I accidently bought 2,000 of those two months ago but, sent them back in
exchange for the plastic version since they are $0.15 ea. cheaper.  If
somebody wants some I know where to find them. Call Advanced Mili Technology
949 481 5435

Jeff

-----Original Message-----
From: Jones Beene [mailto:[EMAIL PROTECTED] 
Sent: Wednesday, December 19, 2007 4:30 PM
To: vortex
Subject: [Vo]:Kick the can

Below is a childish question, but first as a
hide-and-seek lead-in to that, there is also a
provocative and largely neglected old page on the JNL
site:

http://jlnlabs.online.fr/cnr/negosc.htm

This page concerns an unacknowledged feature (not
mentioned by the manufacturer) of a certain
transistor, operating *in reverse mode* as a NDR
oscillator.

The Negative Differential Resistance (NDR) effect is
seen in other devices like the Gunn diode and even the
fluorescent tube, but is NOT normally even close to an
overall overunity effect (sorry) ... at least not in
isolation; and the net effect of any part with an NDR
range is still lossy, especially for circuits with one
or a few parts... 

...but yet on a deeper level: this device does not
seem to agree with the basic premise of Ohm's Law,
which makes one wonder why it is a "law" and not a
hypothesis. 

According to the Ohm's law, an increase of voltage
should produce an increase in current. In this 'case'
(pun intended), and in the negative resistance region
of the 2N222A curve, an increase of the voltage
produces a decrease of the current, but only when in a
can. Yawn....

Some few have recognized that within its narrow range
of voltage, *NDR is a kind of RTS* or even better, but
the inverse situation is what is most provocative.

Wow - NDR = RTS ! How is that for matching
arcane-acronyms? BTW -- RTS = room temperature
superconductivity.

The 2N2222A is an older NPN bipolar part and usually
found only in the TO-92 (plastic) case, but which is
still to be found on occasion on eBay in 'a can' (like
poor Prince Albert) designated as the TO-18 part ... 

... not sure if it is still in production: that is, in
production in the metal can instead of the plastic
potting, which is much cheaper to make.

*Only* the metal can works in reverse mode as a
"negistor". Bizarro! Don't know if this is relevant to
the $64 question, but  the TO-18 is a much smaller
part than the TO-92.

OK Here is what you have been waiting for: the
aforementioned $64 question: 

Why is only the 2N2222A in the TO-18 can functioning
in the NDR range, and not the very same part in a
plastic case !?!

Jones

Any good answer will result in a bequest in my will
for at least $64... and that might be forthcoming
sooner rather than later ;-) ... thanks to such
imponderable and childish mind-benders as: how does
'kick the can' ends up in a semiconductor
discussion...



No virus found in this incoming message.
Checked by AVG Free Edition. 
Version: 7.5.503 / Virus Database: 269.17.4/1189 - Release Date: 12/18/2007
9:40 PM
 

No virus found in this outgoing message.
Checked by AVG Free Edition. 
Version: 7.5.503 / Virus Database: 269.17.4/1189 - Release Date: 12/18/2007
9:40 PM
 

Reply via email to