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ID = 49493
United States of America (USA)
Brand: Hughes Aircraft Co.; Los Angeles, CA
Tube type:  Storage Oscilloscope CRT 
Identical to Memotron = 6498
First year 07.Mar.1955 Tube Lore (I)

Base Diheptal (14 pin glass U14)
Filament Vf 6.3 Volts
Description 5" storage CRT. 14-pin base plus 6 side caps. Double gun, the indirectly heated writing cathode is typically biased at -2600V, while the half-indirect refresh flooding cathode is at ground potential.
6498 is the RMA registered code for the proprietary Memotron name. 
Information source - - Manufacturers Literature   Mod. 104-D Memoscope manual
Tube Lore (I)   
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Memotron: Private collection
Emilio Ciardiello

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