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> L63 6J5 triode osram marconi suit PX4 PX25 KT66 amps X4
L63 6J5 triode osram marconi suit PX4 PX25 KT66 amps X4
L63 6J5 triode Osram Marconi suit PX4 PX25 KT66 amps x4
Nice lot of 4 pieces fully tested L63 triodes made by Marconi Osram MOV circa late 1940's. 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) 9.5mA; L63 (2 ) 10mA; L63 (3) 7.5mA; L63 (4) 10mA. Thanks for watching
