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Joulethief SEC exciter and variants

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  • Originally posted by jonnydavro View Post
    @Cosmicfarmer.The drawing on the left is correct showing the floating transistors in parallel.
    I find that with each extra transistor i add,the current drops by 3-5mA.Jonny
    there is some analogy with

    A Negative Differential Resistance Oscillator with a Negistor

    A Negative Differential Resistance Oscillator with a Negistor
    Last edited by wings; 11-01-2012, 08:51 PM.

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    • @ kazm

      Thanks for the videos. Is this circuit diagram correct?

      filament circuit diagram: http://www.overunity.com/index.php?a...0;attach=42804

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      • Originally posted by xee2 View Post
        @ kazm

        Thanks for the videos. Is this circuit diagram correct?

        filament circuit diagram: http://www.overunity.com/index.php?a...0;attach=42804
        remove the 470 cap and change the 64uf to 100uf/330v for the fuji capacitor. that circuit was specifically for the filament so "k1zm toroid filament circuit" might be more appropriate, although the diagrams for the #1 and #2 videos aren't that much different

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        • Originally posted by jonnydavro View Post
          @Cosmicfarmer.The drawing on the left is correct showing the floating transistors in parallel.
          I find that with each extra transistor i add,the current drops by 3-5mA.Jonny
          I have found that until a number of 7 floating transistors, you will see a benefit in current reduction. After adding an 8th and 9th the current consumption will start to climb again (unfortunately)

          It didnt work for me exactly like Jonny sais relating to the left diagram.
          Doing it like that did nothing (for me).
          I have the basises connected to the collectors and the last base to the negative. Only way it worked for me.

          EDIT: Due to a wiring issue, i couldnt realize this earlier. Got the left diagram working now (Transistors in parallel)
          but also after adding up 8 or 9 transistors there is no benefit of adding more.
          The circuit runs at a minimal 10 mA @ 9 Volt
          Last edited by Xenomorph; 03-09-2010, 09:33 PM.

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          • @ kazm

            Thanks.

            corrected circuit: http://www.overunity.com/index.php?a...0;attach=42806

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            • Successful test with k1zm-slayer007 toroid circuit. Resistor is maxed out at 10K.

              circuit diagram: http://www.overunity.com/index.php?a...0;attach=42828

              EDIT - Circuit will light two tubes in series, thus is putting out at least 1000 volts. Neon shows output is AC. Frequency is about 25 kHz.
              Last edited by xee2; 03-10-2010, 04:32 PM.

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              • @ kazm

                I am getting over 1000 volts out of my toroid circuit. You may be in danger of having your capacitor blow up since it is only rated at 330 volts.

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                • Originally posted by kazm View Post
                  @jonnydavro - I've had no tuning issues with the toroid, I did with the other coils but I attribute that to the fact that they were haphazardly wound. The toroid is very tightly wound and stable, and comes on to the same state I left it in last. I've found a variable capacitor across the emitter and collector to be useful for tuning as well. some videos of my setup:

                  YouTube - Exciter with big toroid #1 - LED bulb
                  YouTube - Exciter with big toroid #2 - LED bulb & Fluorescent Tube
                  YouTube - Exciter with big toroid #3 - Filament bulb
                  @Kazm.That is good news.This means that best performance specifications can be determined for a specific toroid and accurate replications easily made.
                  Great vids aswell.The output from jeannas torroid is far in excess of my small one.I will have to try and find one of those Jonny

                  Originally posted by wings View Post
                  there is some analogy with

                  A Negative Differential Resistance Oscillator with a Negistor

                  A Negative Differential Resistance Oscillator with a Negistor
                  @Wings Thanks for posting those links.I spent a fair bit of time reading the info and found it fascinating.
                  If the tranny mod is acting as a negistor then this just gets even more interesting.Many thanks.Jonny

                  @Xenomorph.Hi Its great you are experimenting with these circuits and seeing the current reduced with the tranny mod.
                  Did you find a big decrease with the first transistor and then each subsequent one drops it by 3-5mA?
                  Was your experiment using the simple sec or slayers exciter?I know you referenced my drawing but i am not sure which variant you are using.
                  Also i wonder if you increase the battery voltage,this might allow for more than 9 transistors to be added.Jonny

