Soldering to brass?

Snoogles

Cranky-dologist
got a brass spring claw and it wont take solder
is this normal? is there a special technique to get the solder to fuse to the brass?
i tried scratching up a small area with sand paper. but it still wont hold
 
Re: Soldering to brass?

Takes a lot of persistence!!! Scratch up a section and you'll eventually get there.

The alternative is the Killer Guitar Components Brass Claw. More expensive, but its a milled piece of brass (not thin press bent brass) and has a lug you can attach the ground wire, negating any soldering to the claw.
 
Re: Soldering to brass?

It's tricky, for sure. Even getting the thick brass wire that grounds the bridge in a LP I had problem attaching to the pot. Ended up using A LOT of solder.
 
Re: Soldering to brass?

Scratch the surface with an utility knife and use a separate flux paste. If that doesn't work, you will probably need plumbers solder, it is 97/3 I believe not the regular 60/40 or 63/37.

Be sure to tin the claw first, then solder the ground wire. Make a nice pool first.
 
Re: Soldering to brass?

It's tricky, for sure. Even getting the thick brass wire that grounds the bridge in a LP I had problem attaching to the pot. Ended up using A LOT of solder.

Very, Very bad!!!

Making a strong physical connection is not the same as making a good electrical connection. Better to learn how to do something yourself before giving advice on it.

If you're using "a LOT of solder", you've done it wrong and may eventually (if not already) have problems (from what you say, you've already had problems, even with a simple task). A good solder job needs a HOT iron so the solder flows thin like water. A bad connection is NOT made better simply by adding more bulk of solder.
 
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Re: Soldering to brass?

Very, Very bad!!!

If you're using "a LOT of solder", you've done it wrong and may eventually (if not already) have problems. A good solder job needs a HOT iron so the solder flows thin like water. A bad connection is NOT made better simply by adding more bulk of solder.

Tell me something I don't already know. Tried several times to do it clean. Problem was that damn DPDT-pot, incredibly hard it make the thick wire stick. There are no real protrusions on the main "box" and the large, flat sides are prone to heat dissipation.
 
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Re: Soldering to brass?

If cleaning and roughening the surface and using flux doesn't do it, you need a hotter iron. A little heat left on the metal for a long time is not only a recipe for disaster, but it will leave you with a bad electrical connection. A lot of heat in a small area for a short duration is has the least potential for harm and the greatest potential for success. And remember..."meat follows heat". Heat the most bulk of metal (back of pot) and touch the solder to the hot metal so it will flow wherever there is sufficient heat. Heating the solder and letting it drip onto the metal is just wrong.
 
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