[ARC5] The BC-221 low frequency tank circuit puzzle.

[Mike Feher]

K is 1000 in kilograms kilometers etc.. and has been for a long time. 73 – Mike 

 

Mike B. Feher, N4FS

89 Arnold Blvd.

Howell, NJ, 07731

732-886-5960 

 

From: ARC5 [mailto:arc5-bounces at mailman.qth.net] On Behalf Of Nick England
Sent: Sunday, February 14, 2016 4:57 PM
To: Wayne Hall
Cc: ARC-5
Subject: Re: [ARC5] The BC-221 low frequency tank circuit puzzle.

 

M = 1000 in Roman numerals. Mille in Latin.

M or m is still commonly used in commercial pricing for 1000 items. 
Bottles $350/M for example. CPM = cost per 1000 ad impressions.

K for 1000 is relatively recent usage I think.

 

Nick England K4NYW

www.navy-radio.com

 

On Sun, Feb 14, 2016 at 4:43 PM, <hwhall at compuserve.com> wrote:

Could this be a French-inflicted unit abbreviation? :-)
Mille in Fracais is 1000.


Wayne
WB4OGM

-----Original Message-----
From: Richard Knoppow <1oldlens1 at ix.netcom.com>
To: arc5 <arc5 at mailman.qth.net>
Sent: Sun, Feb 14, 2016 12:38 pm
Subject: Re: [ARC5] The BC-221 low frequency tank circuit puzzle.

   Didn't see this when I posted, I was referring to the same thing. 

On 2/14/2016 7:57 AM, Glen Zook via ARC5 wrote:

When looking at schematics from the 1930s and even into the 1940s, for some reason, where the values of especially resistors are concerned, a number of manufacturers used an "m" instead of a "k" to indicate a multiplier of 1000.

 

 

 

The first time this happened to me, I started scratching my head trying to figure out why all the very high value resistors.  Then, I realized that the "m" was used instead of a "k".

 

 

 

Glen, K9STH 

 

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