EverReady PP11

The EverReady PP11 battery was popular in the early 1960's and comprised of 2x3 cell piles wired to a 4 pin socket. The radio would normally have the 4 pin plug wired so as to produce 9 volts with a centre tap at 4.5 volts. With this arrangement it was possible to run the 2 output transistors without the necessity of a large low voltage electrolytic capacitor in series with the speaker voice coil.

Just right click your mouse on the required version and select "Print Target" or save to your computer by selecting "Save Target As..." then print it out. 

If you set your printer resolution to 300 dpi it should be printed full size. (When completed the battery should form a cube with sides 3.5" x 1.9" x 2.5" or 90 mm x 50 mm x 62mm).  Print it onto the thickest card your printer can handle, cut around the whole shape, crease where necessary and glue all but the top flaps together. The batteries I used were 3 cell batteries with brass strips for terminals (easy to solder to) , one longer than the other, which fit neatly inside with the help of a bit of expanded polystyrene padding. If these are not available in your country then you may have to use 6 'C' cells. Fabricate a 4 pin plug and socket (a pair from an old valve radio battery should be ok).