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Old 12th August 2010, 06:30 PM   #1
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Default Which solder for audio?

Im no expert, im looking in some websites and i see 40/60, 62/66....what
does it mean and what is the difference?
I need good quality (but not those crazy expensive like Mundorf).
Its for soldering resistors and caps to an audio amp pcb.
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Old 12th August 2010, 06:48 PM   #2
SY is offline SY  United States
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Regular tin-lead with a small (2-4%) silver content if you're dealing with silver wire or terminals, 63/37 for anything else. Anything more exotic than that is hype.
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Old 12th August 2010, 06:55 PM   #3
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Amen
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Old 12th August 2010, 07:22 PM   #4
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Quote:
Originally Posted by SY View Post
Regular tin-lead with a small (2-4%) silver content if you're dealing with silver wire or terminals, 63/37 for anything else. Anything more exotic than that is hype.
I have gold plated terminals, no silver wires (from what i know).
What is 63/37? don't i need audio grade for the amp? if so, than what brand?
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Old 12th August 2010, 08:04 PM   #5
Trebla is offline Trebla  United Kingdom
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It's 63% tin and 37% lead, but it's probably not worth worrying about.
Better to acheive a good join with any old solder, than a poor one with designer stuff.
I'm afraid i don't know what audio grade solder is.

To be fair though, some solders are nicer to use than others. So you are bound to get some recommendations.

Last edited by Trebla; 12th August 2010 at 08:18 PM.
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Old 12th August 2010, 08:32 PM   #6
SY is offline SY  United States
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Quote:
Originally Posted by Trebla View Post
I'm afraid i don't know what audio grade solder is.
Regular solder with a high price tag and a story.

I'd recommend Kester 44, Ersin Multicore, or (heaven help me) Radio Shack silver-bearing. Really, any "name" brand non-audiophile solder will work fine, some slightly better than others in some applications.
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Old 12th August 2010, 08:36 PM   #7
LeonvB is offline LeonvB  Netherlands
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60/40 is the composition of the solder. Normally the default meaning is the Tin/Lead content in a percentage, or with the chemical symbols and the percentage if otherwise. So added together it should be 100, meaning 62/66 does not exist.

Nowadays I'm using Sn95Ag4Cu1 from Stannol. It's leadfree and silver based, so you can use it on almost anything including plating containing silver and it's almost the same as 'exotic' solders while costing much, much less (Mundorf is 95.5%Sn/0.7%Cu/3.8%AgAu (AgAu=99%Silver1%Gold)). Very easy to use, good flow. Very strong joins.

I agree that for anything not requiring silver content you could use much cheaper solders like Sn99Cu1. I would avoid lead based solders, but for DIY it's an obvious choice as you probably have some lying around and even if you don't it's still a little cheaper (but not that much).
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Old 12th August 2010, 09:09 PM   #8
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Mine says 40/60, does that mean 60% lead? and why is lead bad?
Do i need silver in the solder?
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Old 12th August 2010, 09:13 PM   #9
hispls is offline hispls  United States
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I'd love to see any double-blind tests where anyone can "hear" the difference between lead/tin and silver/gold solder. LMFAO, I'm pretty certain that you would need incredibly precise equipment to see any difference whatsoever (and I mean reading thousandths of an ohm).

Electrons probably don't care too much how much you paid for your solder when they're flowing through it.

The only real downside with lead is it's toxicity AFAIK
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Old 12th August 2010, 09:15 PM   #10
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Originally Posted by hispls View Post
I'd love to see any double-blind tests where anyone can "hear" the difference between lead/tin and silver/gold solder. LMFAO, I'm pretty certain that you would need incredibly precise equipment to see any difference whatsoever (and I mean reading thousandths of an ohm).

Electrons probably don't care too much how much you paid for your solder when they're flowing through it.

The only real downside with lead is it's toxicity AFAIK
So...just look for any lead free solder?
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