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> L63 6J5 triode mullard napl suit PX4 PX25 KT66 amps X2
L63 6J5 triode mullard napl suit PX4 PX25 KT66 amps X2
L63 6J5 triode Mullard NAPL suit PX4 PX25 KT66 amps x2
This is another pair of rare yellow NAPL Mullard L63 fully tested circa late 1940's. 6J5G on base with coded 10E/348. Special ST fat shape for these triode used in input stage of amplifiers namely push pull PX25 or PX4 such as Decca Beau. The testing of a good L63 start from 7mA then we have: L63 (1) 10mA; L63 (2 ) 10mA; Thanks for watching
