[Hallicrafters] Off-subject / soldering

[Waldo Magnuson]

I know this is off subject but I know there are flyers and machinist on the forum.
I need to replace the step retract cable on my Bonanza and would like to use the in-place cable to pull the new cable from the nose gear to the aft fuselage.  I need to butt solder the new-to-old cable but am having trouble getting silver solder to flow.  Does anyone have a suggestion.  Thanks.
73,  Skip  W7WGM