6CZ5 RCA black plate short bottle used/good 1960 era (48ma) Title: 6CZ5

6CZ5 RCA black plate short bottle used/good 1960 era in WB

48ma

Gm=4350

(you cannot sub a 6CZ5 for a 6973, see 6973 for more details)

Good used mA = 40ma+

Good used Gm = 4200+

– Beam Power Tube