Hi Same gotcha as the horizontal dipole - most of the energy is shorted out by the ground. Think of a transformer with a shorted turn.
Bob On Oct 5, 2010, at 5:58 PM, J. Forster wrote: > A loop around the house? > > -John > > ============== > > >> Hi >> >> Ok, the next layer to this onion is the antenna. At 100KC your antenna is >> 35X smaller than it is on 80 meters foot for foot. In other words, your >> 100' tall vertical on 80 equates to a <3 foot tall antenna at 100 KC. QRP >> on 80 with a 3' transmit antenna anybody? Been there done that, not much >> range at all. At VLF forget about transmitting with a horizontal antenna >> unless you are airborne. >> >> It's not just the antenna, the ground counts as well. If you are by the >> seashore that may not be a big deal. If you are inland, prepare to lay >> many very long radials. >> >> ---------- >> >> After that you hit signal to noise. The receivers worked as well as they >> did because they had an enormous signal to work with. There's an amazing >> amount of crud running around down below 200 KHz these days. Even for >> timing you need a lot of signal to get good results. >> >> Bob >> KB8TQ >> >> Ham for way more than 30 years.... >> >> >> On Oct 5, 2010, at 4:59 PM, paul swed wrote: >> >>> Well crazy as it sounds if you are at 100 KC you might just want 1 loran >>> tower in a chain or even fewer. You only need 1 station not 3. Timing >>> rcvrs >>> worked on one signal. >>> >>> >>> On Tue, Oct 5, 2010 at 4:46 PM, <shali...@gmail.com> wrote: >>> >>>> Not necessarily, on 3 phase systems, you would have to be creative to >>>> get >>>> below .9 >>>> >>>> You can easily get to .95 with a simple multipulse rectification. >>>> Beyond >>>> that, other than regulatory compliance, you do not gain much >>>> efficiency. >>>> >>>> I can't imagine these systems running on anything other than 3 phase >>>> power. >>>> >>>> Didier >>>> >>>> Sent from my Verizon Wireless BlackBerry >>>> >>>> -----Original Message----- >>>> From: "J. Forster" <j...@quik.com> >>>> Sender: time-nuts-boun...@febo.com >>>> Date: Tue, 5 Oct 2010 13:37:21 >>>> To: Discussion of precise time and frequency measurement< >>>> time-nuts@febo.com> >>>> Reply-To: j...@quik.com, Discussion of precise time and frequency >>>> measurement >>>> <time-nuts@febo.com> >>>> Subject: Re: [time-nuts] 60 KHz Receiver >>>> >>>> And the Power Factor sucks, so there is a lot less real power being >>>> used. >>>> >>>> -John >>>> >>>> ============= >>>> >>>>> Ok, but that is no megawatt! >>>>> >>>>> Also, most of the transmitters were doing multi duty, handling >>>>> several chains simultaneously. That would up the average power >>>>> proportionately. >>>>> >>>>> -Chuck Harris >>>>> >>>>> Poul-Henning Kamp wrote: >>>>>> In message<4cab888b.4040...@erols.com>, Chuck Harris writes: >>>>>>> It is a pulse transmitter. It makes short bursts of 10 or 12 >>>>>>> pulses, >>>>>>> and then waits one GRI, and then does it again. I would think the >>>>>>> actual continuous power draw is around 10Kw. >>>>>> >>>>>> http://phk.freebsd.dk/photos/L9007M/dscf0458.jpg.html >>>>>> >>>>>> About 50kW for Ei�i (400kW, 9007M) >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> 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. > _______________________________________________ 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.