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Overunity Machines Forum



N.R.M.R.E. An investigation.

Started by Grumage, April 11, 2017, 06:43:24 AM

Previous topic - Next topic

0 Members and 2 Guests are viewing this topic.

icarus

I am the author of the video mentioned by Grumage:

https://www.youtube.com/watch?v=iER4K1O7iMc

The circuit also works with a different transistor from TIP122, eg. TIP41C or other similar NPN.
I continued to experiment with this circuit: the following videos show the state of things.

https://www.youtube.com/watch?v=RgDTvqFr6bY

https://www.youtube.com/watch?v=ye1-Z7lfrmM

Now I'd like to share strategies and impressions to go further with others experimenters.
Maybe a bone every now from Nelson would not be a bad thing.... 

Who knows, sooner or later, maybe
But in any case thanks to Nelson for this circuit and for all his videos

Ciao

Icarus aka Mauro aka Ciucianebbia


itsu


I also did a replication last year together with Grumage.

I however never got this prolonged oscillation after disconnecting the base that Graham had with his setup.
Not even when using a wire through the toroid connected to copper tape around the HV radiant transformer (see 3th video).

My 3 video's of this replication are here:

https://www.youtube.com/watch?v=YoG8wTYa7eU&t=7s
https://www.youtube.com/watch?v=ceAHCQpnqZU
https://www.youtube.com/watch?v=JeIrnndrdnw

My redraw of the circuit can be seen below.

Regards Itsu

Grumage

Thanks Icarus and itsu.

A great start to the topic.

TinselKoala

Thanks for that redraw Itsu, you saved me the trouble. Now the resemblance to some Joule Thief circuits is easier to see.

A question about the "HV Radiant" transformer though... it appears you have labelled it as a step-down transformer, with the lower voltage winding on the HV output side. Is this correct? I can't quite wrap my mind around that.

On the original schematic it looks to me like the transformer is wired as step-UP , which makes more sense to me.

Also, does the "HV Radiant" share a common ground with the Negative rail of the power supply? Or is the Negative rail "floating" and the HV Radiant grounded to Earth?

TinselKoala

The 3n247 seems like an odd choice for a bridge rectifier that is supposed to be used in an "HV radiant" output circuit. Comments?

The closest fast diodes to the MUR440 that I have on hand are UF3003. Instead of 400V, 4 A these are rated 300V, 3A. If my local supplier doesn't have the MUR440 in stock for a reasonable price (1.00 USD or less, checking tomorrow) I'll have to use the UF3003s when I get around to constructing the circuit. Or I may go "overkill" and use MUR1560 which I know he does stock for about a dollar each.  Comments?

And I intend to use a small CRT yoke ferrite for the "toroid". Comments?


I'm attaching some data sheets below.