The 12BY7A is a video amplifier output valve designed for boosting wideband TV video signals to a sufficiently high level to be transmitted over a considerable length of cable without loss of quality.
The heater is rated for 12.6 volt use and is centre tapped. Makers describe the 12BY7A as a pentode but the construction is as a beam tetrode.
The 12BY7A was widely used by radio amateurs in the 1960's and 1970's as a driver stage for a pair of 6146B tetrodes in the PA (final stage) of HF transmitters up to 30 MHz.
Interchangeable with EL180, 12BY7, 7733, 12DQ7, 12BV7. Usually GE JANor RCA, we have also other USA manufacturers.
MADE IN USA
