|
Total primary load (KT66/807/PX25): |
10000
|
Ohm a-a /2Rk=305Ohm@438V/60Vp-p drive/Put=250X0.11/2=14W |
|
Total primary load (KT88/6550): |
5000
|
Ohm a-a /2Rk=430Ohm@443V/70Vp-p drive/Put=250X0.2/2=25W |
|
Total primary load (300B): |
5000
|
Ohm a-a /2Rk=800Ohm@480V/110Vp-pdrive/Put=250X0.2/2=25W |
|
Total primary load (6C33): |
2400
|
Ohm a-a /2Rk=550Ohm@410V/160Vp-p drive/Put=240X0.4/2=48W |
|
Total primary load (845): |
14000
|
Ohm a-a/2Rk=1.6kOhm@960V/180Vp-p drive/Put=520X0.15/2=39W |
|
Impedance matching: |
|
|
|
|
|
|
|
|
connection
|
U0
|
prim.load
|
Rl(S1&S2)
|
Rl(S3&S4)
|
Rl(S5&S6)
|
opt.load
|
sec.load
|
tube.type
|
|
(S1+S3)//(S2+S4) |
9.83
|
10000
|
2.25
|
2.32
|
1.43
|
4.57
|
4
|
KT66/807 |
|
S1+S5 |
12.40
|
10000
|
2.25
|
2.32
|
1.43
|
7.27
|
6
|
KT66/807 |
|
S1+S2 |
13.80
|
10000
|
2.25
|
2.32
|
1.43
|
9.00
|
8
|
KT66/807 |
|
S1+S2 |
13.80
|
5000
|
1.13
|
1.16
|
0.71
|
4.50
|
4
|
KT88 |
|
S1+S5+S6 |
17.90
|
5000
|
1.13
|
1.16
|
0.71
|
7.57
|
6
|
KT88 |
|
S1+S2+S5 |
19.30
|
5000
|
1.13
|
1.16
|
0.71
|
8.80
|
8
|
KT88 |
|
S1+S2 |
13.80
|
5000
|
1.13
|
1.16
|
0.71
|
4.50
|
4
|
300B |
|
S1+S5+S6 |
17.90
|
5000
|
1.13
|
1.16
|
0.71
|
7.57
|
6
|
300B |
|
S1+S2+S5 |
19.30
|
5000
|
1.13
|
1.16
|
0.71
|
8.80
|
8
|
300B |
|
S1+S2+S5 |
19.30
|
2400
|
0.54
|
0.56
|
0.34
|
4.22
|
4
|
6C33 |
|
S1+S2+S5+S6 |
24.80
|
2400
|
0.54
|
0.56
|
0.34
|
6.98
|
6
|
6C33 |
|
S1+S2+S3+S4 |
27.80
|
2400
|
0.54
|
0.56
|
0.34
|
8.77
|
8
|
6C33 |
|
S1+S3+S4 |
20.90
|
14000
|
0.44
|
0.46
|
0.28
|
4.07
|
4
|
GE845 |
|
S1+S2+S3+S4 |
27.80
|
14000
|
0.44
|
0.46
|
0.28
|
7.20
|
6
|
GE845 |
|
S1-3+S5-6 |
31.80
|
14000
|
0.44
|
0.46
|
0.28
|
9.42
|
8
|
GE845 |
6 Ohm load generally not optimized (substraction may also be used).
Optimum load is generally higher than used load. This is due to excessive
loss in this transformer prototype.Using the UL-feature, generally doubles
plate resistance while optimum plate load is approximately the same.