Build a Cigar Box Battery Box for Tube Radios

Step 4 Adding the terminals and final assembly.

Drill six evenly spaced holes in the front of the cigar box to attach the Fahnstock clips or Binding Posts, which ever you are using. Use a machine screw and nut to attach the clip to the front of the box and a solder terminal to the other side at each of the holes.

Solder the negative lead of the D-cell battery tray to the first terminal, left most. Solder the 3volt center tap to the second and the other end of the battery tray, +6 volt, to the third terminal. These well be the A-Battery connections.

Solder the negative wire from the B-Battery to the 4th terminal, solder the +45 volt wire to the 5th terminal and finally solder the +72 volt wire to the 6th terminal. Use some pieces of electrical tape to secure the loose wires to the inside of the box.

Use a pen and label the connections on the front of the box.

Done. Notice there is a lot of excess room in the box, this would be a good place to store wires to connect the battery box to what ever you are powering and also add more batteries. If I was to do this again I would have gotten two more batteries so that i could have had a 90 volt B-battery as well and also I might in future add a single D-cell holder to have a 1.5 volt A-battery as well making the battery box even more usefully for powering homebrew radios.