2x E88CC SIEMENS & HALSKE CODE A6 6I & PHILIPS MULLARD CODE 30K Tube ~ CCa Triode 32221

TEST TUBE 1 SIEMENS & HALSKE = 60/60 (WHERE 50 = 100%) CODE A6 6I

TEST TUBE 2 PHILIPS MULLARD = 55/65 (WHERE 50 = 100%) 30K

TUBES TESTED WITH TUBE TESTER TYPE TV7 D/U WITH SETTINGS OF 6922 TUBE EXCELLENT TUBES FOR DRIVER STAGES & PREAMPLIFIERS

tube valve lampe röhre tsf 真空管 HAM RADIO audio hi-end hi-fi diy POWER AMPLIFIER Pre-Amplifier Preamp Pri VINTAGE stereo SE Single Ended PP Push-Pull VACUUM TUBES röhren

box 41