Kapanadze Cousin - DALLY FREE ENERGY

[d3x0r]

a capacitor, an inductor, and the high voltage transistor, but ya, basically I had potential of a surge...




Added an ATX power supply for grins, I have ~6.05V out of the 12V supply   halfway there

[verpies]

Ok, i just tried to measure the inductance with my Voltcraft LCR-9063 LCR-multimeter which has a spec. of 0.1 µH à 20 H at 250Hz, and it show -0.016mH (16uH), but it shows this for both primary (6 turns) and secondary (12 turns). 

At what frequency will you get the maximum amplitude when you feed a sinewave to the T1's windings, in parallel with a 100pF and a 1nF capacitor ? (four tests)

[Hoppy]

I had a bit of time today for experimenting and have found the effect that Itsu is having a problem with blowing mosfets.

My VCO is running at 22KHz and the nano pulser cap is as 1.5nF as specified. My mosfet is rated at 5A / 900V. At 22KHz, the supply current is 1.3A. Now when I gradually increase the frequency the current rises and at 44KHz it is 2A and then rises very quickly to 6A the (max for my bench supply) with just a furher small increase in frequency. The effect of this is to increase the width of the nano pulse. At no point did my mosfet blow but it does get hot. However, TR1 gets only slightly warm with a gate pulse of 220nS, so I'm at a loss to understand how this coil is supposed to need a heat sink and what it takes to heat it up.

Regards
Hoppy

[verpies]

Now when I gradually increase the frequency the current rises and at 44KHz it is 2A and then rises very quickly to 6A

But what is the current through Tr1 when the MOSFET is conducting ?

[itsu]

At what frequency will you get the maximum amplitude when you feed a sinewave to the T1's windings, in parallel with a 100pF and a 1nF capacitor ? (four tests)

well, that kind of hard to measure as all frequencies or above the highest frequency of my FG (5Mhz), but by looking at the harmonics and the ringing i came to this result:

12t 1nF   =  5.721 Mhz
12t 220pF =  9.090 Mhz
6t  1nF   =  8.500 Mhz
6t  220pF = 11.300 Mhz

Regards Itsu