How To? wind coils

[FastEddy]

??

Anyone got links to hand made inductors??

(I have misplaced my ARRL Handbook.)

 

[ostie01]

Hi, have a look at this

http://www.lalena.com/audio/calculator/inductor/
or
http://www.ee.surrey.ac.uk/Workshop/advice/coils/air_coils.html
or
http://www.rennes.supelec.fr/ren/fi/elec/docs/bobine.html
or
http://www.circuitsage.com/inductor.html
or
http://www.deepfriedneon.com/tesla_f_calcspiral.html
or
http://www.lalena.com/audio/calculator/inductor/
or
http://home.new.rr.com/trumpetb/audio/chokejs.html

Good luck, Jeff

 

[jneutron]

also:

http://www.pronine.ca/multind.htm

John

 

[FastEddy]

Got it, thanks!

The one at http://home.new.rr.com/trumpetb/audio/chokejs.html really does the trick.

back to the bench ...

 

[ostie01]

Happy this could help you. This is what this forum is all about, Jeff

 

[deaf monkey]

More basic coil info here:
http://www.colomar.com/Shavano/inductor_info.html

And some good advice on Brooks coils (where internal radius=height=width to give you the best efficiency)...here:
http://www.ee.surrey.ac.uk/Workshop/advice/coils/air_coils.html

 

[FastEddy]

Wow ... that's great!

http://www.colomar.com/Shavano/inductor_info.html ... and http://www.colomar.com/Shavano/inductor_info.html ...

Super links, both.

Thanks so much guys, I really appreciate it.

 

[KBK]

This is as good a spot to pass air as any...

I'm wondering if anyone knows a spot to get the right kind of copper or silver foil for winding your own foil inductors. I'll do a search right after this.... of course. Knowing where to get the right kind of plastic films, is a bonus too. Although, there is MUCH to be said for cheap masking tape!!!! Very benign, when it comes to interfering with the signal. If the right thickness of masking tape can be found (very thin!!!) it might work as well or better than a film of some sort. Difficult to say, unless one knows the DF of the film and the paper.

 

[FastEddy]

Massive for some ...

" ... When you see a CNC table, you get massive wood. ..."

Others of us prefer the CRC tables ....

 

[FastEddy]

masking tape?

I don't know what volrage oridinary masking tape will withstand ... my guess is somewhat less than 600 volts (DC, AC, spike, what have you ...)

I believe that laquer (paint) does a much better job and has been used for decades as the insulator of choice on otherwise bare metal conductors ... and when properly applied will withstand the 600 volts tests.

And, although silver may be an easy choice for you folks in the west Canada mining districts, us poor folk down in the lower 48 prefer copper, flat wound ... and I believe flat copper on rolls with one side plastic coated is available from a multitude of sources.