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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
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Mechanical failure of emitter resitor soldering - tips?
In the present case to avoid having to take this present so-called
"professional" amp-head apart. Failure due to inadequate soldering due to heatsinking of the resistor leads in the first place. I will deform the protruding leads with a pair of worn out end snips before re-soldering properly. Other occassions where replacing the resistors and obviously solder was affected by long-term heat then abraiding back along the traces and doing long soldering between extended lead length and traces. For vibration induced problems replacing with ceramic bead insulators between the resistor and board rather than just flapping about in mid-air. Any other tips ? particularly maybe tying together somehow particularly off the board, on end, vibrating / flapping resistors or vibration induced failure corrective repair in particular -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ |
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#2
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Mechanical failure of emitter resitor soldering - tips?
N Cook wrote:
In the present case to avoid having to take this present so-called "professional" amp-head apart. Failure due to inadequate soldering due to heatsinking of the resistor leads in the first place. I will deform the protruding leads with a pair of worn out end snips before re-soldering properly. Other occassions where replacing the resistors and obviously solder was affected by long-term heat then abraiding back along the traces and doing long soldering between extended lead length and traces. For vibration induced problems replacing with ceramic bead insulators between the resistor and board rather than just flapping about in mid-air. Any other tips ? particularly maybe tying together somehow particularly off the board, on end, vibrating / flapping resistors or vibration induced failure corrective repair in particular -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ Hi, Try to find a copy of Mil-spec. training manual for soldering. Tony |
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