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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
Posted to rec.crafts.metalworking,sci.electronics.design
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Safely testing 22 kV capacitors
"Ignoramus27088" wrote in message . .. Got myself some capacitors for $10 apiece. http://cgi.ebay.com/ws/eBayISAPI.dll...tem=7603382621 The specs are 22 kV, 1 uF, discharge capacitor. See http://igor.chudov.com/tmp/cap.jpg The seller was wrong in describing them as 22 VOLT capacitors. They are 22 KILO volt capacitors. (the seller is Fermilab). Are you sure that Fermilab is the actual seller? Based on what I know of DOE labs, it's not very likely that they would be selling direct on Ebay or even to the public at large. snip -- NewsGuy.Com 30Gb $9.95 Carry Forward and On Demand Bandwidth |
#2
Posted to rec.crafts.metalworking,sci.electronics.design
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Safely testing 22 kV capacitors
On Thu, 30 Mar 2006 22:51:35 -0600, "Mike Henry"
Gave us: Are you sure that Fermilab is the actual seller? Based on what I know of DOE labs, it's not very likely that they would be selling direct on Ebay or even to the public at large. snip However, the seller would not likely be able to get away with using the moniker either. I think it is legit, and I think they have SEVERAL "liquidation expediters" in their employ. The prices of these caps new means that whatever they can recover from the old change outs is that little bit more toward the whole budget. |
#3
Posted to rec.crafts.metalworking,sci.electronics.design
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Safely testing 22 kV capacitors
"Roy L. Fuchs" wrote in message ... On Thu, 30 Mar 2006 22:51:35 -0600, "Mike Henry" Gave us: Are you sure that Fermilab is the actual seller? Based on what I know of DOE labs, it's not very likely that they would be selling direct on Ebay or even to the public at large. snip However, the seller would not likely be able to get away with using the moniker either. I think it is legit, and I think they have SEVERAL "liquidation expediters" in their employ. The prices of these caps new means that whatever they can recover from the old change outs is that little bit more toward the whole budget. It's more likely that lab "junk" is sold off for salvage and that the salvagers or someone they've sold to are auctioning off the stuff. It seems really unlikely to me that anyone at Fermi Lab, or DOE for that matter, would bother to check Ebay seller names for usurpers of their "name". I haven't checked, but would guess that Fermi Lab's budget is at least a few hundred million dollars per year and technical staff probably bill out at around $125 and up per hour. They'd have to get pretty good prices for those caps at that rate to break even - did they? Mike -- NewsGuy.Com 30Gb $9.95 Carry Forward and On Demand Bandwidth |
#4
Posted to rec.crafts.metalworking,sci.electronics.design
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Safely testing 22 kV capacitors
On Fri, 31 Mar 2006 10:59:46 GMT, Roy L Fuchs wrote:
On Thu, 30 Mar 2006 22:51:35 -0600, "Mike Henry" Gave us: Are you sure that Fermilab is the actual seller? Based on what I know of DOE labs, it's not very likely that they would be selling direct on Ebay or even to the public at large. snip However, the seller would not likely be able to get away with using the moniker either. I think it is legit, and I think they have SEVERAL "liquidation expediters" in their employ. The prices of these caps new means that whatever they can recover from the old change outs is that little bit more toward the whole budget. It is, doubtless, definitely Fermilab. I will go to him on tuesday into Fermilab itself. I find it difficult to imagine a private individual sellings his own things in this manner. i |
#5
Posted to rec.crafts.metalworking,sci.electronics.design,alt.marketing.online.ebay
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Safely testing 22 kV capacitors
[alt.marketing.online.ebay -- I am talking about an item that I won
on ebay recently, see http://cgi.ebay.com/ws/eBayISAPI.dll...tem=7603382621 ] On Fri, 31 Mar 2006 06:51:39 -0600, Mike Henry wrote: "Roy L. Fuchs" wrote in message ... On Thu, 30 Mar 2006 22:51:35 -0600, "Mike Henry" Gave us: Are you sure that Fermilab is the actual seller? Based on what I know of DOE labs, it's not very likely that they would be selling direct on Ebay or even to the public at large. snip However, the seller would not likely be able to get away with using the moniker either. I think it is legit, and I think they have SEVERAL "liquidation expediters" in their employ. The prices of these caps new means that whatever they can recover from the old change outs is that little bit more toward the whole budget. It's more likely that lab "junk" is sold off for salvage and that the salvagers or someone they've sold to are auctioning off the stuff. It seems really unlikely to me that anyone at Fermi Lab, or DOE for that matter, would bother to check Ebay seller names for usurpers of their "name". I haven't checked, but would guess that Fermi Lab's budget is at least a few hundred million dollars per year and technical staff probably bill out at around $125 and up per hour. They'd have to get pretty good prices for those caps at that rate to break even - did they? Mike, I am going to Fermilab to pick up these capacitors on Tuesday and they want payment in form of checks made to Fermilab. They take my check on the spot and do not require it to clear. I would be greatly surprised if that was not a legitimate Fermilab operation. I think that what we are observing is typical government/public funded surplus bull****. I see the same stuff all over in military surplus. Everyone is going through the motions ("we are auctioning surplus to get highest competitive value"), but no one really cares to even understand what they are selling or what it costs to sell that stuff. Some things sell well for them (like high dollar electronic test equipment sold one piece at a time), some do not. Now if this item was adequately described with love and care, then, I would suspect that it was not Fermilab but some private person who actually cares to get money for his stuff. i |
#6
Posted to rec.crafts.metalworking,sci.electronics.design,alt.marketing.online.ebay
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Safely testing 22 kV capacitors
"Ignoramus27098" wrote in message ... [alt.marketing.online.ebay -- I am talking about an item that I won on ebay recently, see http://cgi.ebay.com/ws/eBayISAPI.dll...tem=7603382621 ] On Fri, 31 Mar 2006 06:51:39 -0600, Mike Henry wrote: "Roy L. Fuchs" wrote in message ... On Thu, 30 Mar 2006 22:51:35 -0600, "Mike Henry" Gave us: Are you sure that Fermilab is the actual seller? Based on what I know of DOE labs, it's not very likely that they would be selling direct on Ebay or even to the public at large. snip However, the seller would not likely be able to get away with using the moniker either. I think it is legit, and I think they have SEVERAL "liquidation expediters" in their employ. The prices of these caps new means that whatever they can recover from the old change outs is that little bit more toward the whole budget. It's more likely that lab "junk" is sold off for salvage and that the salvagers or someone they've sold to are auctioning off the stuff. It seems really unlikely to me that anyone at Fermi Lab, or DOE for that matter, would bother to check Ebay seller names for usurpers of their "name". I haven't checked, but would guess that Fermi Lab's budget is at least a few hundred million dollars per year and technical staff probably bill out at around $125 and up per hour. They'd have to get pretty good prices for those caps at that rate to break even - did they? Mike, I am going to Fermilab to pick up these capacitors on Tuesday and they want payment in form of checks made to Fermilab. They take my check on the spot and do not require it to clear. I would be greatly surprised if that was not a legitimate Fermilab operation. I think that what we are observing is typical government/public funded surplus bull****. I see the same stuff all over in military surplus. Everyone is going through the motions ("we are auctioning surplus to get highest competitive value"), but no one really cares to even understand what they are selling or what it costs to sell that stuff. Some things sell well for them (like high dollar electronic test equipment sold one piece at a time), some do not. Now if this item was adequately described with love and care, then, I would suspect that it was not Fermilab but some private person who actually cares to get money for his stuff. Well, it's pretty hard to argue with that scenario. I work at a similar facility and will have to see if they are doing the same sort of thing. Just the other day a Hardinge bed was sitting outside waiting for disposition of some sort. The stuff that gets thrown out there would make a die-hard scrounger cry, though most of it is probably entirely used up. Mike -- NewsGuy.Com 30Gb $9.95 Carry Forward and On Demand Bandwidth |
#7
Posted to rec.crafts.metalworking,sci.electronics.design
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Safely testing 22 kV capacitors
On Fri, 31 Mar 2006 12:54:42 GMT, Ignoramus27098
