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Marconi Osram 'catkin'

Vari-mu Tetrode

Marconi Osram 'catkin'
Marconi Osram '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. This valve has lost its top contact. It is possibly a VMS4B but no markings are visible.

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