Quote from: Void on May 09, 2013, 12:59:17 PM
Is there a link to a schematic of an optimal version of this JT circuit? I'd like to build the most optimized version and run some power input and output tests to see how the circuit performs.
Thanks

The various JT threads on this forum document much more efficient JT circuits than this one here. The circuit under test here is the "JTBasic" circuit using a toroid and a 2n2222 transistor. Other transistors in this same circuit work "better" in the sense of being more efficient still, and slight modifications to the circuit, such as placing a 70 nF capacitor in parallel with the base resistor, make it even more efficient. If you get into optimizing the transformer, you can reach incredibly low levels of current input while still making appreciable light in a low voltage LED JT, and I've shown several times my HVJT which lights up six 90-volt NE-2 neons in series, from a single AAA battery, or even wirelessly without an onboard battery at all.

You can look thru the forum for Pirate's and Groundloop's and LaserSaber's and some other circuits for JTs that are amazingly efficient and powerful. There are many variations depending on what you want to test. My personal favorite is still my HVJT. It's not especially efficient, I optimized for high voltage, but it's cute, you have to admit that much.

Quote from: TinselKoala on May 09, 2013, 04:05:27 PM
The various JT threads on this forum document much more efficient JT circuits than this one here. The circuit under test here is the "JTBasic" circuit using a toroid and a 2n2222 transistor. Other transistors in this same circuit work "better" in the sense of being more efficient still, and slight modifications to the circuit, such as placing a 70 nF capacitor in parallel with the base resistor, make it even more efficient. If you get into optimizing the transformer, you can reach incredibly low levels of current input while still making appreciable light in a low voltage LED JT, and I've shown several times my HVJT which lights up six 90-volt NE-2 neons in series, from a single AAA battery, or even wirelessly without an onboard battery at all.

You can look thru the forum for Pirate's and Groundloop's and LaserSaber's and some other circuits for JTs that are amazingly efficient and powerful. There are many variations depending on what you want to test. My personal favorite is still my HVJT. It's not especially efficient, I optimized for high voltage, but it's cute, you have to admit that much.

Thanks for the info. That's a nice looking build you made there. I was looking for the most optimized/recent version of the JT circuit that Lawrence is saying he believes is over unity. I wanted to test with Lawrence's exact schematic and torroid winding method, if possible. I am inclined to think that it is not over unity, but want to build it and do some measurements to see how it performs. Lawrence, do you have a link to your most recent schematic?

Why not ask Lawrence to send you one of his boards for testing? One that he already has tested and found to be OU.

This is better than building your own, because there is "always something" that might keep your build from ever being OU. For instance, the Kapanadze device depends on old Russian TV yokes to work, and these are not available anywhere outside Russia. You might use the wrong color wire, or solder of the wrong composition, and either one of these things could prevent you from getting OU results.

Quote from: ltseung888 on May 09, 2013, 04:56:58 AM
The following was sent to Mr. Zhou and the Atten Technical Support.  I may have missed some firmware updates etc.

Both scopes showed crossing 0 ref line characteristics.  But the values were very different.  Both Scopes were re-calibrated according to the Instruction manual.  (The comparison may not be fair as I used CH1 Vrms as the common point.  The frequencies were clearly different).

That is why I prefer to wait for the Tektronics before doing more DSO analysis.  My advice to researchers is - get access to a high end DSO.  If you cannot have one in your lab, make sure you have acess to one somewhere. 

God Bless.

@TK

On reply 771, both scopes showed CH1 Vrms = 500mV because I adjusted the DC Power Supply so that such values are shown.  The moment I touched the DC Power Supply, I would have most probably changed the actual Input Power going into the circuit.

I and other researchers in Hong Kong have come to the view that spending money on the 4-Ch Tektronics is worthwhile.  We may not be able to have one each.  But having one to share is worthwhile.  TK, try to have access to one.  Spending 4 hours with you old scope may not be the best use of your time and energy.  (The getting wealthier Chinese Attitude is - if money can solve the problem, spend it.  The Government is printing money to match the rate of USA!)

Mr. Zhou will be happy if we order the Tektronics from him.  I and my group of researchers bought 7 Atten from him.  The cost of all of them add together is less than Poynt99's scope!

Continuing the experiment into Day 3.  It is only 5 am now.  I should take the reading at 9am.  But I plan to be out this morning and shall not be back until the afternoon.  Thus I post the result now.

Note that the voltage on Board 116 showed a big drop with the LED still ON.
The Voltage on Board 124 with capacitor and timer is still quite high.
Adding the capacitor and timer appears to make a big difference.
@testers, please try this test.  If you need more boards or capacitors, email me.