[NJARC] Western Electric 215A "Peanut" Tube

[Al Klase]

Joe,

According to Tyne's "Saga of the Vacuum Tube", the 215A, 
originally known as Type N was developed for the U.S. Army. 
  The intent was to consume the lowest possible filament 
power for use in battery-powered "trench sets."  These were 
introduced late in 1919.  So, these were portable radio 
tubes from the git-go.

Regards,
Al

Yardleyite at aol.com wrote:

> Dear Fellow NJARC Members,
>                                             I was wondering if anyone knew 
> what the original applications for the Western  Electric 215A "peanut" tube was 
> and why it was originally produced?
-- 
Al Klase - N3FRQ
skywaves at webex.net
Flemington, NJ 08822
Web Page:  http://www.webex.net/~skywaves/home.htm