Joule Lamp

[PhiChaser]

That's interesting and quite by accident that the copper portion of the wire diameter is double. 

I am attaching a drawing that might help some of you convert your LJL to this newer version. 

@ LS: So did you already have a smaller version planned or is this a new build?
Happy experimenting,
PC

[Lynxsteam]

I have made three sizes of these.  Each diameter is double the next.  3/4" D, 1.5" D and 3" D.  Each has a length about double the other.  What you make will depend on how many bulbs you want to run, and what materials you may have handy.  They all work very well.  Larger LJL Aircores have more capacity and can handle more bulbs.
The medium sized LJL is a nice size, not too big, and can handle at least a room of light.  The larger version can handle several rooms, whereas the small version can handle 4-6 bulbs.

Here is Part 1 of the "How To" series on making these AirCores.  Part 2 will cover wiring the circuit and testing.

http://youtu.be/3C-WW9gd8SM

[ehsanco1962]

Hi LYnxsyeam


Thank you for the response and the nice educational video I like these how to videos looking forward for part 2 neat winding ,does it matter if we use strand or sold insulated wire  for the primary ?


Ehsan

[ehsanco1962]

Ehsan -- the bulbs I'm using here with Lynxsteam's build are actually 220V LED bulbs!  and they work just fine, better than any 120V LED bulb I've tried in fact. 
The particular bulbs I'm using most -- not that you should necessarily use the same bulbs -- are these (shown below).

Also, "First I couldn't find PVC with same diameter can I use a little bit larger diameter ."  That should not make much difference IMHO.

Hi JouleSeeker


Thank you,  its good for these coils to work on this wide of range of voltage 120-220v.


Ehsan

[Lynxsteam]

You can use solid wire for the primary as long as it is thickly insulated and achieves the turns ratio closely spaced.  You can try most anything and see how it works.  You can use bell wire for the secondary but you wont get as many turns in the same space, so you would need to adjust the primary turns.
We are trying to make this as small and powerful as we can.