[Amps] Help identifying tubes

[N7KA at comcast.net]

Take the guess work out of the equation.  Here is a site that provides good info and EIMAC datasheets.  Pay attention to the tube diagram pinout (especially pins 2 & 4) and physical dimensions. 



http://www.g8wrb.org/complete-list.php 


Arne N7KA 

----- "mike stokes" <mike9v at gmail.com> wrote: 



Arne N7KA 

----- "mike stokes" <mike9v at gmail.com> wrote: 


Hi Guys 
Someone gave me 2 tubes years ago and said they were 3-500s.  Well I am not 
sure they really knew, and I don't know as the lettering is worn off.  Here 
is a link with some pics. 
http://picasaweb.google.com/mike9v/Tubes# 
The one on the left is an Eimac.  It end in an A and has S4    7704 stamped 
inside. 
The one on the right is a Westinghouse and looks like it says 5/5xxA where 
the x in worn and illegible. 
Any ideas on what these really are ?  Or what is a good way to figure it out 
? 
Any help is appreciated.