How much voltage is present at this HV circuit output?

tl494 irfz44 step up

hi all..... I dont know how much voltage is present at the output of

this HV circuit... could someone maybe have a rough idea???



circuit:

TL494 on complementary output, each output pin driving a single IRFZ44

n-ch MOSFET... frequency is around 50-100kHz adjustable.. actually its

a modified ("build a poor man's PLASMA GLOBE Electronics NOw Aug 1997

issue)... i used TL494 in place of the SG3525 chip.. but same freq

range output... modified a "standard b/w FLYBACK with .02in thick shim

(spacing between U-U core)... with 15T bifilar primary.... supply is

around 12VDC@2A.... the mag has no note on how much voltage it

generates....

anyone out there have any rough idea for its output voltage and

current????

cuz, im planning to use this HV to drive an experimental Tesla coil...

i dunno IF THESE could drive those...

tnx for any info..

Re: HV output info pls

First of all, try to analize resistor network between output, inverting input (pin1), non-inverting input (pin2) and refference output (pin16 = 5.1V). If you know that rthe refference is 5.1V, and this will be connected to pin1 or pin 2 (directly or devided), the output voltage will be also connected (through resistors) to pin1 or 2. If you calculate voltage on pin1 and then do the same on pin2 you will be able to estimate the output voltage.
If you have problems post the circuit diagram and we will help...

HV output info pls

sorry for the confusion... but it uses a flyback transformer as the step-up....

wild guess , maybe outout is around 5KV??

Re: HV output info pls

If that's the case then I would suggest that you build a voltage divider, say, 1000:1 and carefully (DANGER: HIGH VOLTAGE) measure this devided voltage with a multimeter.
If you don't have high-voltage resistors you can use several resistors in series.
I would build someting that will have 10MΩ resistor connected in series to HV output and then 10kΩ resistor connected between that 10M and ground. It is possible that the output HV is not DC. If this is the case use high-speed HV diode connected in series with the 10MΩ resistor to rectify and a small capacitor (100nF to 1µF) connected in parallel with the 10kΩ resistor.

Be carefull; Don't touch any wire or HV resistor!!!

Other option is to use a voltmeter with HV-probe. This is safer, and will do the same job!!!

HV output info pls

ah ok.. i get your point... i think 1/4 watt resistors will do the trick....

btw, have you tried making a tesla coil??

i dont really know if THIS circuit could drive a tesla coil..

Re: HV output info pls

Try these sites for some good hints on Tesla Coils.

http://www.amasci.com/tesla/tesla.html#tplan
http://amasci.com/tesla/diode.html

From what I know so far it is difficult to judge about your power supply...

Be aware of this when designing the power supply section of a big coil.
Those huge coils that spew 10ft lightning bolts are usually being driven
by 10,000 power pole transformers ("pole pigs"),

Click to expand...