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pehamel
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Post subject: Meter movement repair source found Posted: Jun Mon 10, 2019 3:15 am |
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Joined: Jul Sat 23, 2011 9:33 pm Posts: 935 Location: Long Beach Ms. USA 39560
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The tiny hairsprings in moving-coil meters sometimes come loose from soldered connections. I was talking with a cellphone repairman who described repairing a common defect in a popular model of a popular brand cellphone. There are many connections on the bottom of a chip that can fail and which must be soldered with hot air, but one connection connects to a circuit board trace that almost always fails after the chip is replaced. The cure is to solder a wire to replace the trace. It has to be done under a microscope.
I described the hairsprings in a moving-coil meter and he said it would be an easy job under the microscope to reattach a solder joint. Your local cellphone repairman should be able to fix the hairsprings in a failed meter which cannot be otherwise economically replaced if you disassemble the meter for him and remove the magnet. Another option would be to find a web site with the meter theory for him or her to view.
The impossible again just takes a little while.
_________________ Pat W5THT Unhappy tubes blush while unhappy power FETs scatter plastic
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Johnnysan
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Post subject: Re: Meter movement repair source found Posted: Jun Mon 10, 2019 3:53 am |
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Joined: Jan Thu 01, 1970 1:00 am Posts: 18576 Location: Albuquerque, NM 87123
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When he actually does the work, and charges you for repairs, let us know.
BTW, disassembling a meter and removing the magnet isn't always easy; that's like saying remove engine from car.
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Chris108
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Post subject: Re: Meter movement repair source found Posted: Jun Tue 11, 2019 12:02 am |
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Joined: Jun Fri 19, 2009 6:34 pm Posts: 8929 Location: Long Island NY
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If you have the tools, patience, clean room, and steady hands necessary to fully disassemble and reassemble meter movements, why would you need a cell phone repairman to solder the hairspring?
_________________ "Hell, there are no rules here--we're trying to accomplish something!"
Thomas A. Edison
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