Vacuum Tube - 6BQ7A / 6BZ7, Dual Triode
New-Old-Stock (NOS) tube.
The 6BQ7A is a miniature, medium-mu twin triode primarily designed for use as a cascode, radio-frequency amplifier in very high frequency television tuners. In this application, its performance is characterized by high gain and low noise figure. An internal shield provides isolation between the two triode sections.
Except for heater ratings, the 6BQ7A is identical to the 4BQ7A and the 5BQ7A.