Message-ID: <3.0.1.16.20000508134030.12ef527e@mail.cc.kuleuven.ac.be>
Date: Mon, 08 May 2000 13:40:30
To: rsgb_lf_group@blacksheep.org
From: "Rik Strobbe" <rik.strobbe@fys.kuleuven.ac.be>
Subject: Re: LF: Terms
In-reply-to: <000001bfb8dc$17793ac0$4044b28f@w8k3f0>
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1; format=flowed
Content-Transfer-Encoding: 8bit
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org
Sender: <majordom@post.thorcom.com>

The 'rules' (as they were learned to me when I was an eng. student, back in
the late 70's) were :
- no space between the figure and unit when the unit is abbrevated (so
136.5kHz)
- abbrevated units in capital otherwise not (so 12V and 12 volt)
- no multiples for units (so volt, ampére, watt, not volts, ampéres, watts)
- RF, LF, IF etc : in capitals without dots

BTW : terms LF, HF ,RF, IF etc... are mixed up frequently :

RF = radio frequency (regardless of the exact frequency)
IF = intermediate frequency (idem dito)
So a receiver can have a RF of 136kHz and an IF of 70MHz.

Frequency ranges :
VLF = 3kHz - 30kHz (very low frequencies)
LF = 30kHz - 300kHz (low frequencies)
MF = 300kHz - 3MHz (medium frequencies)
HF = 3MHz - 30MHz (high frequencies)
VHF = 30MHz - 300MHz (very high frequencies)
UHF = 300MHz - 3GHz (ultra high frequencies)
SHF = 3GHz - 30GHz (super high frequencies)

So despite what one often reads both the 73kHz and 136kHz ham bands are LF
and not VLF.

At 12:54 8/05/00 +0200, you wrote:
>To All from PA0SE
>
>On my question about the proper way of writing units in English/American I
>received the following reply from the Editor of RadCom.
>
>73, Dick, PA0SE
>
>
>Hello, Dick.
>
>It is RadCom style to use the following:
>
>10V or 10 volt(s), 5A or 5 amp(s), 2W or 2 watt(s).
>With IF, RF and AF, capital letters and no dots.
>With frequency, no gap between the number and the units, ie
>800Hz, 136kHz, 21MHz.
>
>Steve White, G3ZVW
>
>
>
>> In The Netherlands we write 5 A, but 5 ampère, 10 V but 10 volt. So in
>> general the unit is written with a capital when abbreviated but with a
>>lower case when written in full. And with a space between figure and unit.
>>
>> What is correct in English or American, 3 V or 3V?.  Same question for 10
>> amp, 10amp, 10Amp, 10Amps?, etc.
>>
>> And what about rf or RF? if, IF, i.f. or I.F. (intermediate frequency)
>>etc.?
>
>>
>> 73, Dick, PA0SE
>
>
>
>
>
>
>