How do you solder Threaded Couplers to push cable? Any tips Please. What kind solder and Flux to use?
Will epoxy work better.
Thank
G

don't expoy them. They'll come off eventully. Threaded coupler are not a good idea either. it can be done but using smooth couplers is a better choice. I just use electrical rosin core solder and elcrical flux. Put some flux on the calble and apply solder to it and let the solder wick into it. then do the same to the coupler. Heat the coupler and slowly push in the cable and your done.
You only need to do this to one end. the other end use a quick connector [link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXK098&P=0]screw lock[/link]. cut the cable an inch loger than needed and add some solder to the end to keep it from unraveling and push it through one of these

Thank you, Thank you Thank you, Thank you!!!!
G

Silver solder might be a better choice to solder them together with. Electrical solder is not as strong as silver and may fail. Good Luck, Dave

Be sure to scuff the cable with sandpaper. It MUST be bright and shiny for the solder to hold.

Dr.1

In addition to what was said above. After you have applied the solder and removed the heat DO NOT MOVE THE PARTS. If you move the parts before the solder has cooled it will result in a cold solder joint. A cold solder joint is very weak and may very well fail in use. If the solder is dull looking after it has cooled you have a cold solder joint. The solder should be bright and shiny after it cools. If it's not, reheat the joint until the solder melts and then let it cool without disturbing it.

Ken

I agree with David, use silver solder and flux.

Don

Standard 60/40 or 63/37 electrical grade solder is plenty strong and requires a lot less heat and skill to apply correctly than silver solder.
RCKen is correct in the explaination of movement causing a cold solder joint. If you have to reflow the solder add more flux before you heat it again this will help the solder flow and prevent burning the solder. Use regular rubbing alcohol will clean the flux residue off of the cable and the connector. Flux will become sticky if left on the cable.

And do not try to accelerate the cooling by applying water or anything like that. Just let it cool at it's own natural rate.

And if you don't have a vise, a rubber band wrapped around the handles of a heavy pair of pliers works well.