[sdiy] Transition to Lead-Free Hand Soldering

Tom Bugs admin at bugbrand.co.uk
Fri Aug 20 22:24:50 CEST 2021

As far as I'm aware it is the other way around to what Jay says --- 
lead-free solder should not be used on leaded boards, but leaded solder 
is fine on either.
As others have noted, do not use lead-free solder for repairs on old 
leaded equipment.

On 20/08/2021 21:12, Vladimir Pantelic via Synth-diy wrote:
> On 8/20/21 10:07 PM, Jay Schwichtenberg via Synth-diy wrote:
>> One thing I haven't seen mentioned here is the PCBs. There are 
>> various coatings used for the solder pads, this only applies for the 
>> solder tinned ones. So, my understanding (correct me if I'm wrong 
>> here) here is that you can solder lead tinned boards with lead free 
>> solder but you can't solder lead free tinned boards with leaded 
>> solder. So you'll have to know what your boards are tinned with and 
> all my "prototype" PCBs are lead free HASL and they solder just fine 
> with leaded solder - no idea if they will spontaneously explode in a 
> couple of years though...
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