It can be done but what a job. Due to the frequency, 15750 Hz, Horizontal Output Transformers take a lot more turns of wire than a radio RF coil. In addition wire requires good insulation as there is high voltage.
Might look for a replacement? There is a TV forum at:
http://168.103.222.44/cgi-bin/forums/index.cgi
Norm
:Anyone out there ever had any success in rewinding a flyback? I am working on a 1949 Crosley w/ 12" CRT, and the primary of the flyback is open. It is of the doughnut variety, but without the thick wax covering. I noticed that the winding is wound in a sort of overlapping "spun" pattern. Is this pattern necessary in order for it to work properly? Do I have to use cloth-covered wire (like the orginal)? Any help with this would be greatly appreciated.
:-Bryan
-Bryan
:Hi Bryan
:
: It can be done but what a job. Due to the frequency, 15750 Hz, Horizontal Output Transformers take a lot more turns of wire than a radio RF coil. In addition wire requires good insulation as there is high voltage.
:
: Might look for a replacement? There is a TV forum at:
:
:http://168.103.222.44/cgi-bin/forums/index.cgi
:
: Norm
:
:
:
::Anyone out there ever had any success in rewinding a flyback? I am working on a 1949 Crosley w/ 12" CRT, and the primary of the flyback is open. It is of the doughnut variety, but without the thick wax covering. I noticed that the winding is wound in a sort of overlapping "spun" pattern. Is this pattern necessary in order for it to work properly? Do I have to use cloth-covered wire (like the orginal)? Any help with this would be greatly appreciated.
::-Bryan
If you have a local parts house, you should be able to get quarter pound spools easily.
To a small degree the wind pattern helps reduce some of the capacity within the windings, and to help retain shape, and to also help reduce heat. It should not be absolutely critical on rewind to match the pattern perfectly.
:Thanks Norm;
:Since I last posted, I pulled the good portion of the primary (the part couple of the plate of the HV Rect)from the transformer. I'm lucky in that this particular set permits for easy removal of the complete "doughnut" from the iron core. Unfortuantely, as I figured, the good portion of the primary was wound extremely tight over the 2nd portion of the primary, which is open part. So, when I went to remove it in one piece (softened it up with brake cleaner) it unraveled on me. Got real close, but unraveled on me for the last 20 or so winds. The only reason why I'm even trying to rewind it is because I have had fairly good success using my watchmaker's lathe and wood lathe in series to tightly wind field coils, so I figured I might be able to do the same here. Dunno where I'm going to find insulated (besides enamel) wire of that gauge though. Thanks for the URL, I'll see if it pans out.
:
:-Bryan
::Hi Bryan
::
:: It can be done but what a job. Due to the frequency, 15750 Hz, Horizontal Output Transformers take a lot more turns of wire than a radio RF coil. In addition wire requires good insulation as there is high voltage.
::
:: Might look for a replacement? There is a TV forum at:
::
::http://168.103.222.44/cgi-bin/forums/index.cgi
::
:: Norm
::
::
::
:::Anyone out there ever had any success in rewinding a flyback? I am working on a 1949 Crosley w/ 12" CRT, and the primary of the flyback is open. It is of the doughnut variety, but without the thick wax covering. I noticed that the winding is wound in a sort of overlapping "spun" pattern. Is this pattern necessary in order for it to work properly? Do I have to use cloth-covered wire (like the orginal)? Any help with this would be greatly appreciated.
:::-Bryan