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6BD4

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ID = 4632
       
Country:
United States of America (USA)
Brand: General Electric Co. (GE); Bridgeport CT, Syracuse NY
Tube type:  Sharp cutoff beam triode   Power-supply 
Identical to 6BD4
Similar Tubes
Different maximum ratings:
  6BD4A

Base Octal (Int.Octal, IO) K8A, USA 1935 Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If 0.6 Ampere / Indirect / Specified voltage AC/DC
Description

Early high voltage shunt regulator for television applications.
Plate dissipation power = 20 Watt; max. plate volts = 20,000; max. unregulated power supply voltage =40,000; max. DC plate current = 1.5 mA.

The 6BD4 was only used in the very early color sets like the RCA CT-100 chassis as well as the Westinghouse H840CK15. It was replaced by the 6BK4 and derivatives, which dominated the market until the advent of pulse regulators in the late 1960s. The leaded glass construction is needed because the tubes emit soft X-rays during normal operation, and are installed inside a shielded compartment on a TV chassis. It is common to see used tubes that have turned a dark brown color due to X-ray and electron bombardment of the glass over years of operation.
These tubes saw also few applications outside of color TV sets, e.g. in ion implanters for semiconductor manufacturing.
[Text from Bob Weiss N2IXK]

 
Text in other languages (may differ)
Information source Essential Characteristics, GE 1973   

6bd4_schematic.png
6BD4: Mia raccolta schemi.
Pier Antonio Aluffi

6bd4_so.png 6BD4: ARRL Handbook 1972
Anonymous 10 Collector


Just Qvigstad
6bd4_characteristics.png
6BD4: My schematic collection.
Pier Antonio Aluffi

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Usage in Models 1= 1955?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1
 

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