6SELA Siemens / Klangfilm Output
Transformers |
|
|
|
|
|
|
|
The outstanding
quality of the Siemens / Klangfilm power amps results from the
employment of excellent parts of highest quality and stability.
Most output
transformers are oversized and use finest core materials.
Looking at the
different types the winners are the former ELA transformers for 100V
operation as many have 4 accessible interleaved windings, which lead
to a very extended frequency response and very low distortion.
Furthermore they also allow to be used in ultralinear operation or
with different interleaving combinations. |
|
|
|
|
|
|
Type |
Picture |
Found in |
orig. operation |
core size |
Comments and
Suggestions |
|
|
25 Watts Transformers |
|
|
|
|
 |
711092/
45/1668 |
 |
6SELA2524
(early versions)
|
25 watts
EL34 PP
-
400 Ohms |
EI
93x79
46mm |
Four secondary windings of 100 Ohms allow to wire the transformer
for 16-32 Ohms operation. This transformer delivers 25 watts of pure
sine wave output power into 16 Ohms in the original circuit. Great! |
|
 |
71919-
J92-A999 |
 |
6SELA2524
(later versions)
|
25 watts
EL34 PP
-
400 Ohms |
EI
93x79
46mm |
Four secondary windings of 100 Ohms allow to wire the transformer
for 16-32 Ohms operation. This transformer delivers 25 watts of pure
sine wave output power into 16 Ohms in the original circuit. Great! |
|
 |
714085
|
 |
6SELA2737
|
25 watts
EL34 PP
-
400 Ohms |
M85
36mm |
This
output transformer looks pretty similar to the one found in the
Klangfilm 408a amp (the 714085-35-675), but this here can only be
used for 400Ohms.
Click
here for data. |
|
|
50 Watts Transformers |
|
|
|
|
 |
714102/
52/698 |
 |
6SELA2754
6SELA2735
KLV 551 |
50 watts
EL34 PP
-
200 Ohms |
M102b
52mm |
Two
100 Ohms secondary windings (once interleaved). Can be parallelly
wired to obtain 50 Ohms secondary. Transformer
still works good on 16-32 Ohms with lower primary. |
|
 |
714102/
52/1797 |
 |
6SELA2525
(early versions)
|
50 watts
EL34 PP
-
200 Ohms |
M102b
52mm |
Four secondary windings of 50 Ohms allow to wire the transformer for
8-16 Ohms operation. This transformer delivers 51 watts of pure sine
wave output power into 8 Ohms in the original circuit. Great! |
|
 |
71716
J102
D999 |
 |
6SELA2525
(later versions)
|
50 watts
EL34 PP
-
200 Ohms |
M102b
52mm |
Four secondary windings of 50 Ohms allow to wire the transformer for
8-16 Ohms operation. This transformer delivers 51 watts of pure sine
wave output power into 8 Ohms in the original circuit. Great! |
|
|
100 Watts Transformers |
|
|
|
|
 |
714102/
52/972 |
 |
6SELA2803
6SELA2797
6SELA2798
(early versions) |
100 watts
EL34 PP
-
100 Ohms |
M102b
52mm |
One
0.7 DC-W(middle) and two
1.4W secondary windings lead to 100W. The
inner 0.7W winding
works OK with 8W
speakers (up to 80 watts).
Primary DC-R:
225-122-CT-122-225 Ohms. |
|
 |
71916-J102D999
714102/
65/1849
|
 |
6SELA2600
|
100 watts
EL34 PP
-
100 Ohms |
M102b
66mm |
Four secondary windings of 25 Ohms allow to wire the transformer for
4-8 Ohms operation. Perfect for hifi PP and SE projects. Great! One
of the best OPT ever made. |
|
 |
71906
714102/
65/2016
|
 |
6SELA2805
|
100 watts
EL34 PPx2
-
100 Ohms |
M102b
66mm |
Four secondary windings of 25 Ohms allow to wire the transformer for
4-8 Ohms operation. Perfect for hifi PP and SE projects. Great! One
of the best OPT ever made. |
|
 |
714102/
65/1688
|
 |
6SELA2798
(later versions)
|
100 watts
EL34 PP
-
100 Ohms |
M102b
66mm |
Four secondary windings of 25 Ohms allow to wire the transformer for
4-8 Ohms operation. Perfect for hifi PP and SE projects. Great! One
of the best OPT ever made. |
|
|
250 Watts Transformers |
|
|
|
|
 |
711135/
70/1518
|
 |
6SELA2796
|
250 watts
EL34 PPP
-
40 Ohms |
M102b |
10 secondary windings allow to wire the transformer for
4-8 Ohms (3.6 or 6.4 Ohms) operation. Perfect for hifi PP and SE
projects. |
|
|
|
|
|
|


|
|