ecc83 Philips Monza D getter foil slanted 45 degrees 2X tubes

code 2Z 58 between pins

probably mC2 as per inner structure
long plate 17mm
dark grey plate
getter welded

fully tested 48/50 ; 48/37 ( good at 32/32 ) on tube tester calibrated TV7D/U

U FOIL D GETTER SLANTED 45 DEGREES DIMPLED, PPRODUCTION CODE 2Z 58 BETWEEN PINS
17MM LOMG PLATE 
RIBBED PLATE 
DARK GREY PLATE 
COPPER RODS 
HIGH QUALITY VINTAGE TUBES 

ECC83 Double Triode  Audio Frequency High Gain
ECC83 = 12AX7 = B339 = 95-127-01 = 6L13 = CM1 = ECC83S b759 e83cc
Similar Tubes  Normally replaceable-slightly different:   0AX7 ; 12AX7A ; CV492 ; E2164
Other class quality (otherwise equal):   7025 ; CV4004 ; E83CC ; M8137
Other characteristic (electr. data):   12AY7 ; 6N4_China
Other base and other heater:   6EU7 ; ECC808
Multiple differences or of other kind:   5751 ; 7729
Successor Tubes 1963   ECC808   5751WA  
Base Noval B9A
Filament Heater Vf 12.6 Volts / If 0.15 Ampere / Indirect / Parallel / series AC/DC


BOX 132