Hi Dave
Thanks for the comments.

LOL i was going to build a coil winder just as you described, but thought i would try a manual wind first, it was not so hard really.
i wanted a 38mm hole in the middle and 19mm square cross section coil, because i am driving at 330v fast pulses, i needed as much wire as i could get on the coil to increase the resistance.

I bought some 38mm washers with 8mm hole in middle, i used enough washers side by side to give me 19mm, i then placed two old cd's each side and two mdf disks i cut the same size as the cd's for stiffening the cd walls i then used 2 large washers to hold all together with long 8mm bolt.
I put down a thin layer of insulation tape over the washers to wind onto.

I then placed the 8mm bolt into a speed variable battery drill and held in a vice,i fed the wire through a long small dia tube to hold and feed the wire into carefull layers, with a bit of concentration and practise i got very good results, every 20 layers or so i stopped winding and brushed a layer of Laquer on the wire, i continued this until all 1.85km were wound.

I then put two more coats of laquer on the outside of the coil, and when dry i carefully dismantled the mdf and cd's, this was tricky because the cd's were glued to the coil so i used some fresh laquer to redissolve at the cd interface and then with a gentle twist of the cd removed it.

Once both cd's were removed, i then painted both flat sides with about 4 layers of Laquer with good soakings and when dry, i then removed the washers from the center, and then painted laquer on the inside.

I used a fast drying Laquer 30 minuets drying time.

Hope that helps

the finished coil is over 0.5kg Gulp

Peter

Heres a picture of the Tetra Frame, i used 1.5mm card covered in masking tape as the mold, then filled with resin.

Peter

@Peterae

Nice wind. I am wondering if you could please try something that will help with my continued curiosity with all sorts of coils using the same test method. This I call the Coil Handyguy Test because it is based on his swinging device. I have made a diagram below to explain a simple test and would like to know if your coil will make voltage rise. If you have two small neomagnets and a metal shaft, a diode, a high mf cap and a voltmeter this would take about 5 minutes. You may find the result very revealing.

@wattsup,
Joseph Newman.

--giantkiller.

Hello all,

I have to clarify something:

For me, everything except wires is a core. A strip, a donut plate........it depends only what metal(s) you use as a core.

@Grumpy

because Im using a core I HAVE success.

Otto

Hallo Otto,

>>There is of course a reason I use 40 and 60 turns but this is a long story that I will post in a few days when I have a verification of my little theory.

Ich freue mich für Dich, dass du mit deinen Forschungen weitergekommen bist, find es aber letztendlich doch schade, dass du darüber nichts detailiert mehr posten willst, aus Angst jemand verseuche deinen PC.

Gruß, Dani


(Das ist so doch blödsinn. Besorge dir ein ordenliches Antivirenprogramm, halte deinen PC durch Windowsupdate auf dem neusten Stand, und installiere eine zusätzliche Firewall. Dann wähle dich noch mit einem Router in das Internet. Wenn du meinst dein Computer ist schon verseucht, nimm die die Zeit und installiere Windows neu auf eine neue Festplatte, und hole dir deine alten benötigten Dateien über usb (mit einem festplattengehäuse) in den neu aufgesetzten rechner. Erst wenn du abgeschottet bist, gehe wieder ins Internet)
 

some people forgot Esa Manu and his posts??

Otto

@Otto,

Not at all  but finding a balance of materials has been impossible for me. To me the primary purpose for a 'core' is to be the primary winding driving the control coil of the next core.