                  @Xee2.Great replication.These large jeanna torroids give great output and are nice and compact.
                  How did you decide on the ratio's you used on the torroid as i know you could fit more turns on for L1 and L2 or was this optimal?Jonny

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                  • @ jonnydavro

                    Originally posted by jonnydavro View Post
                    @Xee2.Great replication.These large jeanna torroids give great output and are nice and compact.
                    How did you decide on the ratio's you used on the torroid as i know you could fit more turns on for L1 and L2 or was this optimal?Jonny
                    I just used a coil that I had made for a Joule thief. I hope that as more people post data it will become clear what works best. Photo of the 15T-150T toroid I used in the toroid circuit I built is in link below. Wire is #26 solid.

                    coil photo: http://www.overunity.com/index.php?a...0;attach=42843

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                    • @Xenomorph.Hi Its great you are experimenting with these circuits and seeing the current reduced with the tranny mod.
                      Did you find a big decrease with the first transistor and then each subsequent one drops it by 3-5mA?
                      Was your experiment using the simple sec or slayers exciter?I know you referenced my drawing but i am not sure which variant you are using.
                      Also i wonder if you increase the battery voltage,this might allow for more than 9 transistors to be added.Jonny
                      Jonny,
                      actually i found the following testing the whole thing again :

                      Without any additional transistor and no CFL lit the amp draw would be > 100 mA

                      When i add ONLY one transistor the amp draw would drop to 10 mA
                      (measured with an analogue amp-meter)
                      Every additional transistor wont reduce the amp draw more than that.
                      Which seems to differ what you say that you get a 3-5 mA reduction.
                      I guess i have to try out your simple SEC circuit to compare.

                      When not adding them in parallel but more like in the right side diagram posted by CosmicFramer, then the successive addition of transistors will have reductive effects, but it won´t be as low as 10 mA





                      I use the slayer circuit with the 2N2222 and the MPSA06 in parallel
                      and with a 9 Volt Block battery

                      Last edited by Xenomorph; 03-11-2010, 03:43 AM.

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                      • @ kazm

                        In the toroid circuit I built, I found that the single MPSA06 seemed to work better than two parallel 2N2222A transistors. The MPSA06 worked at peak voltage from 6.4K to over 10K for the resistor. Where as the parallel 2N2222A transistors would only work at peak voltage over a very small resistance range.

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                        • Originally posted by xee2 View Post
                          @ kazm

                          In the toroid circuit I built, I found that the single MPSA06 seemed to work better than two parallel 2N2222A transistors. The MPSA06 worked at peak voltage from 6.4K to over 10K for the resistor. Where as the parallel 2N2222A transistors would only work at peak voltage over a very small resistance range.
                          The MPSA06 seems to be the transistor of choice for exciter circuits unfortunately they also seem to be hard to come by, can anyone point me to a good source for them?
                          Last edited by kazm; 03-11-2010, 02:13 PM.

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                          • @ kazm

                            I buy mine locally. Best on line source is Newark Electronics, has them from several manufacturers at low prices.

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                            • In this test I have two wireless tower's.The first one is 16" away from the main coil and the second one is 29" away.
                              The first one has 40 led's on it and the second one has 20 led's.
                              First I have it running off the cell phone charger then I also show it running off a 6v sla battery.

                              Here is the video.
                              YouTube - Exiter With Two Wireless Tower's



                              EDIT. Kazm Ebay is also a good source I bought a 100 of then for around $6.
                              Last edited by slayer007; 03-11-2010, 03:47 PM.

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                              • Originally posted by xee2 View Post
                                @ kazm
                                I buy mine locally. Best on line source is Newark Electronics, has them from several manufacturers at low prices.
                                Originally posted by slayer007 View Post
                                Kazm Ebay is also a good source I bought a 100 of then for around $6.
                                Found some locally, I just wasn't looking hard enough they were 45c each though so looks like ebay is still by far the better way to go

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