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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
Posted to alt.engineering.electrical,sci.electronics.components,sci.electronics.design,sci.electronics.misc,sci.electronics.repair
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Where to find radial wire-wound power resistors?
Ceramic wire-wound 10-watt 220-ohm 5-percent radial power resistor with 0.50
inch (12.5 mm) lead spacing. Iąm flexible on the lead spacing if I can just find a supplier (preferably in USA). The original is a Cinetech SQF10W but I canąt find domestic inventory. Thanks, Dave |
#2
Posted to alt.engineering.electrical,sci.electronics.components,sci.electronics.design,sci.electronics.misc,sci.electronics.repair
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Where to find radial wire-wound power resistors?
The original is a Cinetech SQF10W but I canąt find domestic inventory.
http://www.cinetech.com.tw/upload/20...0330170655.pdf |
#3
Posted to alt.engineering.electrical,sci.electronics.components,sci.electronics.design,sci.electronics.misc,sci.electronics.repair
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Where to find radial wire-wound power resistors?
"DaveC" wrote in message ... Ceramic wire-wound 10-watt 220-ohm 5-percent radial power resistor with 0.50 inch (12.5 mm) lead spacing. Iąm flexible on the lead spacing if I can just find a supplier (preferably in USA). The original is a Cinetech SQF10W but I canąt find domestic inventory. Thanks, Dave The spec sheet says that range from .1 to 1 ohm. These are used as current sense resistors. 220 ohms at 10 watts will be much bigger. You sure you don't want .22 ohms? |
#4
Posted to alt.engineering.electrical,sci.electronics.components,sci.electronics.design,sci.electronics.misc,sci.electronics.repair
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Where to find radial wire-wound power resistors?
On 2014-09-01, DaveC wrote:
Ceramic wire-wound 10-watt 220-ohm 5-percent radial power resistor with 0.50 inch (12.5 mm) lead spacing. .... The original is a Cinetech SQF10W but I canÂąt find domestic inventory. http://www.cinetech.com.tw/upload/20...0330170655.pdf I don't think so, that data sheet says the SQF series is flat, not wound and it only goes upto 1 ohm. -- umop apisdn --- news://freenews.netfront.net/ - complaints: --- |
#5
Posted to alt.engineering.electrical,sci.electronics.components,sci.electronics.design,sci.electronics.misc,sci.electronics.repair
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Where to find radial wire-wound power resistors?
The spec sheet says that range from .1 to 1 ohm. These are used as current
sense resistors. 220 ohms at 10 watts will be much bigger. You sure you don't want .22 ohms? Aagh! Neither--it's 22.0 ohms. Thanks for challenging me. i found it at Newark, pn 40M8806. thanks. |
#6
Posted to alt.engineering.electrical,sci.electronics.components,sci.electronics.design,sci.electronics.misc,sci.electronics.repair
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Where to find radial wire-wound power resistors?
http://www.cinetech.com.tw/upload/20...0330170655.pdf
I don't think so, that data sheet says the SQF series is flat, not wound and it only goes upto 1 ohm. Thank you for that observation Jason. But that's the only SQF power resistor reference I could find. Here's images of the remains of the original: oi60.tinypic.com/vmujo1.jpg oi62.tinypic.com/wgzqdj.jpg (Note correction in an earlier post that it's 22 ohm not 220.) Surprising (to me) there is a 10A fuse in there between two 11 ohm (?) resistors! Now quite confused... Suggestions? Thanks. |
#7
Posted to alt.engineering.electrical,sci.electronics.components,sci.electronics.design,sci.electronics.misc,sci.electronics.repair
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Where to find radial wire-wound power resistors?
Here's images of the remains of the original:
oi60.tinypic.com/vmujo1.jpg oi62.tinypic.com/wgzqdj.jpg A remnant of the cerment (c; case says "TYH", although no pn. |
#8
Posted to alt.engineering.electrical,sci.electronics.components,sci.electronics.design,sci.electronics.misc,sci.electronics.repair
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Where to find radial wire-wound power resistors?
TT Electronics (irctt.com) might be the manufacturer. They have SQM and CVF
series resistors but a search for SQF turns up nada: irctt.com/file.aspx?product_id=305&file_type=datasheet For what it's worth the markings are not similar at all. (I find that manufacturers like to stick with similar font and color and such.) The internal fuse is clearly labeled 10A and 185c. Not sure if this means it's only a thermal fuse rated at a maximum of 10A or it's a current fuse rated at a maximum of 185c or if it's a thermal and current fuse. Either way it's apparently more than just a resistor. Suggestions? Thanks. |
#9
Posted to alt.engineering.electrical,sci.electronics.components,sci.electronics.design,sci.electronics.misc,sci.electronics.repair
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Where to find thermally-protected radial, wire-wound power resistors?
To summarize:
Wire-wound cermet, radial-lead 22.0 ohm, 10 watt, 5 percent, thermally-fused @ 185c / 10A. The original is a labeled SQF10W but I canąt find any reference to this series. TT Electronics (irctt.com) might be the manufacturer. They have SQM and CVF series resistors but a search for SQF turns up nada: irctt.com/file.aspx?product_id=305&file_type=datasheet Here's images of the remains of the original: oi60.tinypic.com/vmujo1.jpg oi62.tinypic.com/wgzqdj.jpg The internal fuse is clearly labeled 10A and 185c. Not sure if this means it's only a thermal fuse rated at a maximum of 10A or it's a current fuse rated at a maximum of 185c or if it's a thermal and current fuse. Either way it's apparently more than just a resistor. Help!! Cheers. |
#10
Posted to alt.engineering.electrical,sci.electronics.components,sci.electronics.design,sci.electronics.misc,sci.electronics.repair
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Where to find thermally-protected radial, wire-wound power resistors?
