I find that very puzzling. I was a subscriber to QST from some time in 1957 until into the 1960s. I didn't have a subscription to Scientific American so I couldn't have confused them. I suppose the article has been lost or somehow escaped being entered into the searchable database. Regards. Max. K 4 O DS. Email: max@maxsmusicplace.com Transistor site http://www.funwithtransistors.net Vacuum tube site: http://www.funwithtubes.net Woodworking site http://www.angelfire.com/electronic/funwithtubes/Woodworking/wwindex.html Music site: http://www.maxsmusicplace.com To subscribe to the fun with transistors group send an email to. funwithtransistors-subscribe@yahoogroups.com To subscribe to the fun with tubes group send an email to, funwithtubes-subscribe@yahoogroups.com To subscribe to the fun with wood group send a blank email to funwithwood-subscribe@yahoogroups.com ----- Original Message ----- From: "Brian Lloyd" <brian@lloyd.com> To: "Discussion of precise time and frequency measurement" <time-nuts@febo.com> Sent: Saturday, June 28, 2014 8:52 AM Subject: Re: [time-nuts] Loran, GPS, Lightning, Timing > On Fri, Jun 27, 2014 at 11:34 PM, DaveH <info@blackmountainforge.com> > wrote: > >> >> I also searched for "Lightning" and found nothing about detecting nearby >> strikes, only about protection. Searched from around 1980 back through >> 1940. >> > > There are a number of products on the market that make use of lightning > detection and ranging. The BF Goodrich "Stormscope" is based on that. > There > have to be some documents around on its design. It is, in essence, a LF > ADF > and somehow qualifies the envelope to deduce range to the strike which it > then displays to the pilot. > > -- > Brian Lloyd > Lloyd Aviation > 706 Flightline Drive > Spring Branch, TX 78070 > brian@lloyd.com > +1.916.877.5067 > _______________________________________________ > 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.

Yes, that is precisely the device I built; I was in high school at the time but had been a licensed ham for 5 years and built much of my own equipment. My father had access to a machine shop and helped with the soft iron pole pieces and a few other items but I built all the electronics. And, it worked! Alas, that was a long time ago and I don't now know what happened to the spectrometer. I did not know this article reprint is in a published book. I do have all the Amateur Scientist articles on CD. Coincidentally, another local ham and also a Time Nut recently told me he built one also! Who else here did? Larry W6FUB On 6/28/2014 11:52 AM, Bob Stewart wrote: > There's an interesting (and on topic) project in that book starting on page 335, discussing a home-made Magnetic Resonance Spectrometer. I wonder if any time-nuts have constructed such a device, and what potential accuracy it would have? > > Bob - AE6RV > > > > ________________________________ > From: DaveH <info@blackmountainforge.com> > To: 'Discussion of precise time and frequency measurement' <time-nuts@febo.com> > Sent: Saturday, June 28, 2014 1:09 PM > Subject: Re: [time-nuts] Loran, GPS, Lightning, Timing > > > A PDF of the 1960 book can be found here: > > http://www.sciencemadness.org/library/books/projects_for_the_amateur_scienti > st.pdf > > Dave > _______________________________________________ > 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. > > -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland)

I built the Van de Graaff generator / electron accelerator with a buddy for a high-school science project. My Dad was a physicist so was able to borrow a vacuum system and not have to make that part. Lost to a guy who had done a ruby laser - this was back in 1966. Dave > -----Original Message----- > From: time-nuts-bounces@febo.com > [mailto:time-nuts-bounces@febo.com] On Behalf Of Larry McDavid > Sent: Saturday, June 28, 2014 15:18 > To: Bob Stewart; Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] Magnetic Resonance Spectromater; was > Re: Loran, GPS, Lightning, Timing > > Yes, that is precisely the device I built; I was in high > school at the > time but had been a licensed ham for 5 years and built much > of my own > equipment. My father had access to a machine shop and helped with the > soft iron pole pieces and a few other items but I built all the > electronics. And, it worked! > > Alas, that was a long time ago and I don't now know what > happened to the > spectrometer. > > I did not know this article reprint is in a published book. I do have > all the Amateur Scientist articles on CD. > > Coincidentally, another local ham and also a Time Nut > recently told me > he built one also! Who else here did? > > Larry W6FUB > > > On 6/28/2014 11:52 AM, Bob Stewart wrote: > > There's an interesting (and on topic) project in that book > starting on page 335, discussing a home-made Magnetic > Resonance Spectrometer. I wonder if any time-nuts have > constructed such a device, and what potential accuracy it would have? > > > > Bob - AE6RV > > > > > > > > ________________________________ > > From: DaveH <info@blackmountainforge.com> > > To: 'Discussion of precise time and frequency measurement' > <time-nuts@febo.com> > > Sent: Saturday, June 28, 2014 1:09 PM > > Subject: Re: [time-nuts] Loran, GPS, Lightning, Timing > > > > > > A PDF of the 1960 book can be found here: > > > > > http://www.sciencemadness.org/library/books/projects_for_the_a > mateur_scienti > > st.pdf > > > > Dave > > _______________________________________________ > > 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. > > > > > > -- > Best wishes, > > Larry McDavid W6FUB > Anaheim, California (SE of Los Angeles, near Disneyland) > _______________________________________________ > 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.

Back on the topic of lightening, a destructive side of lightening can occur with between-cloud strikes. Beneath a cloud with a hefty charge on it there is a counter charge, a reflection, on the earths surface. This will have the same amount of charge but in inverse polarity. When the charge in the cloud jumps to another cloud, the counter charge has to move to beneath the new cloud. This involves currents of equal magnitude to lightening strikes moving in a similar time frame. Any water pipe or buried telephone or power cable may be obliged by a potential voltage similar to a lightening strike to carry part of this current. I saw a buried phone line that had been 3 feet underground converted to an open trench 100 yards long. Any conducting cable that cuts the transient magnetic field during one of these events may be a victim. Fibre optic would seem to be the answer for protection. cheers, Neville Michie

On Sat, Jun 28, 2014 at 6:55 PM, DaveH <info@blackmountainforge.com> wrote: > I built the Van de Graaff generator / electron accelerator with a buddy for > a high-school science project. My Dad was a physicist so was able to > borrow > a vacuum system and not have to make that part. > > Lost to a guy who had done a ruby laser - this was back in 1966. > I built the MRS and won the LA County Science fair and placed in the California State Science fair with it in 1968. I was 13. I also build one of the seismograph designs just for fun. I did not build the quartz reference clock design in the book but used the idea to motivate me to add a quartz reference to the 60Hz inverter I built from the ARRL handbook, using a bunch of DTL flip-flop dividers, to drive a mechanical clock with a synchronous motor. This was in 1969. So I guess that delimits the beginning of my time-nuttery. -- Brian Lloyd Lloyd Aviation 706 Flightline Drive Spring Branch, TX 78070 brian@lloyd.com +1.916.877.5067