Gave us: On Fri, 31 Mar 2006 10:59:46 GMT, Roy L Fuchs wrote: On Thu, 30 Mar 2006 22:51:35 -0600, "Mike Henry" Gave us: Are you sure that Fermilab is the actual seller? Based on what I know of DOE labs, it's not very likely that they would be selling direct on Ebay or even to the public at large. snip However, the seller would not likely be able to get away with using the moniker either. I think it is legit, and I think they have SEVERAL "liquidation expediters" in their employ. The prices of these caps new means that whatever they can recover from the old change outs is that little bit more toward the whole budget. It is, doubtless, definitely Fermilab. I will go to him on tuesday into Fermilab itself. I find it difficult to imagine a private individual sellings his own things in this manner. Yeah. Those caps have a very limited number of pulse cycles where they are guaranteed to maintain their rated specs. After that they are typically swapped out of a system for new components. The old ones get used in the lab or get sold as a lot. That is very likely what those are. |
#8
Posted to rec.crafts.metalworking,sci.electronics.design
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Safely testing 22 kV capacitors
On Sat, 01 Apr 2006 13:17:21 GMT, Ignoramus26172
Gave us: On Sat, 01 Apr 2006 04:06:54 GMT, Roy L Fuchs wrote: On Fri, 31 Mar 2006 12:54:42 GMT, Ignoramus27098 Gave us: On Fri, 31 Mar 2006 10:59:46 GMT, Roy L Fuchs wrote: On Thu, 30 Mar 2006 22:51:35 -0600, "Mike Henry" Gave us: Are you sure that Fermilab is the actual seller? Based on what I know of DOE labs, it's not very likely that they would be selling direct on Ebay or even to the public at large. snip However, the seller would not likely be able to get away with using the moniker either. I think it is legit, and I think they have SEVERAL "liquidation expediters" in their employ. The prices of these caps new means that whatever they can recover from the old change outs is that little bit more toward the whole budget. It is, doubtless, definitely Fermilab. I will go to him on tuesday into Fermilab itself. I find it difficult to imagine a private individual sellings his own things in this manner. Yeah. Those caps have a very limited number of pulse cycles where they are guaranteed to maintain their rated specs. After that they are typically swapped out of a system for new components. The old ones get used in the lab or get sold as a lot. That is very likely what those are. Hm... So... DO you think that they are now useless, or simply a little out of spec? They are probably fine. The spec is there so that the original purchaser knows what to expect from them at their rated specs. They are likely slightly lower in value, but they probably don't have any holes punched through them, since they get used in systems where they are used within their voltage spec. They may be slightly off their original mark, or they my be right on the money. Either way, maxwell makes some of the best HV pulse caps in the world. |
#9
Posted to rec.crafts.metalworking,sci.electronics.design
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Safely testing 22 kV capacitors
On Sat, 01 Apr 2006 13:50:36 GMT, Roy L Fuchs wrote:
On Sat, 01 Apr 2006 13:17:21 GMT, Ignoramus26172 Gave us: On Sat, 01 Apr 2006 04:06:54 GMT, Roy L Fuchs wrote: On Fri, 31 Mar 2006 12:54:42 GMT, Ignoramus27098 Gave us: On Fri, 31 Mar 2006 10:59:46 GMT, Roy L Fuchs wrote: On Thu, 30 Mar 2006 22:51:35 -0600, "Mike Henry" Gave us: Are you sure that Fermilab is the actual seller? Based on what I know of DOE labs, it's not very likely that they would be selling direct on Ebay or even to the public at large. snip However, the seller would not likely be able to get away with using the moniker either. I think it is legit, and I think they have SEVERAL "liquidation expediters" in their employ. The prices of these caps new means that whatever they can recover from the old change outs is that little bit more toward the whole budget. It is, doubtless, definitely Fermilab. I will go to him on tuesday into Fermilab itself. I find it difficult to imagine a private individual sellings his own things in this manner. Yeah. Those caps have a very limited number of pulse cycles where they are guaranteed to maintain their rated specs. After that they are typically swapped out of a system for new components. The old ones get used in the lab or get sold as a lot. That is very likely what those are. Hm... So... DO you think that they are now useless, or simply a little out of spec? They are probably fine. The spec is there so that the original purchaser knows what to expect from them at their rated specs. They are likely slightly lower in value, but they probably don't have any holes punched through them, since they get used in systems where they are used within their voltage spec. They may be slightly off their original mark, or they my be right on the money. Either way, maxwell makes some of the best HV pulse caps in the world. Thanks Roy. That's encouraging. I will try to get appropriate HV equipment and then will test the caps. I may keep one for myself. i |
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