uv199.com

Early Vacuum Tube Manufacturers


'Encyclopedia Amplifica'


An A-to-Z encyclopedia

dedicated to collecting

201 amplifier tubes



Research Sources





The hunt for illegal tube factories



Moorhead Laboratories Logo

A tribute to the persistent innovation of the employees of Moorhead Laboratories




H
i
s
t
o
r
y

Early Family History

Navy Connections

PPIE in his backyard

Married Life

A period of Struggle

Accidental Death






T
u
b
e
s


Tubular designs

War production

Atlantic-Pacific Sales

Rectification

Custom Work

late A-P triodes 

Producing the QRS 'Red-Top'


Moorhead Laboratories in the media

144 images so far

1915 - 1916

1917 - 1918 - 1919 

1920 - 1921 - 1922

1923 - 1924 - 1925