Vacuum Tube - 13DE7, Triode, Dissimilar Double
New-Old-Stock (NOS) tube.
The 13DE7 is a miniature double triode in the 9-pin miniature construction. Section #1 is intended for use as a vertical deflection oscillator having medium mu and section #2 is intended for use as a vertical deflection amplifier with lo mu. Thermal characteristics of the heater are controlled such that heater voltage surges during the warm-up cycle are minimized provided it is used with other types which are similarly controlled. Except for heater characteristics and ratings, the 13DE7 is identical to the 10DE7.