40cm (15.75")  Secondary for "Black & White" Coil

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On March 24th / 2000,  this 40cm secondary has been wound by Andi Saile, Markus Ott and Kurt. The space winding has been accomplished by winding a ~0.9mm cotton thread together with the 1 mm2 Thermex 2.5 (enamelled) wire (diameter 1.33mm, with insulation). In the middle of the job, the white cotton thread finished... :-((  A speedy action revealed there was no more of this white colored thread available, but an almost similar black one. So it was possible to continue and complete the job. After all, Andi and me finished a bottle of "Black & White". Remembering my wife is "black" and I am "white" the coil got its name: BLACK & WHITE. :o)

Andi Saile winding
the secondary with
Markus Ott helping
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larger view of the
winding job situation
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closer view...
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The big lathe of 
Vogler's electro-
mech.- workshop
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Job done. Photo
outdoors Vogler.
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Happy Kurt with
spacewound sec.
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Preparing the coil
for PU-sealing.
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Unwinding the
cotton thread 
spacing string.
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Counting 820 turns
(each pin 100 turns)
42'623 bytess

sealing (10 layers)
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Finished secondary
35'404 bytess

Size comparison
Kurt = 160cm
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Actual Secondary Data:
     diameter               40cm (15.75") 
length of former  195cm (77")
length of winding 177cm (70")
number of turns        820       .
inductance (exper.)  54.6 mH
Fo.res, bare (exper.)  119 kHz