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Hi Jules,

I'm not sure why you're seeing spikes going both positive and negative on the scope. I also can't understand why the level of the pulses is not regular (as in my scope pics).

In the...

Hi Jules,

Where is the 1 ohm resistor placed in the circuit?

Regards,

John K.

Faraday,

Same as last post - I think you will kill that battery at a C5 rate. Stick to C20 and you can't go wrong. If you haven't read Peter's "Battery Secrets" yet, I thoroughly recommend it.
...

I'd always suggest the C20 charge/discharge rate if you can. You can get away with pushing it harder every now and then but for a deep cycle I'd never push it harder than C10.

Remember that heat...

Hi Faraday,

I've only seen the charge time decrease on perfectly good battery that is repeatedly putting out it's maximum capacity (i.e fully rejuvenated). Bedini always said that once the battery...

Hi Aaron,

Yes, 15.8v comes from the Battery Bible. In reality I don't think I've ever seen a deep cycle flooded lead acid top out at that voltage. Low 15's is what I generally see too. Sorry if I...

Yes Aaron, 20W is in the ball park for a 7-8 strand coil. So I'd expect it to charge a 20Ah battery well, probably no bigger than a 25Ah. As I said, it's a guide. There's a lot of variables - Mode 1,...

Hi Gary,

A good rule of thumb I use is about 1 watt of input power for 1 amp hour of battery you're charging. When I set my SS SG to this I get about a C20 rate of charge. So for a 100AH battery...

Hi Jules,

Your measurement method looks sound, although I'd go for a 1 Ohm shunt resistor instead of 10 Ohms.

As far as what my scope shots are showing, all I was really interested in was the...

Hi Jules, yes that PWM module is a good bit of kit. I just ordered something similar.

Yes, that's what I meant about cycling the battery - charge, discharge, repeat.

Here's a couple of scope...

here's a good picture that simulates a coil (core) in saturation.

http://www.aplomb.nl/TechStuff/Switcher/SaturationScope.jpg
For a Bedini SG, where we want to maximise the "ZPE" I'd suggest...

Hi Jules,

Further comments embedded below:



This has always been a difficult one to explain and not something I fully understand either. My best explanation is that you can't run a pulsed DC...

Hi Jules, very interesting setup you have there and also very well built.

My opinions, based on my own experiments are:

1. It would be more effective to power the generator and the inverter...

Still reading with interest Yaro :D

John K.

Hi John54,

Teslagenx sell a 4 transistor Bedini SG kit for $120.00. Endorsed by John Bedini...

http://teslagenx.com/kits/tx-sg4tub.html?category=kits

John K.

Hi Yaro, it's unfortunate that the rotor is toast. I sincerely hope no one was injured! Rotors can be rebuilt - eyes on the other hand, cannot.

John K.

Hi Dave, thanks for posting that. I don't remember seeing it before.

I'm going with 350kHz on Fig.8

John K.

Hi Cmor, no - not that I'm aware of.

John K.

Slight correction - JB used 5 matched FETs in the Bedini Large Comparator... so about 12,000uF per FET

http://www.teslagenx.com/research/img/tx-comp-lg.jpg

Picture taken from...

Hi Faraday,

It's more like a permanent magnet stator version of the window Bedini-Cole window motor.

John K.

Hi Jules,

Yes, the opto trigger was a different circuit - sorry for the confusion.

No, the hall circuit (as well as the inductive trigger one) can't be adapted to run with one battery - it's a...

Hi Jules,

Here's a trigger coil version I built. I recall that the trigger coil was a separate single wound coil that was mounted in between the motor coils.

John K.

7056

Hi Jules,

I was going through some old files today and found this one. I hope you find it useful :)

John K.

7055

Hi Jules, sorry I don't have a schematic for it - it was a long time ago and I'm not sure where I saved it. Should be pretty simple though, it's a pretty standard Monostable 555 circuit. From memory...

Hi Jules,

One method I used was to control the dwell time (keeping with the auto reference) with a simple 555 timer circuit in monostable mode. This worked very well when using a potentiometer to...