Also...just in case...make sure the wire is longer than the height of the tree...
73, Henry - K4TMC On Thu, Feb 11, 2016 at 9:57 AM, Dave Cole <[email protected]> wrote: > But the real question is: > > If the tree falls over, and no one hears it, did it really fall over, > and did the wire snap? > > Sorry, I could not resist... > -- > 73's, and thanks, > Dave > > For software/hardware reviews see: > http://www.nk7z.net > > For MixW support see: > https://groups.yahoo.com/neo/groups/mixw/info > > For SSTV help see: > http://groups.yahoo.com/neo/groups/MM-SSTV/info > > > > On Thu, 2016-02-11 at 14:34 +0000, Dauer, Edward wrote: > > In a recent post Jim, K9YC, suggested making hard-drawn copper wire > > for antennas by attaching a few hundred feet of bare copper wire to a > > tree or telephone pole at one end and to a bumper hitch at the other, > > then driving away very slowly until it snaps. That sounded like a > > very attractive idea - much in the ham tradition. I wondered, > > though, whether it could be done using a car without a bumper > > hitch. The minimum breaking strength of number 8 hard-drawn copper > > wire (though it might be closer to number 10 after being stretched) > > is between 644 and 826 pounds, according to a chart I found on the > > Internet. Rather than test it empirically with my 16-year-old SUV > > (no bumper hitch), I wondered what 700 or 800 pounds of shear force > > would do to an automobile frame, assuming attachment to a suitable > > bolt somewhere. Or would the tree fall over first? > > > > Ted, KN1CBR > > ______________________________________________________________ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:[email protected] > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to [email protected] > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
