The tapes produced are unsuitable for Colossus and need to be copied.
Junior prints from a tape. It consists of a tape-reader, a steckerboard,
and an electric typewriter.
By steckering any character can be made to print any other character. Any
number of characters can be steckered to print the same character.
(b) Details of steckering.
The three upper rows of jacks carry the output from the reader.
The three lower rows carry the input to the typewriter.
Steckering is effected by plug cords.
Letters not steckered are printed normally (as Tunny letters, e.g. 5 as 5
not by actual figure shift).
Different letters to be printed alike are plugged into a common jack and
thence to the desired letter.
To common a large group of letters a Ring Common can be used.
The reader output has two jacks for each letter: a mere shorting plug in the
upper jack connects the letter to Ring Common RC 1; a plug in the lower jack
connects it to RC 2. RC 1, RC 2 can be plugged to any desired letters : if they
are left blank the letters commoned into them are printed as . , x respectively.
In a jack carrying input to the typewriter FS means literally figure shift;
5 means 5; similarly for CR etc.
Note : some Juniors have a different and much smaller stecker-board, unsuitable
for rapid steckering.
(c) The Typewriter.
This has three switches : "start"; "stop" and "insert". "Insert" causes the
whole machine to stop at the end of each line. The arrangement of these switches
The typewriter can be set to print in any width up to 60.