Calculators: Handheld: Ricoh Ricomac RC-8F
||83mm x 135mm x 26mm
Weight 152g excluding batteries
|3V DC, 2 x AA size
batteries. It accepts an adapter (AD-8X, 0.24W) through a socket on the top side
on the far right.
||Two-piece case in
blue-grey and white smooth plastic. The raised keyboard surround is the
same as the base. It has a eyelet on the top left for a carrying
handle. A slightly titled green filter give a clean bright display
with a sculptured surround. They keys are a lovely oval shape, soft
but positive to use but the brown ones are a bit of an odd colour
choice. The company logo is moulded in its own recess whilst the
model number is printed in blue.
8 digit green VFD, with a ninth digit to
display negative, error and memory indicators.
||4 function calculator with
percentages, change sign and three function memory.
||Ricoh Company Ltd,
made in Japan. Serial No. (on battery cover) 7566-10 12377.
There is an additional recess on the back which in this example has a
sticker labelled "Section" and "Name" to be filled
in. Normally I would have thought this to be a purchaser's company
info, but it fits the recess perfectly. Do you have one similar?
|Solid enough calculator
with lovely keys and bright display. However, Input overflow and
lack of error recovery let it down. Original case is soft black
plastic with flip over top and popper closing in the middle of the
front. Large capacitor on the power rails makes the calculator switch
on and off gradually and just look at the resistor count!
||1 x cpu: Toshiba T3315 5C, 28
2 x transistors
7 x diodes
7 x capacitors
0 x SIL resistor arrays
31 x resistors
1 x transformer: UT0907 5C04
||The keyboard board
(fixed using five screws) (ref. 5326-2111B) sits on top of the main board
(75584 200A)and is joined by 16 stiff wires. The whole assembly just
sits in the case's four lugs and is prone to movement.
||Remove the two screws in the
battery compartment and the front easily hinges off from the bottom.
||The (CE) button is used to clear
last entry of a number and the (C) to clear the whole calculator.
||Overflow on number input is not suppressed,
typing in a nine digit number results in an overflow which is not
||An overflow error is flagged
with the answer displayed and "E" (whether positive or negative)
in the far left (ninth) digit and is not recoverable
||Divide by zero results in
"E" being displayed with zero result in the far left (ninth)
digit and is not recoverable
||There is automatic constant on
multiple and divide only
||Memory store is flagged by the
far left (ninth) decimal point and cancelled by double pressing the (MRC)
||Negative numbers are shown by a
"-" in the far left (ninth) digit thereby allowing full eight
digit negative numbers