Joule Thief Bedini Motor

[Pirate88179]

Jonny:

I have a question on the coil for Bedini.  I have the three pack of mag wire from Radio Shack.  (22,26 and 30 ga.)  There is not enough of any 2 sizes of wire to make a good size coil.  Can I solder one end of one wire to the other to make it longer?  Then I can go buy another pack of wire and use 2 spools of the 2 sizes.

Lidmotor used mixed sizes in some way and said he was getting a type of transformer effect somehow.

Also, I was thinking about winding a trifilar coil using 3 sizes of wire and just not using the 2 ends of the 3rd winding right away.  Do you think this would hurt the coil?

Sorry for all of the questions.  I guess I could just try it and see but, if someone else has already tried and it does not work, it would save me time and materials.  Thanks.

Bill

[jonnydavro]

@Pirate.Hi Bill,thanks for the Your kind comments.Regarding your Bedini build,I can't see a problem soldering two spools together if of the same gauge,others have done it sucessfully just pay attention to insulating the joint,nail varnish should do the job.If Lidmotor has done it with different gauges and reported interesting results then that too is worthy off further investigation,i have not personally done this.
  The coil i have had good results with is two 250gram spools off 26swg wire  wound bifilar giving me 1:1.
(I was thinking off transformer action when i decided on using the same gauge for both trigger and power.).I know Bedini uses different gauges but i wanted to try something different,who knows what you might discover if we stray from a well troden path?
My next coil will be three 250g spools off 28swg wound trifilar.I think it would be a good idea to wind your coil trifilar as it gives more recovery options and i don,t think it will be detrimental to your Bedini motor performance,it will give you a lot more options for trigger and power circuits.Another tip i can give you is to put plenty off adjustment for tuning in the base circuit.I use a 20k variable,a 1k variable and a fixed 100ohm resistor.If i can be off any more help just ask.
                                                                                         regards Jonnydavro

[Yucca]

@Jonnydavro
Nice experiments.

@Bill

Can I solder one end of one wire to the other to make it longer?

When splicing wires for coils, solder and then wrap with a good few wraps of tape for physical protection. If you don´t do this then you run the risk of the sharp edges of the cut ends wearing through the laquer of adjacent coils over time, if that coil is in the higher or lower stand then you end up shorting a full stand or more.

[Pirate88179]

Jonny:

Thank you for your answers.  Yes, you got exactly what I was thinking about with the third wire in the wind....for possible later use and experimentation.  It will save me from having to make another coil later on.

I got a response to my question on Lidmotor's video on youtube about how he wound his small coil.  I understand better now.  He used the same RS kit for wire I have and wound all of the 26 ga. and all of the 30 ga.  The transformer parts comes into play because the wire spools are of different lengths so he has more of the thinner wire than the thicker.  He says it works better than expected and is interesting.  He did not solder them together like I first thought.

I appreciate your advice and offer of future help...I will probably need it.  Good suggestion on the additional resistance adjustment capability.  I will do it like you suggest.  My rotor is from an old VCR spindle and turns very freely so we will see if I can get this thing built in the next few days or so.

Thanks again.                    Great topic you have here!

Bill

[nievesoliveras]

@jonnydavro

I did not want to say anything yet, but I am having a tremendous success!!!!!!
http://www.overunity.com/index.php?topic=6362.msg158838#msg158838

Jesus