"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

"Antonio Vernucci" wrote in message
...
"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

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

- in the 60ies it was fairly common to use kpF (kilopicofarad) to mean nF
(nanofarad)

Never saw that before.


it was not just on the doagrams. I have some capacitors marked that way...

73

Tony I0JX