Homebrew PCBs

On 21/07/2010 17:41, Alessio Sangalli wrote:
> On 07/21/2010 09:29 AM, designer_craig wrote:
>> I have very good luck with elctroless tin.  The formula I use came
>> from the September 1971 issue of Ham Radio magazine.
>>
>> .5g Stannous Chloride 2.0g Thiourea 3.0g Sulfamic Acid 100.0 mL
>> Distilled water
>
> Where do you get the chemicals? Also, do you have a very precise scale?
> My kitchen scale can theoretically meausure with the precision of one
> gram but how can I trust it for such small quantities?
>
> Do you have pictures of the process?


Mega Electronics can supply a big bottle of tinning powder, presumably 
made from those ingredients. I've got one but haven't tried it. It just 
needs to be mixed with water.

Leon
-- 
Leon Heller
G1HSM