Tung-Sol KT120
Tung-Sol KT120, which has a plate dissipation of 60 watts,
making it the most powerful tube in the 6550/KT88/KT90 family.
A pair of these tubes in push-pull configuration can deliver power levels of 150 or more watts.
Due to its huge glass the KT120 is more sensitive to microphonics than other KT types and hence not recommendet for guitar- or bass combo amps!
