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Registered Member #1321
Joined: Sat Feb 16 2008, 03:22AM
Location:
Posts: 843
Hello Radhoo,
Thanks for the compliment.
And yes, I know Glassman's multipliers are operated in air. (I am already working on a "2nd generation" version that will be also just in air).
Lastly I agree with you about the resistors. Unfortunately, the Bud box I used this time was just too small. For example I was planning to use polystyrene caps, but they were too big. And I intended to put 33 ohm resistors in series with the diodes - for extra protection just in case - but I couldn't fit them.
Registered Member #1321
Joined: Sat Feb 16 2008, 03:22AM
Location:
Posts: 843
I'd say it's somewhere between a gummy bear and a pencil eraser. It seems "just right" for its purpose.
Edit:
BTW Patrick here's that Beru spark plug connector that screws into 7mm plug wire:
Also I'm having trouble getting some more of those spark plug terminal nuts from BG Service. Other companies sell them too but they're all a metric thread, and I need 8-32. Last time I think I got some free samples. This time, I'm trying to go through a distributor...and nobody has them in stock, and they want big bucks for shipping, etc. What a hassle. I may have to try to make them myself but that'll be hard since I'm preparing to move.
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
that link helps.
I need flexible wire. I was wondering if it would be practical to make our own 0.5 inch dia, and 1" diameter, 22 awg HV wire. we could use fish aquarium tubing then insert a taught wire then block the ends, and fill 3 feet with Qsil.
Registered Member #1321
Joined: Sat Feb 16 2008, 03:22AM
Location:
Posts: 843
A while ago I bought some "Packard 440" wire for about $1 per foot. It was 7mm diameter, silicone insulated wire with an 18 gauge copper conductor. It is very flexible wire.
Recently I went to buy some more, and I found that they stopped making the stuff.
Luckily, Kingsbourne seems to have a very similar (maybe identical) product:
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
jpsmith123 wrote ...
A while ago I bought some "Packard 440" wire for about $1 per foot. It was 7mm diameter, silicone insulated wire with an 18 gauge copper conductor. It is very flexible wire.
Recently I went to buy some more, and I found that they stopped making the stuff.
Luckily, Kingsbourne seems to have a very similar (maybe identical) product:
whats its rated hold off?
0.039 x 3.5mm = .137" x 300 V/mil = 41kV or so my conversion chain says...
Registered Member #1321
Joined: Sat Feb 16 2008, 03:22AM
Location:
Posts: 843
I've never seen any kind of voltage rating on spark plug wire. But by way of comparison to similar wire which is rated, I think 40 kv would be about the maximum I'd expect the 7mm plug wire to reliably insulate.
BTW, I'm not happy with this Qsil12 silicone stuff. It has one major drawback that significantly irritates me: The curing agent contains - according to the MSDS - "light aliphatic hydrocarbon solvent". It stinks...literally. Here it is several days after it's cured, and it still smells strongly of mineral spirits.
I think I'm going to call their tech support people this week sometime and ask if the odor ever goes away.
I know some of the solvent ended up in my vacuum pump because I smelled it when I took the exhaust line off the pump; and now the pump won't pump below 100 u...indicating to me that the pump oil got contaminated.
If I ever encapsulate anything with silicone again, I'm going to use Sylgard 184 or something, even though it's significantly more expensive.
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Potting A Voltage Multiplier
