čika Turner kaže ovako:
Tube type
Single Ended
Mode
Max
Pda
at idle,
Watts
Ea
+Vdc
a to k
Ia
mA
dc
Max
Audio
Power
Watts
Effici-
ency
%
Max
Eg2
g2
to k
Ig2
mA
dc
RL
for
max
PO
EL34, 6CA7
P, BT,
CFB,
Eg2 < Ea
24
24
24
420
350
270
57
68
88
10.3
9.8
9.3
43
41
39
270
270
270
7
8
9
6k6
4k7
2k8
EL34, 6CA7
UL, Eg2 = Ea
23
23
23
420
350
270
54
65
85
9.2
8.7
8.2
40
38
36
420
350
270
8
9
10
7k0
4k9
2k9