You might be thinking of the file that David Byrne sent to the HP list last year on 9/7/13. It was an article by C. L. Stong and I think it was published in The Amateur Scientist in 1963. You should be able to find it in the HP list archives.
Bob ________________________________ From: Max Robinson <m...@maxsmusicplace.com> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Sent: Friday, June 27, 2014 11:14 AM Subject: Re: [time-nuts] Loran, GPS, Lightning, Timing I think the QST article being referred to in this thread is one that I remember rather clearly. I kept the issue for a long time but it got away from me somewhere along the line. It was a lightening direction finder using a display much like a radar PPI. It used two crossed untuned loops and a vertical. All three signals were amplified using tubes and one of the loops was fed to the horizontal deflection plates of a CRT and the other loop's signal was fed to the vertical plates. The signal from the vertical was fed to the control grid of the CRT. The project was essentially an XY scope built from the ground up. He suggested figuring out the polarity of things by waiting for close lightening that was visible and correlating sightings with the display on the CRT. You wouldn't use a general purpose scope because the fair weather condition would burn a spot in the center of the screen. One more thing. He wound the loops in hula hoops he had cut open. I still have two hula hoops awaiting the project. The bandwidth of his amplifiers was low audio to about 100 kHz. I suspect that in today's radio environment some tuned traps would be necessary to notch out some of the strong signals in that frequency range. You now have all the information I have and I am sure I could build one if only I could find the time. Regards. Max. K 4 O DS. _______________________________________________ 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.
