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

[Richard Knoppow]

    These are derived from the roots of Greek numbers. See
http://www-groups.dcs.st-and.ac.uk/history/HistTopics/Greek_numbers.html

The letters used for Roman numerals do not appear to stand for anything. 
They may have been derived from hand (i.e. finger) counting.

On 2/14/2016 2:00 PM, Mike Feher wrote:
>
> 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 <http://www.navy-radio.com>
>
> On Sun, Feb 14, 2016 at 4:43 PM, <hwhall at compuserve.com 
> <mailto: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 
> <mailto:1oldlens1 at ix.netcom.com>>
> To: arc5 <arc5 at mailman.qth.net <mailto: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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-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL

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