Featured Tesla coils

• Micro DRSSTC coils
  • Mads Barnkob – IXGN60N60C2D1
• Mini DRSSTC coils
• Medium DRSSTC coils
  • Hydron – CM300DY-24H/SKM200GB125D/MBM200A6
• Large DRSSTC coils
  • Fabricio Franzoli – CM300DY-24NF
  • Phillip Slawinski/Cameron Prince – CM600HA-24H
• Very large DRSSTC coils

Micro DRSSTC coils

Mads Barnkob – Kaizer DRSSTC II

Links	Construction, demonstration
Power supply	210 VAC through variac
DC bus capacitance	2x 410 uF / 210 VDC electrolytic capacitors in series
IGBTs	Half-bridge of IXGN60N60C2D1
Primary coil	Flat primary. Inner diameter 70 mm, Outer diameter 187,36 mm. 6 turns 1,78 mm copper wire (2,5 mm²) Turn spacing 8 mm. Tapped at 4.8 turns.
Primary capacitor	Cornell Dubilier 942C20P15K-F 2 in series 0.075 uF at 4000 VDC
Secondary coil	50 mm diameter, 200 mm long, 1430 windings 0.127 mm enameled copper wire.
Topload	40 x 215 mm aluminium tape on a Styrofoam toroid.
Coupling
Resonant frequency	327 kHz
Driver	Steve Ward UD1.3b, single side PCB
OCD	280 A limiter
Input power	210 VAC in at 2 A. 420 Watt.
On-time	120uS on-time, 35 primary cycles
BPS	350 Hz
Run mode	Interrupted
Spark length	Up to 0.37 meter long sparks.

Medium DRSSTC coils

Hydron – DRSSTC 1

Links	Construction, demonstration
Power supply	230 VAC with voltage doubler
DC bus capacitance	2x 4700 uF / 450V electrolytic capacitors in series
IGBTs	Full-bridge of CM300DY-24H, SKM200GB125D, MBM200A6
Primary coil	Flat primary. Inner diameter ? mm, Outer diameter ? mm. 11 turns 1/4″ copper tubing (6 mm) Turn spacing ? mm. Tapped at ? turns.
Primary capacitor	2uF 1000V Aerovox snubber capacitors 24 in series, 2 parallel strings 0.166 uF at 24000 VDC
Secondary coil	160 mm diameter, 700 mm long, 1900 windings 0.315 mm enameled copper wire.
Topload	160 x 740 mm aluminium ducting toroid.
Coupling	0.15
Resonant frequency	70 kHz (CM300), 80 kHz (SKM200), 65 kHz (MBM200)
Driver	Steve Ward UD2.5, with modifications
OCD	750 A (CM300), 650 A (SKM200), 650 A (MBM200)
Input power	230 VAC in
On-time	?
BPS	?
Run mode	Interrupted
Spark length	Up to 2.4 meter long sparks.

Large DRSSTC coils

Fabricio Franzoli – DRSSTC 3

Links	Construction pictures, demonstration
Power supply	10kVA Solid State Variac 0-620VDC from 220VAC mains. 15kVA 3-phase voltage doubler + automatic pre-charge circuit, 620VDC from 220VAC mains.
DC bus capacitance	4x EPCOS 4700uF / 400V electrolytic capacitors 2 in series, 2 strings for 4700uF / 800V
IGBTs	Full-bridge of CM300DY-24NF
Primary coil	Flat primary. Inner diameter ~300mm, Outer diameter ~650mm. 10 turns 3/8″ copper tubing (9.52mm), acrilic cover. Turn spacing 8mm. Tapped at 6.8 turns.
Primary capacitor	36x KEMET MKP-C4AS .68uF / 2000V film capacitors 6 in series, 6 strings for .68 uF / 12kVDC 120ARMS / EqESR = 5mOhm / @100kHz.
Secondary coil	250mm diameter, 1060mm long, 2400 windings 0.41mm (AWG26) enameled copper wire, epoxy coated.
Topload	270 x 1120mm, ring toroid, 13x rings 1/2″ (12.5mm).
Coupling	0.14
Resonant frequency	36 kHz
Driver	DD1b
OCD	1200 A
Input power	12 kW
On-time	114 – 200 us (4 – 7 primary cycles)
BPS	55 – 440 Hz
Run mode	Interrupted
Spark length	Up to 3.60m long sparks.

Phillip Slawinski/Cameron Prince – DRSSTC 6

Links	Construction, pictures, demonstration
Power supply	Variac 0-280VAC with voltage doubler
DC bus capacitance	8x REVOX RIFA PEH200OO427AM 2700 uF / 420V electrolytic capacitors 2 in series, 4 strings for 5400 uF / 840V
IGBTs	Full-bridge of 4x CM600HA-24H
Primary coil	Flat primary. Inner diameter 350 mm, Outer diameter 734 mm. 8 turns 5/8″ copper tubing (16 mm) Turn spacing 8 mm. Tapped at 4.8 turns.
Primary capacitor	1.25 uF at 8700VAC / 750ARMS / 60 kg
Secondary coil	300 mm diameter, 1500 mm long, 2100 windings 0.65 mm (AWG22) enameled copper wire.
Topload	300 x 1200 mm foam core with aluminium tape toroid.
Coupling	?
Resonant frequency	36 kHz
Driver	Steve Ward UD2
OCD	2000 – 3000 A
Input power	18 kVA
On-time	300 us
BPS	100 – 400 Hz
Run mode	Interrupted
Spark length	Up to 5 meter long sparks.