12V 60A car battery , maybe dead?

[mscoffman]

I had hoped that this thread was about replacing lead acid batteries with capacitors.

Is anyone working on creating a capacitor of capacity comparable to a 12V 60a BATTY?

User lasersaber at laserhacker.com did it with supercapacitors. See his vids at youtube.com as well.
Starting power is excellent but Ah capacity of supercapacitors rating is well below that of the
acid/lead battery. Might be workable with one of those primary/secondary battery dual diodes.


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Twisting wire would make difference only at rf frequencies. Twisting wire at low frequencies on this device
would be a waste of wire.


:S:MarkSCoffman

[Groundloop]

@groundloop
i noticed rodelu made a coil with twisted wire .
i don't see you mention twisting the wire in your first posting of the battery charger.
Is it really necessary to do this ?

If you look at the first post and drawing, then you will see that I recommended a bifilar air core coil.
My understanding at that time was that a bifilar coil was twisted together. A perfect square pulse
is composed of many frequencies, even ones in high MHz range. Since the wires is close together,
when twisted, then you get a lot of capacitive coupling between the three coils. This makes, for some
unknown reason to me, a better running oscillator and better performance of the circuit.

GL.

[Paul-R]

User lasersaber at laserhacker.com did it with supercapacitors. See his vids at youtube.com as well.

acid/lead battery. Might be workable with one of those primary/secondary battery dual diodes.

Thanks. ... and, as a bonus, it looks as if we get to convert the fans from office fans into helicopters!
(I have a stack of these sky blue fellas since I find the motors useful).

[Richdes]

Hey GL I have playing with this circuit for long time with some god and bad results. I have burn many transistors now I m waiting for superpower transistor 2SC5570 winch is 1700v 56A peak current and 100ns fast switching but now I have some ideas to get fast desulphation process like to make a step up air coil transformer with 9 turns #4 magnet wire in primary and 200 turns for secondary windings as you teach us in your circuit my goal is tuning exactly 3.26mhz on primary and induct that freq in secondary with high volt spikes what do you think about it Groundloop.. 

[Groundloop]

Hey GL I have playing with this circuit for long time with some god and bad results. I have burn many transistors now I m waiting for superpower transistor 2SC5570 winch is 1700v 56A peak current and 100ns fast switching but now I have some ideas to get fast desulphation process like to make a step up air coil transformer with 9 turns #4 magnet wire in primary and 200 turns for secondary windings as you teach us in your circuit my goal is tuning exactly 3.26mhz on primary and induct that freq in secondary with high volt spikes what do you think about it Groundloop..

Richdes,

The power transistor will burn if you run the circuit with no output load. One way to protect the transistor
against over voltage is to put a Transient Suppressor over the collector to the emitter. EPCOS has many
good Transient Suppressors. Select one that has a voltage rating below the maximum SOA of the transistor,
but still high enough to get high voltage "spikes" on the output. So for your 1700 volt transistor
the Transient Suppressor should kick in at around 1000 volt or so. Also use a good heat sink on the transistor. The 2SC5570 transistor will probably do a good job in the circuit. Why 3,6MHz? Do you plan to "hit" the
battery resonance point?

GL.