DATAMATH

DATAMATH CALCULATOR MUSEUM

Texas Instruments BA II Plus Professional

Date of introduction:	January 2014	Display technology:	LCD dot matrix
New price:	$54.99 (SRP 2014) $70.00 (SRP 2020)	Display size:	3 alpha + 10 (7+2)
Size:	6.1" x 3.2" x 0.6" 156 x 81 x 15 mm³
Weight:	5.3 ounces, 151 grams	Serial No:
Batteries:	CR2032 (60µA)	Date of manufacture:	mth 06 year 2014 (A)
AC-Adapter:		Origin of manufacture:	China (K)
Precision:	13	Integrated circuits:
Memories:	10
Program steps:		Courtesy of:	Joerg Woerner

The original BA II Plus Professional was announced together with a new line of graphing and symbolic calculators including the TI-84 Plus, the TI-84 Plus Silver Edition, and the TI-89 Titanium early in 2004. About ten years later, production of the BA II Plus Professional was not only shifted from Inventec Corporation to Kinpo Electronics, Inc., but the design and internal construction was dramatically changed, too. The changes are a give and take, gone is the beautiful brushed aluminum front but we welcome the larger display font.

Disassembling the featured BA II Plus Professional with Date code K-0614A and manufactured in June 2014 by Kinpo Electronics in China reveals a solid internal construction centered around an unknown single-chip calculator circuit and powered by a CR2032 battery. The two small metal plates inside housing of the original BA II Plus Professional to increase the calculators weight are consolidated into one larger metal plate, resulting in a hefty feel of the calculator.

Inspecting the printed circuit board (PCB) of this BA II Plus Professional calculator brought our attention to a small mark reading BF18-10-2, we noticed similar marks already with other Slide Rule calculators manufactured by Kinpo Electronics and started compiling a list of the PCB-Marks on calculators manufactured by OEMs for Texas Instruments.

If you have additions to the above article please email: joerg@datamath.org.