Great tube manufactured on Blackburn UK , good tube for POWER SUPPLY on audio application.

TV7A/U SETUP AND VALUE RESULTS:

PLATE 1: JS0-6000 BIAS 0  SHUNT 70 RANGE A PRESS 3 MIN. VALUE 40 = 66

PLATE 2: JS0-4000 BIAS 0  SHUNT 70 RANGE A PRESS 3 MIN. VALUE 40 = 68

QUICK TEST ON OUR HOME MADE AMPLIFIER AND PREAMPLIFIER LIKE IN PHOTO:

SE VT-100 / 807 10W "A" CLASS

SRPP 6SN7GTB PHILIPS-MINIWATT