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Thread: Bedini SG Monopole with Capacitor Discharge

  1. #41
    Junior Member
    Join Date
    Oct 2012
    Location
    Portugal,Algarve,olhão
    Posts
    12
    if you put in parallel it`s equivalent to 2uf 250v
    in series a litle less than 1uf but 500v

  2. #42
    Member
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    Jul 2012
    Location
    Central Coast Australia
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    47
    Thanks Cindi

    I have my son in the last year of high school, he wonted to do the cap dump circuit as the project,
    which is good..., it gives us chance to do it together, i have ordered the 1uf 600v cap but i will not get it time.

    Cheers,
    George N.

  3. #43
    Member
    Join Date
    Jul 2012
    Location
    Central Coast Australia
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    47
    My first cap bump circuit,
    my 4Ah @ 9 Ah in parallel were holding 13.20v for a little while, when i took some readings my 2 x 450v 3.3uf caps were not discharging they were sitting at 45.6v with little movement not sure why?.

    my circuit is all most identical to the one at the start of this post.
    SCR - 2N6509G
    Cap after bridge - 3.3uf 450v
    everything else is the same as circuit as start of post!...
    trigger - 56 ohms

    trigger -.4o SWG - 27swg i think?
    power - .60 SWG - 23swg

    Any help will be welcome

    George N.

  4. #44
    Senior Member John_Koorn's Avatar
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    Jul 2012
    Location
    Melbourne, Australia
    Posts
    1,077
    George, sounds like you cooked the SCR.

    John K.

  5. #45
    I had issues with the transistor between the opto and the SCR

  6. #46
    Member
    Join Date
    Jul 2012
    Location
    Central Coast Australia
    Posts
    47
    Hi John & Mostie

    I have replaced both the SCR and the 2N3584
    The strange thing I've noticed is that it's dumping at 32v and it drops down to 29v then back up to 32.6v on 2 pulses, and will not do that on 1 pulse, i am using a timing light to see this with 1 pulse it sits around 45v and stays,
    i didn't noticed this yesterday, after being in the back of my mind for most of the day so when i got a chance today i tried different things to find out why.
    I've got a 27" wheel with 18 magnets.
    Current draw 240ma

    When i used the same wheel on the sg circuit, I got my best charging on 2 pulses, strange!..., i have a 17" rim i think it might be time for a change!..( just thinking out allowed)

    Cheers,
    George N.

  7. #47
    Senior Member John_Koorn's Avatar
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    Jul 2012
    Location
    Melbourne, Australia
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    1,077
    George, what are you using to measure your cap voltage with? Are you using a scope to monitor the cap voltage?

    John K.

  8. #48
    Member
    Join Date
    Jul 2012
    Location
    Central Coast Australia
    Posts
    47
    Hi John

    Unfortunately i don't have a scope at the moment, I'm using a $40.Digitech multimeter.

    George N.

  9. #49
    Member
    Join Date
    Jul 2012
    Location
    Central Coast Australia
    Posts
    47
    Hi John K

    I have discovered that i had the H11D1 the wrong way around, dam" now that i have corrected it, the neon that i have put across the collector and the emitter of the BD243Cis coming on now!..

    George N.

  10. #50
    Hey George,

    If its easily transported and you're free next thursday bring it over and we can go over it.

    Cheers

    Ren

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