On Mon, 1 Sep 2014 12:09:39 -0700, the renowned DaveC
wrote: To summarize: Wire-wound cermet, radial-lead 22.0 ohm, 10 watt, 5 percent, thermally-fused @ 185c / 10A. The original is a labeled SQF10W but I canąt find any reference to this series. TT Electronics (irctt.com) might be the manufacturer. They have SQM and CVF series resistors but a search for SQF turns up nada: irctt.com/file.aspx?product_id=305&file_type=datasheet Here's images of the remains of the original: oi60.tinypic.com/vmujo1.jpg oi62.tinypic.com/wgzqdj.jpg The internal fuse is clearly labeled 10A and 185c. Not sure if this means it's only a thermal fuse rated at a maximum of 10A or it's a current fuse rated at a maximum of 185c or if it's a thermal and current fuse. Either way it's apparently more than just a resistor. Help!! Cheers. The thermal cutoff looks like a standard type rated at 10A that will open up permanently at 185°C. Similar to these: http://www.koaspeer.com/products/res...-resistors/wf/ or this: http://industrial.panasonic.com/www-...AOB0000CE8.pdf or this: http://www.te.com/commerce/DocumentD...df%7F1879738-1 Given the combination of the (rare in North America) vertical WW cement resistor and cutoff temperature values this looks like the kind of part that's easy enough to source in volume but almost impossible in small quantities. Also it's a safety device. You might be best off (or at least safest) approaching the OEM for a repair part. There's clearly something else major wrong, so it may not be worth fixing. You could try to cobb something together out of a couple 5W resistors and a thermal cutoff with some ceramic cement, at your own risk, of course. Best regards, Spehro Pefhany -- "it's the network..." "The Journey is the reward" Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com |
#11
Posted to alt.engineering.electrical,sci.electronics.components,sci.electronics.design,sci.electronics.misc,sci.electronics.repair
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Where to find thermally-protected radial, wire-wound power resistors?
On Mon, 01 Sep 2014 16:00:58 -0400, Spehro Pefhany
wrote: Also it's a safety device. You might be best off (or at least safest) approaching the OEM for a repair part. There's clearly something else major wrong, so it may not be worth fixing. P.S. Here's what this sort of thing probably looks like before it's blown up.. note all the safety agency markings: http://cfnewsads.thomasnet.com/image...544/544771.jpg Best regards, Spehro Pefhany -- "it's the network..." "The Journey is the reward" Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com |
#12
Posted to alt.engineering.electrical,sci.electronics.components,sci.electronics.design,sci.electronics.misc,sci.electronics.repair
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Where to find thermally-protected radial, wire-wound power resistors?
Given the combination of the (rare in North America) vertical WW
cement resistor and cutoff temperature values this looks like the kind of part that's easy enough to source in volume but almost impossible in small quantities. So I see! Also it's a safety device. You might be best off (or at least safest) approaching the OEM for a repair part. There's clearly something else major wrong, so it may not be worth fixing. It was due to a wiring fault, since cleared up. I bypassed the fuse and the uint powers up and looks to be OK. You could try to cobb something together out of a couple 5W resistors and a thermal cutoff with some ceramic cement, at your own risk, of course. If I was going to use this, for example, on my bench as a diagnostic tool where I would have a hand on The Switch when it was being operated, I'd have no qualms about cobbing together such a safety device. But for sale and installation into a user's business--no way. So it's kinda critical I get a replacement somehow. I'll contact those manufacturers you mentioned and ask for samples. The equipment manufacturer said that to repair this unit (the wiring fault is a common field install error) would cost more than a new unit. Clearly marketing spin and or outright lie, we now know. I'll ask about a replacement but not hopeful... Thanks, SP for your insight. Bests, Dave |
#13
Posted to alt.engineering.electrical,sci.electronics.components,sci.electronics.design,sci.electronics.misc,sci.electronics.repair
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Found them!
This is the item. It's on a Taiwanese auction site:
http://goods.ruten.com.tw/item/show?21106267141304 Even with Google Translate it's not easy to understand how to go about a transaction. Has anyone use this "pinkciao" site? Do I need to register? (Do I see e-Bay ownership here?) This is the only reference I've found for this part anywhere so I need to get a few. Help? Thanks. |
#14
Posted to alt.engineering.electrical,sci.electronics.components,sci.electronics.design,sci.electronics.misc,sci.electronics.repair
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Found them!
On 2014-09-03, DaveC wrote:
This is the item. It's on a Taiwanese auction site: http://goods.ruten.com.tw/item/show?21106267141304 Even with Google Translate it's not easy to understand how to go about a transaction. Has anyone use this "pinkciao" site? Do I need to register? the button that looks most like a buy button takes me to a page called /user/login.htm so I guess you do need to register. registration needs a Taiwanese cell phone number - can't start with + (Do I see e-Bay ownership here?) I see this: "Copyright© PChome eBay Co., Ltd." I found this. http://www.tyohm.com.tw/product/fusible%20sqf.htm http://www.tyohm.com.tw/Default_e.aspx maybe you can get "samples" -- umop apisdn --- news://freenews.netfront.net/ - complaints: --- |
#15
Posted to alt.engineering.electrical,sci.electronics.components,sci.electronics.design,sci.electronics.misc,sci.electronics.repair
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Found them!
I found this.
http://www.tyohm.com.tw/product/fusible%20sqf.htm http://www.tyohm.com.tw/Default_e.aspx maybe you can get "samples" Thank you Jasen. Stellar work! I've contacted them for samples / purchase. Fingers crossed... Cheers! |
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