Alex Funny you bring up the loop antenna. Thats definitely one of the answers I ran across. Though I was trying to avoid the wire loop. But that said actually what I need to drive can be quite a small loop so maybe the right answer. Along those lines I need to look at the driving Z. Sort of thinking 600 ohms may be useful and shielded pair to carry the rf to the loop. It doesn't have to be a 50 ohm system at 60 KHz. Thanks Paul
On Thu, Sep 6, 2018 at 9:43 PM, Alex Pummer <[email protected]> wrote: > by making a loop around the territory, on which you would like to receive > the signal, inside of that loop you will have a very decent reception > without using to high transmit power a 100' x 200' area could be covered > with 100mW, since the wave length of the used low frequencies is multiple > of the length of the loop length , therefore the current in the loop is > constant along the loop. The polarization will be changed, the magnetic > component will be vertical -- the original wwb field had horizontal > magnetic, therefor the ferrite loop stick of the clock -- which is now > horizontal -- shall be turned vertical. The described loop will not provide > any substantial field outside the loop, and it will not interfere with the > original wwb horizontal magnetic component transmission. The field outside > of the loop diminishes very fast therefore it does not constitutes any > problem with the surrounding area. I designed signal transmission system, > which is working for the last thirty something years. > > 73 > > Alexander Pummer > > > > > On 9/6/2018 6:05 PM, Dana Whitlow wrote: > >> Paul, >> >> You really don't want to be building an antenna that radiates energy, >> which >> is a far-field >> concept. In your case, at 30 ft range, you're so far inside the near >> field >> that all the >> antenna articles in the world won't help, since they address radiating >> into >> the far field. >> That's what WWVB needs to do, but not you. I think what you want to do is >> use a loop >> that is no larger than your house, preferably smaller, and push enough >> power into it >> to achieve your range goal (but not any further). >> >> Dana >> >> >> On Thu, Sep 6, 2018 at 6:21 PM paul swed <[email protected]> wrote: >> >> Working on the wwvb simulator and it works really well. On to the last >>> piece. Transmission over maybe 30 ft. >>> Ever notice everyone that makes a simulator has the clock on top? >>> Well thats because its pretty hard to get a 60 KHz signal actually out. >>> Even though I know loopsticks are not great transmit antennas that was >>> the >>> first attempt. Hey what they say is true, Bad. >>> Next will be the loose wire over the distance. More likely a spare phone >>> wire pair that runs all over the house. >>> Just some humor. >>> I have found a ton of online articles on vlf antennas and such. Heck >>> seems >>> like its time to read them. >>> Regards >>> Paul >>> WB8TSL >>> _______________________________________________ >>> time-nuts mailing list -- [email protected] >>> To unsubscribe, go to >>> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >>> and follow the instructions there. >>> >>> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to http://lists.febo.com/mailman/ >> listinfo/time-nuts_lists.febo.com >> and follow the instructions there. >> >> --- >> This email has been checked for viruses by AVG. >> https://www.avg.com >> >> > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to http://lists.febo.com/mailman/ > listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
