B
bob urz
- Jan 1, 1970
- 0
http://www.bvws.org.uk/405alive/tech/safety.html
I especially like the radioactive turntable....
bob
I especially like the radioactive turntable....
bob
bob urz said:http://www.bvws.org.uk/405alive/tech/safety.html
I especially like the radioactive turntable....
bob
root said:At one point the article cited says electricity doesn't give any
warning. It has always been my experience that I can very lightly touch
and move my finger over a hot chassis and feel a sort of vibration. I
never got a shock doing that.
Jeff Liebermann said:For hunting radioactive antiques, I used a home made scintillation
counter. I intentionally made it *NOT* look like the traditional gun
for obvious reasons. It's about 10 times as sensitive as my Geiger
counter and is perfect for sweeping large areas. In about 1986, I
found a bottle of Radithor, which is Radium Water. I later sold it to
a collector.
Since about 1995 Coleman lantern mantles use Yttrium Oxide and have no
radioactive material. I have some of the really old mantles that use
Thorium, an Alpha particle belcher. The old mantles are fairly hot in
the plastic bag which blocks most Alpha particles. However, when
removed from the bag, the mantles send my counter into hysterics at
about 8,000 counts per minute.
My idea of fun was in 1989, when Chernobyl did the meltdown thing, I
dragged a 1950's era Civil Defense Geiger counter to the local
supermarket and used it to check the produce. The manager was a
friend so I wasn't arrested, but I was adequately amused by all the
panicky customers and irate staff.
Here's another of my medical adventures with radioactivity and my
1950's era Geiger counter:
My favorite radioactive material is potassium (no sodium) salt. The
Potassium 40 is mildly radioactive and will do about 100 counts per
minute. Background is about 10 cpm. Sea salt will do about 50
counts. This is always fun to demonstrate in a health food store.
--
Jeff Liebermann [email protected]
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
Phil Hobbs <pcdhSpamMe said:Mercury has a high vapour
pressure, and was used in mercury vapour rectifiers
http://www.bvws.org.uk/405alive/tech/safety.html
I especially like the radioactive turntable....
bob
Mike said:http://en.wikipedia.org/wiki/Mercury_arc_rectifier
There's some fantastic photos of those on the web. I don't care how
safe they are; I'd be very reluctant to go near one, operating or not.
Adrian C said:The last one on this page looks like a ghost ...