[time-nuts] Loran, GPS, Lightning, Timing

DaveH info at blackmountainforge.com
Sat Jun 28 04:34:48 UTC 2014


The only C.L. Stong (W2PFM - great call!!!) article that I could find at QST
came up in an archive search:  "How to Cook a Ham" from March 1947

A story about not having safety interlocks and getting zapped.

http://p1k.arrl.org/pubs_archive/28044

You need to be an ARRL member to access the file.

I also searched for "Lightning" and found nothing about detecting nearby
strikes, only about protection. Searched from around 1980 back through 1940.

Same for e-field.

Dave
KF7VNE


> -----Original Message-----
> From: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] On Behalf Of paul swed
> Sent: Friday, June 27, 2014 10:42
> To: Bob Stewart; Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Loran, GPS, Lightning, Timing
> 
> It was QST and Max is right. I built it. There was a e-field 
> antenna for
> amplitude and the crossed antennas the XY access. I guess the 
> old brain has
> somethings correct.
> Now can I remember the tube line up. Heavens no. :-) The CRT 
> was a little
> mil surplus 3p...
> But enough of that. Whats the chance of finding the article 
> that would be a
> kick.
> Regards
> Paul
> WB8TSL
> 
> 
> On Fri, Jun 27, 2014 at 12:28 PM, Bob Stewart <bob at evoria.net> wrote:
> 
> > 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 <max at maxsmusicplace.com>
> > To: Discussion of precise time and frequency measurement <
> > time-nuts at 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.
> > _______________________________________________
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