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Marconi Osram MPT4 catkin

Audio Output Pentode

Marconi Osram MPT4 catkin
Marconi Osram MPT4 catkin

Designed in 1933, this is a series one catkin. See the article at the National Valve Museum or this one at the Virtual Valve Museum for details of the short lived catkin design.

© Andy Cowley, 2005-2012     Home

This page last modified by AJC on Monday, 29-Mar-2010