Virtual Valve Museum
Virtual Valve Museum | search:
About the museumMuseum exhibitsUpdates, new exhibits etc.EquipmentSupporters
View the guestbookDocumentsValves wanted!Valves for sale or for tradeLinks to other sites, suppliers etc.

MOV R type triode

Size
 This valve measures 115x53mm overall and has a 4 pin base

Unfortunately this valve has a broken filament and base pn. The colouring on the glass is typically from the use of a phosphorous getter. It is a Marconi Osram Valve 'R' type, labelled BBC and R9089.

Filament voltage4V
Filament current650mA
Mutual conductance0.225 at Va=100V
Amplification factor9
Anode impedance40k ohms

inside view 		R type

This file was last modified10:49:34, Sunday December 11, 2011