Chuck Guzis wrote:
Were these the special "space charge" tubes?
e.g. 12J8, 12U7, 12DK7, 12DL8, 12CX6, 12DE8, 12CN5, 12BL6, 12DS7,
12AC6, 12AD6, 12AE6, 12AE7, 12AF6, 12AJ6 or 12AL8 (I've probably
left out a few)?
Yes, that's some of them. There were 41 types.