That is funny, I once read an old scientific paper where they talked
about capacities measured in centimeters and I was very confused because
I am used to SI. Then I remembered the formula to calculate the capacity
(you know, C = e0*e*A/d) and thought: Hey, they might be using a system
where the e0 is set to unity, and so it was... ;-)
Jens
I have an old 'condenser' marked in cm [centimetre/centimeter].
One recent doc explaining this early use of centimeter ...
http://web.mit.edu/sahughes/www/8.022/lec06.pdf
"In cgs units, we measure charge in esu and potential in esu/cm. The
unit of capacitance is thus just the centimeter!"
jk
----- Original Message ----- From: "John Rehwinkel" <[email protected]>
To: <[email protected]>
Sent: Thursday, July 05, 2012 3:46 AM
Subject: Re: [neonixie-l] Nixie thermometer in Elektor journal
...clip.....
Agreed! As I got into electronics at an early age, I was already
familiar with the prefixes (pico, micro, milli, kilo, mega, and so
forth). For some
reason, "nano" seemed to get left out for a while (as "pico" did, back
in the days when a 200pf capacitor would be referred to as a "200mmf
condenser").
....clip....
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