Space Charge Type Dual Dissimilar Triodes for Audio
Consist of a Medium-Mu and Low-Mu Triode
Black Plates, Halo Plate Getter, Copper Grid Posts
9 Pin Miniature
Intended for Hybrid Amplifiers in Cars Back in the Day
Med-Mu Triode is for General Purpose and Low-Mu as Driver for Transistor Power Amp
Triode 1 - Amplification Factor 13
Triode 2 - Amplification Factor 6.4
Not for use in any guitar amp. This is a car radio tube and uses 12VDC for the heaters.
Not to mention that the amplification factor is shit.