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Odd resistors identification
In message , olfart
writes "Antonio Vernucci" wrote in message t... "Bob Smits" ha scritto nel messaggio news:HbmdncivItyZOM7RnZ2dnUVZ_uqdnZ2d@islandhostin g.com... Edmund H. Ramm wrote: In "Antonio Vernucci" writes: [...] I have a diagram dated 1953 in which M still represents 1000. In that diagram they use MF for microfarad [...] There are also diagrams where m (milli, 10^-3) is used to represent mikro (10^-6). Even worse and confusing are those, where mmF gets used when pF (pico, 10^-12) is meant. Huh? What's confusing about micro-micro farads? :-):-) -- Robert (Bob) Smits, VE7HS & Linux Fan Among the odd markings: - in the 60ies it was fairly common to use kpF (kilopicofarad) to mean nF (nanofarad) - in the 30ies, German power mica capacitors were marked in centimeters (cm). 1 cm is equal to about 1.1 pF 73 Tony I0JX and cps instead of Hertz Ah...those were the good ol' days But cps and c/s are still valid and understandable units of frequency. If I recall correctly, when it was first proposed that we use the 'continental' Hertz, the Hz was supposed to be only for electrical units. Therefore, the electrical drive to a loudspeaker would be in Hz, but the movement of the cone would be in c/s. -- Ian |
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