E180CC MULLARD IBM TUBE QUAD

4 TUBES = 4 VALVES = 4 VINTAGE VACUUM TUBES = 4 röhren

BOX PLATE RIBBED
GREY ANODE
O GETTER HALO
DELTA CODES
YEAR 1961

Fully tested with tube tester TV7D/U calibrated, test results 52/50  ; 52/46 ; 44/44 ; 49/38  on tv7D/U calibrated ( 33/33 is reference good on this military tube tester )

Tube type:  Double Triode FOR PRE AMPLIFIER PREAMP PHONO INPUT DRIVER STAGE AUDIO
E180CC = 7062 = CV8431
Similar Tubes Other class quality (otherwise equal):   5965
Base Noval B9A
Filament Vf 6.3 Volts / If 0.4 Ampere / Indirect / Parallel / series AC/DC
Description Heater centre tapped - tube can be operated at 12.6V 0.2A.
For computer use - can be operated under cut-off conditions for long periods without loss of characteristics.

BOX 69