Chinese Shuguang Natural Sound KT88-T.
The carbon-sprayed black glass Natural Sound series is better than the treasure series, packing with gift box
KT88 is a beam power tetreode, its anode limited dissipation power is 42W. In the audio amplifier, the power can be 100W when it is used as push-pull class AB1 with double tubes, it can also be used in electronic voltage regulator circuit. KT88 is similar with CV5220 and 6550,they can be replaced by each other.