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Forums
4hv.org :: Forums :: Tesla Coils
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Steve Ward MINI SSTC (SSTC5) problem

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gsila
Thu Mar 10 2011, 06:19PM Print
gsila Registered Member #1876 Joined: Sun Dec 21 2008, 08:33PM
Location: Slovenia
Posts: 13
Im trying to build Steves coil, but im having some troubles... soo please if can anybody check my PCB for any mistakes.

1299781047 1876 FT0 Dfafa
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mmt
Thu Mar 10 2011, 06:45PM
mmt Registered Member #2333 Joined: Thu Sept 03 2009, 03:04PM
Location: Slovakia
Posts: 80
where is gdt cap?
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gsila
Thu Mar 10 2011, 06:49PM
gsila Registered Member #1876 Joined: Sun Dec 21 2008, 08:33PM
Location: Slovenia
Posts: 13
GDT cap is C6 on half-bridge board
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mmt
Thu Mar 10 2011, 06:59PM
mmt Registered Member #2333 Joined: Thu Sept 03 2009, 03:04PM
Location: Slovakia
Posts: 80
oh sorry, i see :D
what capacity has C4,5.
did u put something in cap. and res. subs?
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gsila
Thu Mar 10 2011, 07:06PM
gsila Registered Member #1876 Joined: Sun Dec 21 2008, 08:33PM
Location: Slovenia
Posts: 13
C4 and C5 are 100nF
On res.sub i puted a jumper and on cap.sub a capacitor 2.2uF
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mmt
Thu Mar 10 2011, 07:17PM
mmt Registered Member #2333 Joined: Thu Sept 03 2009, 03:04PM
Location: Slovakia
Posts: 80
hmm, it seems design is fine, just put zeners on your FETs, what exact troubles you have with this system?
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gsila
Thu Mar 10 2011, 07:37PM
gsila Registered Member #1876 Joined: Sun Dec 21 2008, 08:33PM
Location: Slovenia
Posts: 13
i have MUR860 diodes at FETs.
hmm troubles ...Input voltage is 320V(i have IFRP460) and output is just a couple of volts without coil connected. if i connect the coil, voltage drops to zero. Ithink that there is somthing wrong with half-bridge board but i cant find what. For C7 & C8 i have 1uF 630V cap
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gsila
Thu Mar 10 2011, 07:50PM
gsila Registered Member #1876 Joined: Sun Dec 21 2008, 08:33PM
Location: Slovenia
Posts: 13
i have MUR860 diodes at FETs.
hmm troubles ...Input voltage is 320V(i have IFRP460) and output is just a couple of volts without coil connected. if i connect the coil, voltage drops to zero. Ithink that there is somthing wrong with half-bridge board but i cant find what. For C7 & C8 i have 1uF 630V cap
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mmt
Sat Mar 12 2011, 09:27AM
mmt Registered Member #2333 Joined: Thu Sept 03 2009, 03:04PM
Location: Slovakia
Posts: 80
for tests use just a couple of volts on bridge 24-48V and then try to tune your coil.
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gsila
Sun Mar 13 2011, 08:25PM
gsila Registered Member #1876 Joined: Sun Dec 21 2008, 08:33PM
Location: Slovenia
Posts: 13
YAY its SPARKING now. I had to big mosfet gate resistors
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