[ARC5] More Condenser/Capacitor Trivia

[Richard Knoppow]

    Well, I didn't have to look very far. See:
https://en.wikipedia.org/wiki/Jar_%28unit%29



On 2/21/2016 8:54 PM, Leslie Smith wrote:
>                                    Units of capacitance.
>
> The (rather small) library at Westlakes Amateur Radio Club has a book
> published by the British Navy - aka "The Admiralty".
> In the discussion of "condensers" it gives the unit of capacitance as
> "the jar".
> I have no idea about the relationship between this unit and the Farad
> (or micro-Farad).
>
> I understand the idea of "condenser" comes from the understanding that
> radio waves must travel in a medium, and that "the medium", (the ether)
> could be trapped (or condensed).  This notion of "trapping" the ether in
> a vessel (a condenser) led to the name.  This is an interesting concept!
>
> I will read further postings on this topic with interest, since all
> "command" radios have many "condensers", some variable.
>
> Further, I'd like to point out to all the other list readers that the
> Westlakes Radio Club MUST be an excellent organization - to have such an
> authoritative book in the club library.   Our club lies on the Western
> side of Lake Macquarie, hence the name.  Visitors to the region will be
> welcome at the club.
>
>     73 to all (including those who have condensers in their radios etc)
>     de Les Smith
>     vk2bcu at operamail.com
>
>                            R   ж-ж-ж             и-и-и             ж-ж-ж
>                             Я
>
> On Mon, Feb 22, 2016, at 13:11, Dennis DuVall wrote:
>> Did a quick check in my library.  They were “condensers" in Terman’s 1937
>> edition.  The RCA "Radiation Designer’s Handbook" used both terms in it’s
>> 1941 edition.  My college “Radio Electronics” textbook (1956) used
>> “capacitor.”  The ARRL Handbooks were still using “condenser" in 1952 but
>> had switched to “capacitor” by 1960.  "The Radio Handbook"  (Editors and
>> Engineers), however,  was using  “capacitor” as early as 1947.
>>
>> Dennis D.  W7QHO
>> Glendale, CA
>>
>> ***************
>>
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-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL

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