World's worst soldering ?

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So, no solder pads on the back? I thought a plated-thru hole had to have copper on both sides. Further, I would think that even the simplest board would be asymmetrical. Is the phasing messed up? Left and right channels switched?

board

So, no solder pads on the back? I thought a plated-thru hole had to have copper on both sides. Further, I would think that even the simplest board would be asymmetrical. Is the phasing messed up? Left and right channels switched?

Does the plate-through process need metal either side? This board has metal on one side only , I was only assuming it must be plated through. Set up as A and B so difficult to say but A side amp corresponds to A side outlets but then L & R are often swapped as far as "viewing" from the front.

It was most likely some little child, not in school where he/she belongs, slaving at the assembly plant with make shift tools, trying to earn enough to get rice for today's meal at home.

Jamie

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Plating through requires at least one side to be metallized to provide elec= trical contact for plating current. A board is drilled and sensitized then = plated through all before the circuit process is started. It is unlikely th= at a true 'single sided' board would have plated through holes simply becau= se the sensitizing and pre-plating of the holes would also plate the bare s= ide of the board.=20 I would suggest that the wires were put through the 'wrong' way and the sol= der application had little chance of making any connection whereas if they = were put through the correct direction the connection would have been fine.= Sloppy supervision and QA [if there was any].

Neil S.

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Plating through requires at least one side to be metallized to provide electrical contact for plating current. A board is drilled and sensitized then plated through all before the circuit process is started. It is unlikely that a true 'single sided' board would have plated through holes simply because the sensitizing and pre-plating of the holes would also plate the bare side of the board. I would suggest that the wires were put through the 'wrong' way and the solder application had little chance of making any connection whereas if they were put through the correct direction the connection would have been fine. Sloppy supervision and QA [if there was any].

Neil S.

I cannot see plating as being able to carry much current compared to normal even 1oz cu covered board. There was another problem in the ps that probably related to plate-through and inability to carry current to a 2W resistor . Traces on both sides of this board, soldering one trace from the blind side as impossible to get a soldering iron in , on the correct soldering side, and this join had "burnt"