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Thread: Bedini's Linear Current Amplifier

  1. #71
    Nityesh, Its free but they restrict the times you can use it. They only want you using it in evening and not at work. the program is called Yenka its down side is i have not been able to find voltage regulators, but for working out how the circuit is working and the amps and voltage its pretty good

  2. #72

    Regulator Phase Splitter Amp Ver3

    I have discovered that this circuit works without the diodes.

    Regulator Phase Splitter Amp Ver3.jpg

    It seems to work better without the input capacitor, it also seems to work without the output capacitor. I have the 470uF cap in place, just an extra measure to make sure DC does not flow through the speaker.

    The ratio of resistors values in this circuit seem to give the best sound.

  3. #73

    Regulator Phase Splitter Amp Ver4

    This design can be simplified even more, and this also works. Looking at the LM317 schematic, I see that the output pin is connected to the emitter of the internal power transistor. So this amp is using an emitter follower as the output stage. Because of this, the two 47ohm resistors are load resistors and the feedback resistors. Here is the simplified schematic, and it even works.

    Regulator Phase Splitter Amp Ver4.jpg

    "Ecancanvas" you were right once again, without knowing it, in this circuit the two 47ohm resistors are feedback resistors, Congratulations, good on you and thankyou

    Some notes: If you drive it too much it will distort, too much bass will make it distort, if the load resistors are incorrect for the speaker load it will distort, and if R1 and R2 resistor values are too high or too low it will distort. But when you get the bias right it sounds good. And this amp is not very loud. The output capacity can be increased by making the two 47ohm resistors a lower value, then the regulators will need a heat sink, but this is not the point of this experiment since, this amp will not be delivering any power anyway once it is in the "Linear Amp Regulator" circuit.
    Last edited by Nityesh Schnaderbeck; 10-14-2014 at 10:54 AM.

  4. #74

    Complimentary Regulator Phase Splitter Ver.5 with offset adjust

    Here is the same circuit with an offset adjustment, I believe John Bedini had a similar or same offset adjustment on his "Linear Amp Regulator"

    Regulator Phase Splitter Amp Ver5.jpg

    Note: R2 and R3 are 3.3K (on the picture it looks like 33K)

    Reasons why I think that these regulators are used as like an audio phase splitter.

    In the posts I read John Bedini, says that the regulators have to be matched. If the regulators were used as static voltage references, then they would be not need to be matched, just simply adjust the opposite voltages the same.
    But as a phase splitter, the more identical the plus and minus regulators are in characteristics, the more accurately it will phase split the signal.

    John Bedini is also talking about regulators as class A amplifiers, and that the industry standard had taken away the control pin. But if you bias it correctly, these regulators can be used as low power Class "A" amplifiers.
    Last edited by Nityesh Schnaderbeck; 10-15-2014 at 02:49 AM.

  5. #75

    Lightbulb Regulator Phase Splitter Amp Ver6, Sounds awasome now

    I had a look at the internal schematic of the LM337 and I saw my big mistake with all the previous versions of the "Regulator Phase Splitter Amp"

    Both Lm317 and LM337 have NPN power transistors inside.

    Inside the LM317 the emitter of the internal NPN power transistor is connected to pin2 (+Vout)
    Inside the LM337 the emitter of the internal NPN power transistor is connected to pin2 (-Vin)

    So the following circuit has the internal NPN power transistors from both regulators connected as "emitter followers"

    This new circuit has the true high fidelity sounds, nice bass and nice treble, and is louder than the previous versions of this circuit.

    Regulator Phase Splitter Amp Ver6.jpg

    note: Both R2 and R3 are 3.9K (looks like 39K on the picture)

    "Ecancanvas" you will love the sound of this amp now, very nice.
    Last edited by Nityesh Schnaderbeck; 10-16-2014 at 12:37 AM.

  6. #76

    The Previous Circuits, before I came here

    Someone requested if I could post my Previous circuit designs of the "linear Amp Regulator" That I designed before I came to this forum. It may help someone to get some circuit design ideas.

    Linear Amp Reg4.jpgLinear Amp Reg1.jpgLinear Amp Reg2.jpgLinear Amp Reg3.jpg

    But now I have a new circuit that I will post soon.

  7. #77
    Quote Originally Posted by Nityesh Schnaderbeck View Post
    Someone requested if I could post my Previous circuit designs of the "linear Amp Regulator" That I designed before I came to this forum. It may help someone to get some circuit design ideas.

    Linear Amp Reg4.jpgLinear Amp Reg1.jpgLinear Amp Reg2.jpgLinear Amp Reg3.jpg

    But now I have a new circuit that I will post soon.


    @Nityesh Schnaderbeck, that would be great. YOur understanding of Electronics is very deep. But do purchase the DVD.
    http://www.teslagenx.com/dvds/eftv_3...?category=dvds
    Last edited by Tjjusten; 12-22-2014 at 12:09 PM.

  8. #78

    Linear Amp build

    Greetings:

    I have an 'up and running' version of the Linear Current Amplifier.

    A 2n3055 was used to power it on and two MJL21194s were used as Q1 & Q2, while a NTE37 is on the output.

    The whole thing is powered by a Kodak printer power supply providing 36VDC @ 2100 mA.

    This thing is pretty neat!

    I appreciate you folks sharing this.

    Right now, I'm working on a scaled up build using a transformer from a UPS, 60 Amp bridge from somewhere, a 51000 mFd cap, and several MJLs of both flavors.

    Pics attached.

    glen

    LinearAmp 007.jpgLinearAmp 008.jpgLinearAmp 009.jpgLinearAmp 010.jpgLinearAmp 011.jpg

  9. #79
    Quote Originally Posted by Tjjusten View Post
    @Nityesh Schnaderbeck, that would be great. YOur understanding of Electronics is very deep. But do purchase the DVD.
    http://www.teslagenx.com/dvds/eftv_3...?category=dvds
    Hello Tjjusten I had purchased the DVD 6 weeks before I made my fist post on this thread, and I had also purchased, the "Linear Amp Regulator" Too.

  10. #80
    Quote Originally Posted by Nityesh Schnaderbeck View Post
    Hello Tjjusten I had purchased the DVD 6 weeks before I made my fist post on this thread, and I had also purchased, the "Linear Amp Regulator" Too.
    That's awesome. i must say i was a lil disappointed when i bought the DVD. the Real content of the DC linear Amp was left as a "black box".

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