Bedini RPX Sideband Generator



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Thread: Bedini's Linear Current Amplifier

  1. #21
    In the process to prototyping this circuit. The previous circuits I have already built is very similar to this one, I think the loading of the wheel was because the load, dropped the battery voltage. If the battery was kept as 15V under load, maybe the wheel would keep it's speed.

    I had the feeling I was close, because I could, turn up the voltage, to maintain the load at 15V (the set impedance threshold at 15V determined by a command voltage, from a potentiometer) but if I took the load off the battery, The battery would try and charge to 16V.

    So I just needed something to turn up the command voltage (this is the voltage just from the potentiometer) with presence of a load.

    Something that can sense current, that can help stabilize the voltage with changes in current. And tell the "linear amp regulator" to supply the load with more current, to maintain the voltage.

    But when the impedance of the battery is low enough at 15V, the "Linear amp regulator" will limit the current to maintain 15V.

    My previous circuits were missing IC2A, the current sensing feedback amp.

    There may be some experimentation involved with mixing the "current" and "voltage" signal, for the correct impedance feedback.

    If impedance or resistance = volts/amps, then op-amps need to apply the same mathematical formula, with an analogue computer/logic/op-amp calculator (op-amps performing analogue voltage calculations)

    To calculate the impedance from the measured voltage and current signals with an op-amp.

    Then the "linear amp regulator" can listen to impedance changes in the battery. Then the "linear amp regulator" knows the right timing for the pulses.
    Last edited by Nityesh Schnaderbeck; 09-22-2014 at 03:36 AM.

  2. #22
    Quote Originally Posted by Joster View Post

    I cannot thank you enough for your work here. I did not ever think I would see a schematic like this that actually makes replicating this circuit possible. I am on holidys next week so I am thinking of building this circuit up to test. Wondering if you have protoyped it yet or if anyone else has and how it is preforming. Is it able to supply 2 Amps? I could also layout a pcb design for all of us here o make building it easier
    T-E-A-M Together-Everyone-Achieves-More

    PCB is great Thankyou , making strip-board, projects takes a very long time to build for me.

    How much current it will produce has a lot to do with your ssg machine, as this design can have over 10A flowing though the beta multiplier and the PNP output device.
    Last edited by Nityesh Schnaderbeck; 09-22-2014 at 10:37 AM.

  3. #23
    Cool, I will get to work on it.

    I am working from the schematic you posted with the ic2 power and grnd pin correction as well as the r7 zener reference connected to beta multiplier emitter hopefully it will make it easier for everyone to get this circuit going. We can keep making revisions until its cut and dry.


  4. #24
    excellent, Many talents in this forum, not everyone is a PCB artist. I have been using a computer cpu heat sink, to cool the beta multiplier and and the PNP output device. And I have using the fan, to cool when the heat sink gets too hot. But if you use 2n3055 devices that are TO-3 packages, the cpu heat sink would not suitable. Have fun designing.
    Last edited by Nityesh Schnaderbeck; 09-22-2014 at 11:50 PM.

  5. #25
    Im so glad people are joining in the fun. In video 37 the second large resistor hiding behind the cap could it be a higher value and hooked to ground to dump anything not used by the system? there is also a pre-conference video out on u-tube by Mr Bedini about the linear amp called Linear Amp Control SSG / School Girl Motor on utube.
    Natiyesh, would you mind posting your 2 older versions of your circuit.
    I found the error in my bread board and the circuit is working now.

    Mr Bedini talks about servo amp, summing amp, and comparator. but his Op Amp is only 8 pins so the most he can have is 2 op amps unless one is hidden on the board that you cant see, or he is preforming the summing or servo current sensing an other way.
    I dont think people realize what He has done. He has created a clean linear dc power source from a mass less potential. what can you run with that?

    Natiyesh i will second that your circuit is working I think you nailed it by calling it an impedance regulator.

  6. #26
    Hi guys,

    I do not want to spoil your excitement. But you should really consider using emitter follower for the output.


  7. #27
    Quote Originally Posted by Lman View Post
    Hi guys,

    I do not want to spoil your excitement. But you should really consider using emitter follower for the output.

    Lman, do you have a schematic that can help move things in that direction?

  8. #28
    Nityesh,Ecancanvas, do you think you guys could post a short video would be awesome to see there circuit in operation

  9. #29
    Thankyou for your Knowledge "Lman", I will investigate the emitter follower:, My interest is to find the truth of this "linear amp regulator" beyond "ego and arrogance", then clear thinking is possible. This suggestion could prevent us from floundering around for years and years. I could not thank you enough. I have lots of holes in my knowledge, and love to learn new things.
    Last edited by Nityesh Schnaderbeck; 09-24-2014 at 01:45 AM.

  10. #30
    Quote Originally Posted by Lman View Post
    Hi guys,

    I do not want to spoil your excitement. But you should really consider using emitter follower for the output.


    This design has PNP output transistor and a resistor, on the emitter. I am taking the output from the collector. If this Means changing this to an NPN output transistor, and taking the output from the emitter.

    This is very a simple mod.

    For NPN output transistor, swap pin5 and pin6 of IC1B, and connect the collector of the NPN to R15 and the emitter to the positive of the battery.
    Last edited by Nityesh Schnaderbeck; 09-23-2014 at 06:57 PM.


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