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Hi all,
thanx for clarification of green lamp phenomena... I will engage my Samsung Galaxy to see what it can see
Regarding coil:
I have 'regular' enameled wire coil as Ufo suggested, 200+ turns, 20AWG. I do experiments with this coil. But 'resonant' frequency when energy burst comes, is very low, 1kHz and is duty cycle dependent.
Then I was thinking during long nite, and Tesla said, radiant impulse appears in wire in instant moment once switch is closed. Then Ufo announced, that best result he got was parallel bifilar coil. Make sense, two wires, lowed resistance, double radiant generated. And I got idea to employ more than 2 wires at the same time. Recently I have one coil for my solar energy conversion project, to boost poor solar voltage to 400VDC for true sine wave inverter, 500W calculated load. Coil has been designed to do not generate much heat during operation. For this type of coil/transformers I am always using different litz wire (please google it, if you don't know). I just use this coil for test, without ferrite E core of course. Litz wire used is 105 x 40AWG -> total 20AWG -> 1.2mm dia. Coil used is ETD39. So there is 24 turns in 5 layers. Resistance is about 0.5 ohm. 'Resonating' on about 15kHz, which is good for electrolyte caps.
I don't have current measurement, as my meter is showing crap. Needs to buy new one,
@Ufo
I said, light is fully lit with 230VDC on it. Meaning, capacitor bank is holding 230VDC going to the bulb. Driving voltage is 35V.
Of course we can built coil operating on 230V, it must have XL high enough to allow transistor to handle his peak pulse current. But problem will be with pulse amplitude during instant off. It will climb far over Uce or Uds and poor guy will break down. With 200turns and 35V is peak amplitude around 550V, my MOSFET is 600V. I switched to IGBT, because max voltage you can get is 1200V Uce. Much better, no over voltage protection required.
@all
I don't have bigger litz wire available here. Only 20AWG, I bought it on eBay in USA and it takes 2 weeks to arrive here. You are guys in US, you can get thicker litz wire within 2 days. Can you do some tests ??? It would be nice to compare result litz wire / enameled wire. Link is here :
Litz wire 105/40 for Coil and Loop antenna 100' | eBay
this guy got a lot different sizes....
BR
Cinan
Hi all,
thanx for clarification of green lamp phenomena... I will engage my Samsung Galaxy to see what it can see
Regarding coil:
I have 'regular' enameled wire coil as Ufo suggested, 200+ turns, 20AWG. I do experiments with this coil. But 'resonant' frequency when energy burst comes, is very low, 1kHz and is duty cycle dependent.
Then I was thinking during long nite, and Tesla said, radiant impulse appears in wire in instant moment once switch is closed. Then Ufo announced, that best result he got was parallel bifilar coil. Make sense, two wires, lowed resistance, double radiant generated. And I got idea to employ more than 2 wires at the same time. Recently I have one coil for my solar energy conversion project, to boost poor solar voltage to 400VDC for true sine wave inverter, 500W calculated load. Coil has been designed to do not generate much heat during operation. For this type of coil/transformers I am always using different litz wire (please google it, if you don't know). I just use this coil for test, without ferrite E core of course. Litz wire used is 105 x 40AWG -> total 20AWG -> 1.2mm dia. Coil used is ETD39. So there is 24 turns in 5 layers. Resistance is about 0.5 ohm. 'Resonating' on about 15kHz, which is good for electrolyte caps.
I don't have current measurement, as my meter is showing crap. Needs to buy new one,
@Ufo
I said, light is fully lit with 230VDC on it. Meaning, capacitor bank is holding 230VDC going to the bulb. Driving voltage is 35V.
Of course we can built coil operating on 230V, it must have XL high enough to allow transistor to handle his peak pulse current. But problem will be with pulse amplitude during instant off. It will climb far over Uce or Uds and poor guy will break down. With 200turns and 35V is peak amplitude around 550V, my MOSFET is 600V. I switched to IGBT, because max voltage you can get is 1200V Uce. Much better, no over voltage protection required.
@all
I don't have bigger litz wire available here. Only 20AWG, I bought it on eBay in USA and it takes 2 weeks to arrive here. You are guys in US, you can get thicker litz wire within 2 days. Can you do some tests ??? It would be nice to compare result litz wire / enameled wire. Link is here :
Litz wire 105/40 for Coil and Loop antenna 100' | eBay
this guy got a lot different sizes....
BR
Cinan
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