none 

Statements about this table:
the tube with audio amp of x be 4 / 4 / 5 (standard) / 6
the det / pre - amp with 4 tube and a rectifier of x x
for det / pre - amp of x x (push - pull) the rectifier be (selenium)
the audio amp of x x (push - pull) have 4 / 4 / 5 (standard) / 6 tube
tubes
converter
det / pre - amp
audio amp
rectifier
4
x
x
x
x
4
x
x
x
(selenium)
5 (standard)
x
x
x
x
6
x
x
x
x
tubes
converter
det / pre - amp
audio amp
rectifier
6
x
x
x x (push - pull)
x
8
x
x x (push - pull)
x x (push - pull)
x
8
x
x
x x (push - pull)
x