Hi Dave, as a long time reader (since 1955) and subscriber I remember the
Amateur scientist pages ending in the 1980s. I think the contributer
retired. At around that time I think the many adherents formed the Society
of Amateur Scientists. Though I have not visited fot several years the web
site was www.sas.org and I believe had pdfs of old SciAm Amateur Scientist
articles.
I particularly remember one scary article about an X-ray generator that
consisted of a 6J5G tube ( I think a triode valve in the UK :-)) ) with a
piece of aluminium foil secured round the smaller diameter part of the top
with a twist of copper wire, and conected between the cathode pin and the
foil, a 2kV psu !! The end of the tube cathode (and heater wire) was clearly
visible through the top and formed a spot source of electrons. I believe an
X-ray plate of a hand was included in the article !!
There were many inovative ways of building quite sophisticated experiments.
Another I rememver was a Proton precession magnetometer using a radar
magnetron magnet.
Alan
G3NYK
----- Original Message -----
From: "paul swed" <[email protected]>
To: "Discussion of precise time and frequency measurement"
<[email protected]>
Sent: Wednesday, December 10, 2014 1:20 PM
Subject: Re: [time-nuts] 1968 Scientific American Magazine: Cesium
ClockStandards
Dave I do not know why but it was one of two things as I barely recall.
Magazine format change (Need dumber for more readers) or the fellow died.
That was a long time ago.
I know as a kid that inspired me on more then one occasion to do
something.
They are still a good read. there was some pdfs at some sight or a book or
something.
Regards
Paul
WB8TSL
On Wed, Dec 10, 2014 at 6:16 AM, Dr. David Kirkby (Kirkby Microwave Ltd) <
[email protected]> wrote:
I see this on eBay - it might interest some, and at $10 it will not
break the bank
http://www.ebay.ca/itm/1968-Scientific-American-Magazine-Cesium-Clock-Standards-Measurement-DNA-Dis-/381078816062
BTW, does anyone know why the Amateur Scientist column was dropped in
Scientific American? Perhaps the thought they might get sued if a
suggestion was made to use anything more dangerous than a teaspoon of
salt!
Dave
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