FREQUENCIES


Home


Wireless (pre-1920) Radios


Marconi Wireless (pre-1920) Sets


Tubes & Valves


Crystal Set Radios


Antique Radios (1920s)


Antique Radios (1930-1960s)


Antique Radio Advertising


Radio Speakers & Microphones


Articles on Antique Radio I Have Written


Radios for sale


Wanted Radios


Tubes for sale


Tube Amplifiers


Defeating Depression book by Howard Stone


Interview of Howard Stone on Tube Talk Classic Radio Show


Early Books and Literature on Radio, Tubes, & Electricity


Contact Me


Tubular Audiotron Tubes for Radios from 1915
Three Tubular Audiotron Tubes. Each has one good filament. Both have long leads which is not very common. A (the one left) is a Cunningham with both the instruction sheet that came with the tube but also the mounting brackets for attaching to the front panel of a radio. B (the middle one in the picture) is another Cunningham Tubular Audiotron Tubes from 1915. Not all Cunningham tubes had a label but this one has one. C is an ER tubular tube made by Moorhead.

Unless otherwise noted, all materials contained on this web site are copyright protected. Materials may be downloaded and/or reprinted for personal use only. Permission to reprint or electronically reproduce any document or graphic in whole or in part for any non-personal or commercial use is expressly prohibited unless prior written consent is obtained from the respective copyright holder(s).

Copyright 2003-2004 Howard Stone PhD.
stonevintageradio@gmail.com