Is it driven as an inductive loop? That might put it under different regulations. On 11 May 2015 17:47, "Chuck Harris" <cfhar...@erols.com> wrote:
> Yes, but in the case of the lawnmower fence, and the > invisible dog fence, the transmitter drives the fence > as an antenna. > > In the US, the antenna size for "free bands" is seriously > limited. As an example, the so called "Lowfer" band at > 136KHz is limited to antennas no larger than 15m in length. > > And, that is one of the larger limitations. > > 15m would encircle only a very small lawn. > > OBTW, I realized on reading my post below, that I was very > unclear on what could "be foiled." I meant that the > operating permission for the lawnmower system could probably > be foiled by looking into the maximum antenna lengths for > unlicensed services of this sort, in this frequency range. > > I would quite imagine that any certification they may have > is for the transmitter and receiver, without an antenna. > > -Chuck Harris > > Alex Pummer wrote: > >> >> >> yes for transmitter antennas, but not for receiver antennas in Austria >> Germany >> Switzerland France Hungary one could have receiver antenna as long as he >> want, but >> the height is limited similarly as in the US >> 73 >> KJ6UHN >> Alex >> On 5/10/2015 7:15 AM, Chuck Harris wrote: >> >>> My recollection is that in the US, certain requirements >>> exist for antenna length on the so called "free bands". >>> >>> I have no idea what the European requirements might be, >>> but, perhaps they can be foiled by their allowing their >>> minuscule amounts of power to flow into an over length >>> antenna? >>> >>> -Chuck Harris >>> >> _______________________________________________ > 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.