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Electronic Valve - Philips, Dual triode, Type 6BQ7A, 1962 Object Reg. No: ST 032585

Designed for use as a cascode amplifier in television tuners. Known as ECC180 in Europe.
The cascode circuit uses two triodes with one as a common cathode stage feeding the other as a grounded grid stage. The cathode of the second stage is connected directly to the anode of the first stage so that the two triodes are in series.
The main advantage of the cascode circuit is that it gives the low noise of a triode without the need for neutralisation.
Manufacturer: Philips, Hendon South Australia
Tubular glass bulb with exhaust tip and 9 pin miniature base.
Acquisition Information:
Unknown from Unknown, 1981
Discipline: Technology
Dimensions: 55 mm (Length), 20 mm (Diameter)

More information

Tagged with: thermionic electron valves, 6bq7a
Themes this item is part of: Engineering Collection, Information & Communication Collection
Primary Classification: ELECTRONICS
Secondary Classification: Vacuum Technology
Tertiary Classification: amplification
Inscriptions: Bulb: 6BQ7A/Miniwatt/MADE IN AUSTRALIA/ODC21
Paper label on bulb: 6BQ7A
Manufacturer: Philips Electrical Industries Pty. Ltd., Hendon, South Australia, Australia, 1962

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