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Registered Member #1157
Joined: Thu Dec 06 2007, 12:11PM
Location: Houston, TX
Posts: 307
I was looking around for soldering iron stations when my usual non-linear browsing techniques brought me to discover these little guys.
I wonder if they would make inexpensive MMC's. . . .
For my 15Kv/60 mA NST, LTR sync cap should be around 20.2nF. 24 of these would give me 20.83nF with a rating of 24,000V. I'd say that would be close enough for the girls I know.
Should I buy up some of them and give them a whirl, or do any of you have any experience with these guys?
Registered Member #1107
Joined: Thu Nov 08 2007, 10:09PM
Location:
Posts: 792
they seem just fine the only thing i could possibly find wrong with them is the power rating could be to low to handle the 60ma from the nst but in that case putting them in mineral oil will solve that prob so give them a shot and see what happens
Registered Member #690
Joined: Tue May 08 2007, 03:47AM
Location: New Jersey, USA
Posts: 616
Based on the price of those capacitors I would definitely say they're at least worth a shot, and if they die you're only down $24. I really hope you try them since if they turn out to work well I think a lot of people here will be interested (me included).
As for that capacitor Tonic, I have no idea. I don't known how well film caps age, but if they've been removed from a Soviet ICBM then I wouldn't trust them.
Registered Member #1225
Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
well the only problem with those caps is that they are rated for 1000 volts DC.I dont know if ac would be much different but i used some caps for a small tesla coil and i later found out they were dc caps.I screwed them over...
Registered Member #528
Joined: Fri Feb 16 2007, 10:32PM
Location: Warsaw, Poland
Posts: 166
Shaun wrote ...
As for that capacitor Tonic, I have no idea. I don't known how well film caps age, but if they've been removed from a Soviet ICBM then I wouldn't trust them.
They are brand new. But I'm going to forget about them, 4700pF is equal to 4.7nF, not 47nF as I have stated earlier. I found now those : 33nF 1600VDC and 500VAC. What about them? And I have a question, which current has to be a factor in selecting capacitors, AC or DC?
Registered Member #1084
Joined: Mon Oct 29 2007, 08:58PM
Location:
Posts: 28
hi ,dont know about those caps,but i have 300 of the famous blue caps as used by me and several other UK coilers. 0.068 nF 1600 volt. i have used these on my big 4 kw coil and as far as i know no one has ever had one fail so far due to cap breakdown. a few wiring failings but thats not the fault of the cap, more sloppy design and bad layout. you could have all 300 for 70 dollars plus postage. i would rather sell them all as one lot to reduce postage but will split them if no one wants to buy the lot. just brought 60 cd492's for my drsstc project so dont need these ones any more. they are unused and in sealed bags. cheers bob golding
Registered Member #1157
Joined: Thu Dec 06 2007, 12:11PM
Location: Houston, TX
Posts: 307
Well, dry run, the caps started to ionize the spark gap, but then I started getting arcing between the individual caps. I guess I'll buy some mineral oil and try them immersed. I'll keep ya'll posted.
Registered Member #1157
Joined: Thu Dec 06 2007, 12:11PM
Location: Houston, TX
Posts: 307
Well, with the 24 array MMC made with these caps, I can honestly say, it is an utter failure. Even immersed in mineral oil, the caps could not perform.
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Inexpensive MMC caps?
