H.I.D

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on this page :
https://members.tripod.com/~wvsp/light1.html

i dont understand how to make the transformer.. :roll:
what is Radio Shack "Noise Eliminator Kit" ?
and how to begin winding, wire, etc.. :?

can anyone explain me with picture please..? :lol:

 

[Russlk]

This is the idea - primary on one side, secondary on the other.

 

[Ctrl_Alt_Del]

transformer from the web site :

"Begin winding the secondary, or output (O)winding, using no. 30 AWG enameled wire (from, you guessed it!) Radio Shack's magnet wire 3-spool pack (278-1345). Recommendation: if you can get the "Heavy Nysol" insulated type of magnet wire from Mouser Electronics, it will have both better heat resistance and dielectric qualities than Radio Shack's wire and is far preferable. Mouser does not carry no. 30 AWG but they do have no. 28 AWG which is just fine. Try to wind your secondary fairly neatly, closewound (wires side-by-side, in contact). This is easy if you keep the wire feeding off the spool in tension with one hand and use your thumb on the other hand to hold down the already-wound turns. Avoid kinks at all costs, but a few overlapped or otherwise scramble-wound turns are ok (just don't get *too* sloppy). I have found it unnecessary to use an insulating tape to divide the layers of the secondary (e.g. between each layer of winding), as was outlined here prior to this update, although it is imperative you do insulate the three windings from each other. I have found that Teflon pipe "dope" tape is excellent for the purpose- it is thin and stretches to conform to irregular surfaces yet resists heat and has high dielectric strength and low loss at high frequency. At any rate, for the secondary or output winding you simply need to wind enough layers (generally 7 or so) to give a total of 400 or so turns (not particularly critical, although optimization for your particular application is advised). Each layer can be directly on top of the previous one. Overwrap the whole output winding with several *tight* layers of Teflon, secured with Scotch tape.

Then comes the primaries, or drive and feedback windings! These are few turns, each in one layer, so not bad at all. Wind the drive (D) winding first, of no. 18 or 20 AWG enameled, (again, Nysol wire is preferred) 15 turns, then loop over or otherwise leave a long center-tap lead, then another 15 turns, closewound and placed over the center of the output winding, to give a 30-turn center-tapped winding. Twist the leads from the center taps together. Secure the winding with tape, and put a layer of Teflon over it. Now do the feedback (F) winding, in the same manner, only this is no. 28 or 30 like the output was and is 10 and 10 turns, for a 20-turn center-tapped winding. Each 10 turn winding of this should be centered on the Drive winding's 15-turn halves. Secure with tape and cover with several layers of Teflon. Then overwrap the whole winding assembly with a tight layer of Scotch tape. Assemble both "E" core halves on the bobbin, with an airgap between the halves of the core. This airgap serves two functions: it limits the current delivered to the lamp thus providing the "ballasting" function, and it varies the resonant frequency of the transformer, depending on the gap spacing (larger gap = higher frequency due to less inductance of the core - simple!) A spacer of the appropriate thickness, made of some kind of cardboard or plastic and inserted between the two core halves in the center of the bobbin's hole may be needed. A "ballpark" gap to start with would be 1 mm. Your transformer is now complete although experimenting with the gap setting is necessary and will be covered later......"


ok,

is this right or wrong..? (attachment)


:roll:

 

[williB]

how are you going to wind 400 turns around a closed loop of fero magnetic material?
if it doesnt come apart you are going to have to feed each winding loop through one at a time .. which can get very messy..

 

[David Bridgen]

It appears to me that no-one has read the article properly. It gives explicit instructions on how to construct the transformer.

 

[ljcox]

is this right or wrong..? (attachment)

The 20 and 30 turn windings are non inductive since the first 10 turns are in the opposite direction to the next 10 and the same applies to 15 turn windings.

If these windings are meant to be centre tapped then each half must be wound in the same direction.

Len