Spark Gap Switches

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Pure tungsten is preferred for electrode use as it does not oxidize or require cleaning. Its intrinsic low resistance allows the electrodes to run cooler. Tool steel will perform reasonably well for Tesla coils but will run hotter and consequently not quench the spark as well as tungsten.

Triggered Air Gap

As used in our high powered pulser HEP90. SingIe event triggered switch will handle up to 3,000 joules at 3 to 10 kv stand off voltage. Excellent for small rail guns, coil guns, plasma guns, can and object crushing, wire exploding, plasma propulsion, magnetizing etc. Device uses 2 x 3/8" pieces of finished pure tungsten electrodes capable of many shots before cleaning. Includes our HEP9 plans.

HEP90GAP - Spark Gap w/HEP9 Plans..............$99.95

Fan Cooled Double Gap System

Excellent for Tesla Coils up to 36"

Intended for Tesla coils up to 15Kv at 200ma. Available with 3/8" machined tool steel or pure tungsten electrodes. 115 Vac is required for the high output fan. Ready to use with connection lugs. Size is 5 x 5 x 4".

SPARK1 - With 2 x 3/8" Tungsten Electrodes...................$149.95
SPARK1TS - With 2 x 3/8" Tool Steel Electrodes................$59.95

Convection Cooled Single Gap System

Excellent for Tesla Coils up to 12"

Intended for Tesla coils up to 9Kv at 50ma. Uses ¹/₄" pure tungsten electrodes mounted on aluminum heat dissipating fins. Base is polycarbonate with mounting holes. Includes connection lugs. Size is 5¹/₂" x 2 x 2".

SPARK05 - With ¹/₄" x 1" Tungsten Electrodes.............$49.95

¹/₄" x 1" Pure Tungsten Electrodes

With connecting mounting blocks and terminations. Precision machined and faced. Self cleaning and cool running, will not oxidize.

TUNG141B - Electrode Pair..............$14.95

³/₈" x 2" Pure Tungsten Electrodes

With connecting mounting blocks and terminations.

TUNG38 - Electrode Pair..............$59.95

Rotary Spark Gap

For higher power Tesla coils up to 10 to 12 foot discharges. 8 to 12 tungsten points on a ½" polycarbonate disc. Fully balanced with polycarbonate safety shield. Sold only to companies or qualified users. Precision made for professional use.

ROTARYSPARK1 - Built on Special Request Contact us for Details

Rail Gap Switches


High coulomb energy transfer switches intended for rail guns and other electro-kinetic devices. Require nitrogen gas at 10PSI. 35-page brochure on operation and assembly of these precision machined devices fully refundable with purchase.	RAILSW1 - Brochure.....................................................$20.00 RAIL1MA - 2KV at 1Mega-Amp................................$3150.00 RAIL300KA - 10 to 16Kv at 300Kilo-Amp...............$3675.00 RAIL1MAHV - 15 to 40Kv at 1Mega-Amp...............$6000.00

Orders: 603-673-6493 | Fax: 603-672-5406
Email: Sales & Orders
Email: Tech Support

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PO Box 716, Amherst, NH 03031-0716