[ARC5] More Condenser/Capacitor Trivia

[Leslie Smith]

                                  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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