Improper way the express resistance?

[theAnonymous1]

Thanks for that reference Seeker.

I'll be honest and say I picked up the habit from this forum. This is where it all started for me 6 years ago, so my mind was open to pick up those sort of things without questioning them.

I probably have all the Europeans here to blame.

[AndrewT]

Originally Posted by nigelwright7557

It is much better to use the R as a decimal point as a dot can be missed easily.

and you must never omit the leading zero in <1 values.

[TheSeekerr]

Indeed - that's something that particularly gets on my nerves.

BAD: .47 ohms
Good: 0.47 ohms
Concise: 0R47

Note that in EE we don't just do this with resistors - we'll do it with inductors and capacitors, too, using the multiplier as the decimal place with the units implied.

ie. a 1u5 capacitor, or an 0m8 inductor.

It can be faster to say, too - despite the excerpt I posted above warning to the contrary, it's not uncommon to request a "One Kay Five resistor". Only common with resistors, although a particularly awful lab might wear me down to the point of asking for a "four mu seven 'lytic"

[Enzo]

mm or mmf or uuf.

yeah, when I was learning we didn;t use picofarads. "Pico" was just a word in the list along with femto and other odd prefixes no one but scientists used - at least at the time. SO we use micro-microfarad. It was mmf at first, then that fancy mu symbol came along and it became uuf. So 22mmf was indeed 22pf. Those clever ham radio boys referred to the mm as "mickey mouse," as in a "22 mickey mouse cap." I guess it sounded good on 20 meter sideband.

I see old schematics with caps labelled as mmf and mf. These days mf would mean millifarad. In 1959 there were no caps measured in millifarads.

Yes, the 1k5 format is more common in Europe than it is in the USA.