Dual Heat Soldering Gun
(640-2187)                 Preparation                Faxback Doc. # 31994

For the best soldering bond:

  Tightly secure the soldering tip.

  Clean the surface you want to solder.

  Select the proper solder.

  Properly tin the soldering tip.


Securing the Soldering Tip

For the best results, you must tightly secure the soldering tip.  Using a
screwdriver, loosen the four screws located on the front of the soldering
gun, insert the supplied soldering tip into the receptacle at the end of
the soldering gun tip, then tighten the screws.

Periodically retighten the screws to insure the highest continuous heat
transfer.

Cleaning the Soldering Surface

To insure proper heat transfer, you must remove all non-metal substances
from the surface to be soldered.

  Use a wire brush or fine sandpaper to remove rust or paint.

  Use a cleaner/degreaser (such as Cat. No. 64-4322) or alcohol to remove
  grease or oil.

  Use steel wool or fine sandpaper to clean conductors and tarnished
  terminal surfaces.

  Use a pencil eraser to clean plated surface conductors.

Selecting Solder

Before you begin soldering, you must select the proper type of solder.

Use rosin core solder on radio and electrical connections.

NOTE:  This and other types of solder, such as for mechanical connections,
       are available at your local Radio Shack store.

Tinning the Tip

For better solder connections and longer tip life, tin (cover) the
soldering gun's tip with a coating of rosin core solder each time you use
the soldering gun.

1.  Plug the soldering gun's power cord into an AC outlet.

2.  Press and hold the trigger for about 8 to 10 seconds to heat up the
    tip.  The bulb lights while you press the trigger.

    WARNING:  Do not touch the tip with your hands.  It is very hot!

3.  When the tip gets hot, carefully apply a light coating of new
    solder to it.

NOTES:  If you apply too much solder, wipe the tip with a damp sponge to
        remove the excess.

        Re-tin the tip frequently for continued heat transfer.

        Keep the tip clean.  To remove the oxide that builds up on the
        heated metal surface of the soldering iron tip, occasionally wipe
        the tip on a moist sponge pad and re-tin the tip.

(EB 4/17/96)
(LB 3/27/96)