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Thread: Bedini SG Coils Now Available!

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  1. #1
    Senior Member John_Koorn's Avatar
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    Smile Bedini SG Coils Now Available!

    Hi All,

    We all know how much of a pain it is to wind a good quality coil for a Bedini SG. Anyone who has done it knows how difficult it is to run the wires out, twist them and then wind it onto a spool - not much fun right? And then you have to source and cut the welding rods! (Anyone who hasn't yet wound their first coil - you don't know what you're missing!)

    Well, we have some good news - coils for the Bedini SG are now available!

    We at TeslagenX have secured a supplier who has agreed to wind coils to our specifications, which are the same specifications recommended by JB. Our supplier has agreed to ship each Thursday for orders that are received by Monday.

    We have two types of coils available. The first is designed to complement the Bedini SG 4 Transistor Experimenter Kit that is already available. This coil is 5-filar, wound with 130' of 4 strands of AWG#20 and 1 strand of AWG#23. The spool is the standard Pittsfield spool (
    3.25” High x 3.5” Diameter. 0.75” Core) and each coil is filled with R60 copper coated welding rod. The price for this coil is just $100 (plus shipping)

    The second coil we have available is 8-filar, wound with 130' of 7 strands of AWG#20 and 1 strand of AWG#23. It also comes on the standard spool and R60 welding rod. This is the coil that is recommended in the Bedini SG - The Complete Beginner's Handbook This coil is only $125 (plus shipping).

    To place an order, please visit our website and see the bottom of this page: Coils and Coil Components

    Both of these coils are also designed to fit into our exclusive quality wooden coil holder, which is also available from the same web page and is only $25.

    Just think, no more trying to wind coils in the heat, rain or snow
    . Just order, receive and fit your coil

    John K, Tom C & ErikN
    Last edited by ErikN; 03-01-2013 at 03:10 PM. Reason: fixed links

  2. #2
    Quote Originally Posted by John_Koorn View Post
    Hi All,

    We all know how much of a pain it is to wind a good quality coil for a Bedini SG. Anyone who has done it knows how difficult it is to run the wires out, twist them and then wind it onto a spool - not much fun right? And then you have to source and cut the welding rods! (Anyone who hasn't yet wound their first coil - you don't know what you're missing!)

    Well, we have some good news - coils for the Bedini SG are now available!

    We at TeslagenX have secured a supplier who has agreed to wind coils to our specifications, which are the same specifications recommended by JB. Our supplier has agreed to ship each Thursday for orders that are received by Monday.

    We have two types of coils available. The first is designed to complement the Bedini SG 4 Transistor Experimenter Kit that is already available. This coil is 5-filar, wound with 130' of 4 strands of AWG#20 and 1 strand of AWG#23. The spool is the standard Pittsfield spool (
    3.25” High x 3.5” Diameter. 0.75” Core) and each coil is filled with R60 copper coated welding rod. The price for this coil is just $100 (plus shipping)

    The second coil we have available is 8-filar, wound with 130' of 7 strands of AWG#20 and 1 strand of AWG#23. It also comes on the standard spool and R60 welding rod. This is the coil that is recommended in the Bedini SG - The Complete Beginner's Handbook This coil is only $125 (plus shipping).

    To place an order, please visit our website and see the bottom of this page: Coils and Coil Components

    Both of these coils are also designed to fit into our exclusive quality wooden coil holder, which is also available from the same web page and is only $25.

    Just think, no more trying to wind coils in the heat, rain or snow
    . Just order, receive and fit your coil

    John K, Tom C & ErikN
    Here here - cheers!

    I did it 3 times 250' 9 filer. I had a blast with my kids at the park. 3rd time was not much of a charm for my little one - good thing she brought a friend, always something to do at the park.
    I've priced out other companies that sell a spool twisted, not cheap.

    Thanks for providing these.
    why not AWG#18, I thought that was the gold standard here?
    6 twists/inch?
    -edit-snip

    Kind regards,
    Patrick
    Last edited by min2oly; 03-01-2013 at 07:59 AM.

