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Registered Member #99
Joined: Thu Feb 09 2006, 06:10PM
Location: florida, usa
Posts: 637
I fail to see the harm here. He asked and was told "no". The samples came anyways. Its really not his responsibility to ensure that nothing comes to him after being told he couldnt have the samples. That is the company's responsibility.
As long as he doesnt attempt to sell them, no harm done. As for the original question, I would make an MMC for a tesla coil since that is what most people do with those nifty capacitors.
Registered Member #1911
Joined: Mon Jan 05 2009, 06:30PM
Location: Salem, Oregon, USA
Posts: 165
It would be nice to make an MMC for a Tesla coil with those caps, but it's not a very large amount of the capacitors. You would need a supply capable of something in the order of 46mA at 6KV to get the proper capacitance and a reasonable voltage. The reason I gave 46mA rather than the more common 60mA is that OBITs can be found more easily at 6KV 23mA than NSTs can be found at 6KV 60mA.
Well, that was a long rant in order to say nothing more than I advise against using these capacitors for a Tesla coil, due to inconvenience.
Registered Member #575
Joined: Sun Mar 11 2007, 04:00AM
Location: Norway
Posts: 263
If you actually read the Ryan Parle posts you'll soon realise that he actually have not done anything wrong so please stop complaining about the damn sampling.
Back to topic: Ryan Parle, I think a small sized DRSSTC would be adequate use of those capacitors.
Registered Member #1062
Joined: Tue Oct 16 2007, 02:01AM
Location:
Posts: 1529
Same thing has happened to me. I requested samples (considerably more expensive then those caps too), and they knew I was a student. They said no, but I found them at my doorstep later.
Registered Member #2038
Joined: Fri Mar 20 2009, 03:39PM
Location: Bristol Uk
Posts: 60
Dave Marshall wrote ...
I would say that perhaps it wasn't the best idea to sample so many with no purpose in mind, however, now that you've got them, you may as well put them to good use.
Dave, originally had hoped to use these caps in an MMC for my first tesla coil, at the time when i filled out the sample aplication form i thought that 10 was enough to make the MMC to the value required, when the rep said that he couldnt send me any free samples i re-did my maths to work with capacitors of a different brand and value, i then realised that my calculation for the 942's was wrong... i infact needed quite a few more to make an MMC of the correct value. hence why i now dont know what to do with them.
Thanks to those who have seen past the issue of sampling and have come up with suggestions for using the capacitors.
I've built a SGTC already so am now tempted to try somthing different. DRSSTC sounds interesting but i'm not sure if i have the right kit, am i correct in thinking that having a scope and signal generator is required? because i dont have either and right now am not in the position to be buying that kind of expensive kit. BUT it would be nice, my friends are very impressed with the various videos of musical DRSSTC's about.
How much harder is a DRSSTC to make compared to a SGTC?
Registered Member #58
Joined: Thu Feb 09 2006, 05:40AM
Location: Tri-Cities, Washington, US
Posts: 317
I'll just add in my thoughts on this, considering he filled out the form truthfully there is nothing wrong with him receiving samples. He bought the capacitors before receiving the samples anyways. Some people are really anal about this because some noobs have found out about sampling and ordered everything they possibly can. For example fairchild's 40n60's, not mentioning any names. Anyway, kudos to you.
Are those capacitors high enough to use as small batteries??? Can you take pictures???
MIT's work on making capacitors batteries is AWESOME... I can't wait for capacitors to replace batteries cause they last FOREVER, and charge close to instantly :)
banned on 5/26/2009 Registered Member #1877
Joined: Mon Dec 22 2008, 02:03AM
Location:
Posts: 147
twist2b wrote ...
Are those capacitors high enough to use as small batteries??? Can you take pictures???
MIT's work on making capacitors batteries is AWESOME... I can't wait for capacitors to replace batteries cause they last FOREVER, and charge close to instantly :)
but the charge is minuscule compared to a battery, the reason people use capacitors instead of batteries in certain applications is because they likely need a large pulse, or where sustained current is un-nessesary. although they do use supercapacitors in some items, like some cmos batteries in laptops...but they are usually in the multi-farad range. edit: the 942c's are like 1600v, and like. 0.15 uf (i think) edit edit: and capacitors do not last forever, the di-electric can eventually break down
I know they don't last FOREEEVER, but they last longer then batteries if used correctly, and will always FULLY charge... batteries have gaps.
I know they have VERY little charge unless in really high ranges ( I think they said a high Farad ranged capacitor thats triple the size of a AAA battery will last 1/8th as long )
WHat I was thinking about though, is MIT's new technology... it can hold LARGER amounts of charge, and act more like a battery. Not perfect yet, but interesting technology.
Registered Member #575
Joined: Sun Mar 11 2007, 04:00AM
Location: Norway
Posts: 263
Ryan Parle wrote ...
Dave Marshall wrote ...
I would say that perhaps it wasn't the best idea to sample so many with no purpose in mind, however, now that you've got them, you may as well put them to good use.
Dave, originally had hoped to use these caps in an MMC for my first tesla coil, at the time when i filled out the sample aplication form i thought that 10 was enough to make the MMC to the value required, when the rep said that he couldnt send me any free samples i re-did my maths to work with capacitors of a different brand and value, i then realised that my calculation for the 942's was wrong... i infact needed quite a few more to make an MMC of the correct value. hence why i now dont know what to do with them.
Thanks to those who have seen past the issue of sampling and have come up with suggestions for using the capacitors.
I've built a SGTC already so am now tempted to try somthing different. DRSSTC sounds interesting but i'm not sure if i have the right kit, am i correct in thinking that having a scope and signal generator is required? because i dont have either and right now am not in the position to be buying that kind of expensive kit. BUT it would be nice, my friends are very impressed with the various videos of musical DRSSTC's about.
How much harder is a DRSSTC to make compared to a SGTC?
It is possible but without a O'scope it will be hard. Then it might just be better getting some cheap MOSFET's and a few IC's to make a self oscillating SSTC not a DRSSTC.
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WOO!! just received a free bag of 942's... What to do with them?
