IOWA CITY MODERATED FORSALE NEWSGROUP > Tools
> Power Tools
> 2007
> Cardas quad eutectic solder silver 20 grams 20 ft
Cardas quad eutectic solder silver 20 grams 20 ft
"ONLY THE HIGHEST QUALITY PARTS WITH THE HIGHEST QUALITY SERVICE"
US.....$1.90 (THEN $1.00 FOR EACH ADDITIONAL)
FIRST CLASS AIR MAIL IN A BUBBLE MAILER
EVERYWHERE ELSE....$3.00VIA AIR
THIS IS THE ROSIN FLUX TYPE CARDAS QUAD EUTECTIC SOLDER WHICH IS GOOD FOR MOST ALL APPLICATIONS.
This solder is removed from a bulk spool, it is therefore unmarked, but guaranteed to be exactly as stated. I stake my rep on that!
Q.) What is Quadeutectic solder? What percentage of each element does it contain; tin, silver, lead, copper?
A.) It is tin, lead, silver, copper eutectic. 61/35/3/1 is the approximate ratio. The key is a ratio that has several decimal points after each number. It is very precise in order to hit the "eutectic point". It took years to pinpoint.
Q.) I'd like to know what makes Cardas solder better than all other solders for audio work. What advantage does Cardas solder have over other eutectic solders that makes it worth its much higher price? On the one hand, there is Jennifer of Jena Labs claiming that no other solder should ever be used, and on the other hand there are people in DIY chat rooms that say these exotic audiophile solders are a waste of money and no better than products like Kester. Thanks for your response. - Michael
A.) Hi Michael. The vast majority of solders in the world are slurries or mixtures such as 60/40 tin lead solder. They go through a slurry stage as they solidify wherein one component solidifies first and then another. The result is a solder connection rather than a joint. Eutectic solders are in fact excellent because they solidify at a temperature lower than any of the component parts thus they form a solder joint rather than a connection - the key here is the eutectic formula which must be very precise - the solders are obviously different in that they set up with a mirror finish rather than a dull finish, the reason they do this is because they solidify as a unit. The week link in the solders is contamination - the molten solder easily dissolves other metals, this is no problem if you are soldering to a metal that is part of the eutectic mixture (such as tin or lead) you will get contiguous flow right in to the joint (easy to see) but if you solder to a dissimilar metal (such as copper or silver) you will see an obvious dulling at the connection where the eutectic formula fails and and the continuous joint becomes a connection. Cardas Quad Eutectic is tin, lead silver, copper, eutectic. The results are obvious. Most highend products use this solder and other cable manufactures have been using it for over a decade - to them it represents good sound and absolute reliability. - George (Cardas)
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