  3. #3
    Senior Member Tom C's Avatar
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    Quote Originally Posted by min2oly View Post
    Here here - cheers!

    I did it 3 times 250' 9 filer. I had a blast with my kids at the park. 3rd time was not much of a charm for my little one - good thing she brought a friend, always something to do at the park.
    I've priced out other companies that sell a spool twisted, not cheap.

    Thanks for providing these.
    why not AWG#18, I thought that was the gold standard here?
    6 twists/inch?
    -edit-snip

    Kind regards,
    Patrick
    Patrick,

    We have decided to run coils with wire sizes that match the Sg book specifications for now.

    Tom C


    experimental Kits, chargers and solar trackers

  4. #4
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    Hi John K.
    Can you please tell me what the ohms are on the AWG#20 and the AWG#23. On the chart i have the AWG#20 = .91 and the AWG#23 =.61, the reason I'm asking is because i have found a company in Sydney that sell peai grade 2 which is rated to 200 deg + the problem is that the closest to AWG#20 is .90 and AWG#23 is .60, even though they are very close I'm not sure if it would make a difference to the end result of 130 feet.

    Best Regards,
    George N.

  5. #5
    Senior Member John_Koorn's Avatar
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    Hey George,

    I'll measure my coil when I get home tonight. I'm pretty sure I have the same gauge as you in metric, but will confirm.

    John K.

  6. #6
    Senior Member Ed_Morbus's Avatar
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    John K. do you have for europe members also
    and what does it cost to ship to europe
    thank you

  7. #7
    Senior Member John_Koorn's Avatar
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    Coil Specs

    George,

    Here are the specs for my coil:
    Power winding(s) - 130' (39.624m) AWG#20. Measured 0.80mm with digital calipers. 1.322 Ohms measured with milli-ohm meter.
    Trigger winding - 130' (39.624m) AWG#24. Measured 0.50mm with digital calipers. 3.430 Ohms measured with milli-ohm meter.

    Measurements taken at ambient temperature of 15.2C/59.2F

    John K.
    Last edited by John_Koorn; 04-20-2013 at 03:36 PM.

  8. #8
    Quote Originally Posted by John_Koorn View Post
    George,

    Here are the specs for my coil:
    Power winding(s) - 130' (32.624m) AWG#20. Measured 0.80mm with digital calipers. 1.322 Ohms measured with milli-ohm meter.
    Trigger winding - 130' (32.624m) AWG#24. Measured 0.50mm with digital calipers. 3.430 Ohms measured with milli-ohm meter.

    Measurements taken at ambient temperature of 15.2C/59.2F

    John K.
    John,
    Thank you for sharing this.
    I think, thought, there is a mistake, 130' are 39,624 m, no 32,624.
    Anyway, here is a link to a very good wire calculator: The CircuitCalculator.com Blog Wire Parameter Calculator
    Values of the wires are core only, so, depending on numbers of the protection coatings, the wire is actually a little bit thicker.
    Best regards,
    Teodor

  9. #9
    Senior Member John_Koorn's Avatar
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    Quote Originally Posted by axxelxavier View Post
    John,
    Thank you for sharing this.
    I think, thought, there is a mistake, 130' are 39,624 m, no 32,624.
    Anyway, here is a link to a very good wire calculator: The CircuitCalculator.com Blog Wire Parameter Calculator
    Values of the wires are core only, so, depending on numbers of the protection coatings, the wire is actually a little bit thicker.
    Best regards,
    Teodor
    Teodor, thanks for the correction. I went back and corrected the post.

    John K.

  10. #10
    Senior Member John_Koorn's Avatar
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    Oh, and here is the chart I use that I did years ago. My chart matches my measurements and the wire from my supplier.
    Magnet Wire Data Chart3.jpg

    Looks like your chart is in SWG, not AWG.

    John K.
    Last edited by John_Koorn; 04-19-2013 at 03:49 AM. Reason: Adding info

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