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surface mount resistor advice, smt resistors vs through hole audio quality
post Mar 4 2013, 08:47
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Hi and thanks for reading this post.

I have a few blown one watt resistors i want to replace in my power amp and am thinking about using surface mount resistors.

Do you think this is a wise move switching from through hole to surface mount, has anyone done this and what are your experiences concerning sound quality changes.

Many thanks in advance. John.
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post Mar 6 2013, 14:23
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One point to consider - If the through-hole resistor made contact with a trace on the bottom of the board, and if you replace it with a surface-mount resistor that only contacts the top of the board, then you are depending on the through-hole plating, plus solder, if any, that fills the hole, for electrical contact. This could make for a very unreliable connection, especially if the act of removing the old resistor damages the through-hole.

In other words, don't do it.

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Glenn Gundlach
post Mar 7 2013, 04:43
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If the vias (those holes for the sole purpose of changing layers on a PC board) were unreliable, your computer absolutely would not work because it can't be done as a 1 layer board. I used to lay out PC boards and 2 and 4 layer boards are pretty common particularly in computers. The only time I find problems with the actual PC boards is from capacitor leakage that doesn't get cleaned off. At that it takes years to rot the board.

I agree with the "don't do it" advice but not because of the plated through holes on boards.

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