10 Philco Number / Type 41 #41 Vacuum Tubes Engraved / Hot-Stamped Bases Lot Of Ten Beverly Sills The four new old stock

The four new old stock

There were no shorts or gas and they test as follows:

dimpled-sheet getters and two additional support rods per tube for increased rigidity and lowered microphonics

new in box Triangle-A 1L4 tube tested to spec on our Paul Hart-calibrated TV7/U

new in box Philco 25CU6 / 25BQ6 / 25BQ6GTB tube -- and another just like it -- tested to spec on Paul Hart-calibrated TV7/U

10 Philco Number / Type 41 #41 Vacuum Tubes Engraved / Hot-Stamped Bases Lot Of Ten Beverly Sills The four new old stockThese 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.