 455-6021 T-1000. >>>>> >>>>> Trouble is I don't have any documentation. >>>>> >>>>> Can anyone point me where I might find some online documentation for >>>>> either or both of these devices? >>>>> >>>>> I assume they require their power via the coax but couldn't guess as >>>>> to >>>>> whether it's 5, 12, 24, or 48V. >>>>> >>>>> Cheers, Graham ve3gtc >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> time-nuts mailing list -- time-nuts@febo.com >>>>> To unsubscribe, go to >>>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>>>> and follow the instructions there. >>>>> >>>> _______________________________________________ >>>> time-nuts mailing list -- time-nuts@febo.com >>>> To unsubscribe, go to >>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>>> and follow the instructions there. >>>> >>>> _______________________________________________ >>>> time-nuts mailing list -- time-nuts@febo.com >>>> To unsubscribe, go to >>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>>> and follow the instructions there. >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >> >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.