1966 Epiphone amp catalog http://www.vintageguitars.org.uk/resources.php

Epiphone schematics


Reviews are at Harmony Central

Image left taken by Jedistar Chicago Music Exchange 2008:

Epiphone Electar  amplifier control panel  Epiphone Electra  amplifier control panel

Epiphone Electar Model M were made 1936 to 1939 in USA. Pre-War Epiphone amplifiers were reportedly built by Nate Daniels, later of Danelectro fame. [Source and images courtesy of Enzo Puliti, email 25/2/2012]