ECC33 röhre MULLARD TUBE 6SN7 BRITISH roehre vorverstärker
B65 33S30 PREAMP PREAMPLIFIER PRE AMP
BLACK BASE Blackburn B65 33S30 6SN7GT 6SN7GTB 6SN7
TWIN TRIODE DOUBLE OLDEST PRODUCTION DOME
GREY PLATES SMOOTH PLATES LARGE PAN GETTER WITH CUP WELDED
LEGENDARY TUBE BRITISH MADE VALVE PERFECT FOR PRE-AMPLIFIER HI-END
USED TUBE TESTED WITH TUBE TESTER TV7D/U CALIBRATED
TEST RESULTS AS FOLLOW
TRIODE 1 = 92 ; TRIODE 2 = 86
( REFERENCE GOOD ON TV7D/U CALIBRATED IS 50 /50 )
Socket Octal K8A
Filament Heater Vf 6.3 Volt / If 0.6 Ampere / Indirect / Parallel, ~ = (AC/DC)
tube valve lampe röhre tsf 진공관 真空管 HAM RADIO audio hi-end hi-fi diy POWER AMPLIFIER roehre Pre-Amplifier Preamp Pri VINTAGE stereo SE Single Ended PP Push-Pull VACUUM TUBES röhren
box 50