Re: [Phys-L] Ham radio. was: Re: (no subject)

[Anthony Lapinski <alapinski@pds.org>]

Interesting. Technology has changed/improved/downsized over the years. I
remember going to a star party around 1982/83 in Chicago. A guy there
showed me and my dad the first portable phone. The thing was large with an
antenna, and had a larger battery connected by a cord. The guy thought it
was cool! My dad and I thought to ourselves that this is crazy. Who would
use a bulky portable phone? And now most of society can't live without
their smartphones!

On Sun, Mar 22, 2020 at 3:41 PM bernard cleyet via Phys-l <
phys-l@mail.phys-l.org> wrote:

> I was a bit later, probably 16.  (ca. 1953) I wasn’t interested in
> talking, just be legal in experimenting.  However, I managed to voice
> communicate via. the 420-450 MHz ham band from San Marcos Pass to a friend
> in down town Santa Barbara, about nine miles, AARL field day. [1}  I
> discovered later the APS-13 IFF unit in a San Francisco surplus store.
> While a Sophomore at UCSB, one of the profs. was setting up a large scale
> cosmic ray shower detector.  He was going to use co-ax. cable.  I suggested
> radio using the APS-13, which already had a blocking osc. pulse generator,
> transmitter and receiver.  The detector had about five Cherenkov detectors
> paired 5” MPTs in coincidence looking at water in heavy Al army stock pans
> (10 gal?);   diameter of detector circle about a half mile?  This was for
> the International Geophysical Year (1957/58).  My intro. to radio while in
> HS was a 6J6 oscillator. (These were the transmitter, a pair, in the
> APS-13).  I managed to “get it up” to 800 MHz measured w/ lecher wires.
> Resonance length detected with a torch bulb in a wire loop.  I drove the
> tube hard, cooled in a cup of water, intermittent use, of course.
>
> bc waxing nostalgic.
>
>
> [1] I still have the transmitter and receiver and one APS-13.  The plate
> diss. is ~ 30 W.  This is laughable now, wherein all in a tiny IC!   And
> much higher frequencies.  My friend at the Exploratorium is experimenting
> with the mm wave radar IC used in ’bile's vehicle proximity sensor.  (Our
> Prius’ most useful feature!)
>
> > On 2020/Mar/22, at 01:29, Bob Sciamanda via Phys-l <
> phys-l@mail.phys-l.org> wrote:
> > When I was a boy of 14 I was a Ham Radio Operator. We built radio
> > transmitters and chatted with others world wide.
> > Now modern technology lets EVERYONE do this via the internet using
> > facebook, etc and cell phones. We used both Phone and Morse Code. Now it
> is
> > Voice and Texting!
> >
> > Bob Sciamanda
> > Physics, Edinboro Univ of PA (em)
> > treborsciamanda@gmail.com
> > www.sciamanda.com
> > _______________________________________________
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