my small DR-SSTC

raff, Wed Feb 10 2010, 12:08AM

guys,

finally made one... :)

3.2" x 8.2" AWG#34 secondary

using IRG4PF50WD IGBT

some pics...

mounting for the toploads

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coated

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drive electronics.. basically from EVRs minibrute, made simpler, no OCD..im running secondary feedback only

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finally found a ferrite torroid.. dont know the AL.. 1:2:2 pri about 78uH

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two toploads

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almost IF NOT impossible to get CDE or WIMA pulse caps... SO....
my DIY PULSE cap.. 123nF @12Kv.. hey, IT works... construction method like the CDE caps (almost) cheesey

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ADDED:

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video: 1st light
Link2

had this been only an SSTC (take away the LC CAP), streamers are only 9" .... I LOVE DR!! but VERY VERY noisy! cheesey


Cheers! cheesey
Re: my small DR-SSTC
HazzWold 1993, Sat Feb 13 2010, 12:55AM

Very nicely done! beautiful big thick streamer :)
Re: my small DR-SSTC
raff, Sun Feb 14 2010, 01:54AM

Thanks Hazz smile

next will be upgrading power supply to full wave rectification + 740uF 400V filter caps... those shown above is just using halfwave rect and 330uF filter cap..


guys,
the more DC filter capacitance, the better.. right?
Re: my small DR-SSTC
mmt, Sun Feb 14 2010, 01:49PM

yea, sort of, that depends on power input
Re: my small DR-SSTC
raff, Sun Feb 14 2010, 10:34PM

Hi mmt,

so... 1000uF is ok enough for 220Vac input (for this SMALL coil)? cheesey
Re: my small DR-SSTC
mmt, Mon Feb 15 2010, 09:08PM

i thing that will be good enough wink
Re: my small DR-SSTC
raff, Tue Feb 16 2010, 01:19AM

hi

now PS is fullwave rectified mains + 1140uF 400V lytics... cheesey

now I get a bit longer streamers +1.5" ... AND violent flashovers(topload to PRI) angry at higher ON time setting on the interrupter.. I guess its time do wind me a "longer" secondary..... 3.2"x18" awg#28... will keep the freq Loaded near vicinity 200KHz or so...