These ten Philco engraved / hot-stamped-base type / number 41 tubes tested as follows on our Paul Hart-calibrated TV7/U:
52, 54, 54, 54 54, 54, 55, 58, 58 and 62 where minimum (65%) is 40 and 100% is 62.
These ten Philco engraved / hot-stamped-base type / number 41 tubes tested as follows on our Paul Hart-calibrated TV7/U:
52, 54, 54, 54 54, 54, 55, 58, 58 and 62 where minimum (65%) is 40 and 100% is 62.