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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
Hi all. Picked up a stack (5) of those "resistor" variety ignition cables. Upon cutting one open the core consists of black conductive rubber with some sort of carbon fibre core, overall resistance seems to be about 10k per 5cm length dropping to 3.5k when you press on the rubber, and 1.5K if you insert meter probes into ends of core.
This gave me an idea. People are always complaining about resistor breakdowns in MARX generators, so what about using these conductive cables as resistors?
Registered Member #89
Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
You can try using ordinary vulcanised rubber pad cut into two traces and lined, acting as resistors, and you just screw the caps on equal dstances.
Some rubber I had here wasn't quite measurable with ohmmeter, but does onduct HV (I tried with an obit).
Resistance seems to be in higher megaohms, maybe even too high for my piece, I guess good pressure on contacts or using another piece of rubber would help.
Registered Member #195
Joined: Fri Feb 17 2006, 08:27PM
Location: Berkeley, ca.
Posts: 1111
conundrum we have used this method before at work and about 4" will work. only problem is that it has a limited life span. you can use inductors in place of resistors. i happened to find some on ebay. good luck. N.B.
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Conductive rubber and Marx generators
