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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
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AC to AC/DC buzzbox welder conversion - any of these parts suitable?(pix)
I've dismantled what looks to me like a huge (probably 1987 vintage)
standby UPS (uninteruptable power supply). looks like it contains a nice big rectifier bridge (with four diodes and 2 'unknown' black things on it). also on the same unit are two small mini-circuit boards, which serve 'function unknown'. anybody with ANY clues whatsoEVER welcome to respond :-) becasue I'm in a 'zero visibilty fogbank' here.... here it IS: http://members.cox.net/dave_c/bridge_rectifier_etc/ also found within same unit a huge transformer, which might become (after being partially unwound then part REwound) the core transformer of a 'homebrewed' welding high frequency converter ('later' :-). comments appreciated as to wether or not some/any, or none of these parts could be suitable for purposes intended (mainly the AC to AC/DC miller thunderbolt220 volt buzzbox conversion purpose), and, if that's 'totally unknown without their specs', what test procedures I could follow to determine wether or not these parts are a. in fact still 'good', and/or b. how their specific capacities,'specs', or ratings can be determined? (when not found on net) please no "just buy a new or used one" replies after circuit design etc I intend to house the AC/DC "adapter" in a seperate (probably old computer) case. I'm not even sure IF (one of the components pictured) *IS* a bridge rectifier, jus' for starters :-/ thanks for educating me box ps-some of the threads below gave me this hairbrained idea ;-). http://groups-beta.google.com/group/...2a632e04b91bad thread: change your AC welder to AC/DC- *how* http://www.tigdepot.com/products/p35TD-BBTF.htm Mr Tig-conversion ideas for buzzbox to AC/DC/TIG box.... http://groups-beta.google.com/group/...dc5125b81d34d7 another thread on AC/DC diodes/chokes and bridges http://groups-beta.google.com/group/...15305e672 66e using SCR to change AC to AC/DC welders...maybe http://groups-beta.google.com/group/...8c25a7372 c9b or maybe use 150 amp diodes in the bridge http://groups.yahoo.com/group/Weldin...s/message/2927 guy built a BULLETPROOOF bridge rectifier.... and some of the "high frequency unit - build it yourself idea" threads: http://groups-beta.google.com/group/...1e726748458399 thread re hi frequency DIY http://www.geocities.com/CapeCanaver...tarter/hf.html Welding Arc Stabilizer-homemade DIY high-frequency ADAPTER++++++++++++++++++++++++++ http://www.hotrodders.com/t43272.html TIG "arc starters"-thread http://www.electronics-list.com/Top_...struction.html tersla coil-Construction, Best Links (tesla coil primary circuits and "high frequency adapter welder" boxes are VERY similar, components-wise, according to some threads) http://www.electrophile.8m.com/bargsors.htm The Basement-obtaining tesla parts VERY CHEAPLY-how |
#2
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Dave,
To answer a few of your questions, Yes the 'Silver thingie' and the 'blue thingie' are both medium sized caps. No those are not rectifiers they are NPN Darlington transistors. I googled the part number "PTC10021" which is printed on them and got several good hits go here for full specs... http://www.americanmicrosemi.com/pro...PTC10021.phtml FYI googeling part numbers is a good way to get info, you just have to wade through places that want to charge for spec sheets. The black 'thingies' next to them are heat sensors. It looks like the only rectifiers are the ones on the mini circuit boards, you are right the round things is a cap, and the long dark thing is a resistor, but the other the long yellow thing is another cap... if you can read the part number on the rectifiers you can probably google up their rating but they look kinda wimpy to me. I'd say there isn't much for you to use here. Please take this the right way, I don't mean to flame you, but if you don't know parts like this by sight I'd be worried about you trying to build anything as highpower as a welder... Dave August "dave" wrote in message news:8hMOd.106427$Jk5.58877@lakeread01... I've dismantled what looks to me like a huge (probably 1987 vintage) standby UPS (uninteruptable power supply). looks like it contains a nice big rectifier bridge (with four diodes and 2 'unknown' black things on it). also on the same unit are two small mini-circuit boards, which serve 'function unknown'. anybody with ANY clues whatsoEVER welcome to respond :-) becasue I'm in a 'zero visibilty fogbank' here.... here it IS: http://members.cox.net/dave_c/bridge_rectifier_etc/ also found within same unit a huge transformer, which might become (after being partially unwound then part REwound) the core transformer of a 'homebrewed' welding high frequency converter ('later' :-). comments appreciated as to wether or not some/any, or none of these parts could be suitable for purposes intended (mainly the AC to AC/DC miller thunderbolt220 volt buzzbox conversion purpose), and, if that's 'totally unknown without their specs', what test procedures I could follow to determine wether or not these parts are a. in fact still 'good', and/or b. how their specific capacities,'specs', or ratings can be determined? (when not found on net) please no "just buy a new or used one" replies after circuit design etc I intend to house the AC/DC "adapter" in a seperate (probably old computer) case. I'm not even sure IF (one of the components pictured) *IS* a bridge rectifier, jus' for starters :-/ thanks for educating me box ps-some of the threads below gave me this hairbrained idea ;-). http://groups-beta.google.com/group/...2a632e04b91bad thread: change your AC welder to AC/DC- *how* http://www.tigdepot.com/products/p35TD-BBTF.htm Mr Tig-conversion ideas for buzzbox to AC/DC/TIG box.... http://groups-beta.google.com/group/...dc5125b81d34d7 another thread on AC/DC diodes/chokes and bridges http://groups-beta.google.com/group/...15305e672 66e using SCR to change AC to AC/DC welders...maybe http://groups-beta.google.com/group/...8c25a7372 c9b or maybe use 150 amp diodes in the bridge http://groups.yahoo.com/group/Weldin...s/message/2927 guy built a BULLETPROOOF bridge rectifier.... and some of the "high frequency unit - build it yourself idea" threads: http://groups-beta.google.com/group/...1e726748458399 thread re hi frequency DIY http://www.geocities.com/CapeCanaver...tarter/hf.html Welding Arc Stabilizer-homemade DIY high-frequency ADAPTER++++++++++++++++++++++++++ http://www.hotrodders.com/t43272.html TIG "arc starters"-thread http://www.electronics-list.com/Top_...struction.html tersla coil-Construction, Best Links (tesla coil primary circuits and "high frequency adapter welder" boxes are VERY similar, components-wise, according to some threads) http://www.electrophile.8m.com/bargsors.htm The Basement-obtaining tesla parts VERY CHEAPLY-how |
#3
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"dave" wrote in message news:8hMOd.106427$Jk5.58877@lakeread01... [snip] thanks for educating me box ps-some of the threads below gave me this hairbrained idea ;-). BTW, it's harebrained. :-) |
#4
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"Watson A.Name - "Watt Sun, the Dark Remover"" wrote
in message ... | | "dave" wrote in message | news:8hMOd.106427$Jk5.58877@lakeread01... | [snip] | | thanks for educating me | | box | | ps-some of the threads below gave me this hairbrained idea ;-). | | BTW, it's harebrained. :-) Are you sure? The meds I've been taking lately...... Definitely fuzzy in there! |
#5
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dave wrote:
snipped There is no bridge rectifier visible. Nice caps - you'll find the specs written on the side. I'm puzzled as to how you're going to build the thing. Can you follow the threads you cited to put the thing together? Ed |
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