Canon F-73

Date of introduction:  June 1982 Display technology:  LCD
New price:   Display size:  10 (8+2)
Size:  5.4" x 2.8" x 0.4"    
Weight:  2.7 ounces Serial No:  
Batteries:  2*LR44 Date of manufacture:  year 1982
AC-Adapter:   Origin of manufacture:  Japan
Precision:  11  Integrated circuits:  Toshiba T6711
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

The Canon F-73 followed the unique F-72 and replaced the foldable housing with a traditional landscape style design. The F-73 was introduced together with the almost identical F-73P adding a small program memory to the common scientific/statistical functions.

F-73_PCB.jpg (50098 Byte)Dismantling the F-73 is quite interesting, the inside story is 100% identical with the programmable F-73P, even the keyboard is complete. Marketing just closed the key openings of an existing calculator.

Canon introduced the F-73 and F-73P together with the Financial Manager and added later even a printing version with the Financial Printer.

Running Mike Sebastian's "Calculator forensics" on the F-73 gives a result of 9.0000278593. We know this number from a lot of later Texas Instruments calculators like the TI-30 SLR and the TI-31.

If you have additions to the above article please email:

Joerg Woerner, April 5, 2004. No reprints without written permission.