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Registered Member #54278
Joined: Sat Jan 17 2015, 04:42AM
Location: Amite, La.
Posts: 367
I have a 3/8" x 2" Tungsten rod and would like a high current "permanent" connection (Large Cu wire, etc. on the far/cooler) end...any ideas for this permanently connected electrode?
Registered Member #54278
Joined: Sat Jan 17 2015, 04:42AM
Location: Amite, La.
Posts: 367
@Sula... Thanks for the tip. It looks like the 60A connector may work! One thing I am worried about: Since Tungsten is said to be so brittle (one of mine is only 1" long, 3/8" diameter, and 70%W / 30%Cu), and the clamp-down on the rod is not completely circular when tightened (by the screw), do you think the un-even clamp will possibly result in chipping/cracking if tightened enough to carry the full 60A?
Registered Member #62119
Joined: Sun Feb 04 2018, 04:59AM
Location: Cedar Rapids, Iowa
Posts: 136
With a drill and a band saw you can make your own custom clamps that are guaranteed to fit. I have made several out of aluminum but you could also use brass.
Registered Member #54278
Joined: Sat Jan 17 2015, 04:42AM
Location: Amite, La.
Posts: 367
Also, I have a friend who likes guns. Since 3/8" is close to 9mm, I asked for a spent brass casing--It was a tiny bit too small to insert the rod. Now I need to try a .38" since that is a wee bit larger. So far I can't find one. Does a .38 mean 0.38"? Thanks all...
Registered Member #2939
Joined: Fri Jun 25 2010, 04:25AM
Location:
Posts: 615
"A tiny bit too small" sounds ideal. Flare the opening, then force the shell onto the rod with a hammer. perfect friction fit. You can probably buy 3/8" brass tube at a model shop, and use the same trick.
Registered Member #3414
Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
Something that mabe worth looking at is copper or brass fuel, gas or water pipe fittings. Fuel/ gas pipe is avainable in 3/8", water pipe compression fittings are available in 10mm as well as Imperial/American sizes. You may need some copper foil or similar as a shim, but I'd look at what's available locally.
Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
The electrical connection of course needs to be good because of the high current.
If the spark gap is expected to be used at high current for a continuous period then cooling of the electrodes becomes vital also, at least a fan-cooled heatsink, or a large heat spreader, for each electrode preferably with air blasting through the gap.
Overall, a high current spark gap is a very noisy component.
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Electrical connection to a Tungsten rod
