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REL5

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ID = 34237
       
Country:
Canada
Brand: Research Enterprises Ltd., Toronto
Tube type:  Transmitting Triode, air cooled 
Identical to REL5 = 10E/224 = VT98_GB = CV1098 = WL-533
Predecessor Tubes VT58  

Base Sidecontact.
Was used by Radar
Filament Vf 8.25 Volts / If 35 Ampere / Direct
Description

Copper-glass transmitting triode, used as pulsed oscillator in radar applications. Copper anode, side connections to grid; thoriated-tungsten filament.

Two tubes gave 30 kW pulses at 200 MHz.

Tubes were the exact copy of the GEC VT98 and some samples carried the double marking REL5 / VT98. The main difference was in the finned anode radiator instead of the drilled block of the British predecessor Made in Canada by Westinghouse for the CHL radar system built at REL and installed to control the Panama Channel.

Also made by US Westinghouse as WL-533.

The sample in the photos shows the double marking REL-5 / CV98, which means that the two types were exactly equivalent. The filament data given by Sibley, 12,6V at 58A are then wrong, probably referred to the old CV58 fitted with pure tungsten filament.

 
Information source Tube Lore (I)   
-- Original-techn. papers.   
 
rel5_vt98_1.jpg
REL5: Private collection
Emilio Ciardiello

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