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Click on the photos for bigger picture. |
| 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 28'525 bytes |
larger view of the winding job situation 37'653 bytes |
closer view... 32'648 bytes |
The big lathe of Vogler's electro- mech.- workshop 52'391 bytes |
Job done. Photo outdoors Vogler. 35'467 bytes |
Happy Kurt with spacewound sec. 42'143 bytes |
Preparing the coil for PU-sealing. 28'865 bytes |
Unwinding the cotton thread spacing string. 46'829 bytes |
Counting 820 turns (each pin 100 turns) 42'623 bytess |
Polyurethane sealing (10 layers) 40'628 bytes |
Finished secondary 35'404 bytess |
Size comparison Kurt = 160cm 28'979 bytes |
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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 |