Híradástechnika PTK-1050

Date of introduction:  1979 Display technology:  LED-stick
New price:   Display size:  8 + 2
Size:  5.8" x 3.1" x 1.4"
 148 x 78 x 36 mm3
Weight:  6.4 ounces, 180 grams Serial No:  
Batteries:  BP6, BP7 Date of manufacture:  year 1979 or 1980
AC-Adapter:  AC9131, AC9132 Origin of manufacture:  USA (ATA)
Precision:  11 Integrated circuits:  TMC1501
Logic:  AOS - 4 Pending Operations, 9 ()    
Memories:  8    
Program steps:  50 Courtesy of:  Joerg Woerner

The Híradástechnika PTK-1050 does not only look like an early TI-57 Programmable, it's 100% identical.

This PTK-1050 is just one of various OEM calculators sold in the Seventies by Híradástechnika of Budapest, Hungary. We discovered so far:

A-100 Bowmar TX-1000
K-83 Bowmar 905
K-86 Bowmar 901B
K-106 Bowmar 901B
K-106P Bowmar MX-80
K-831 Bowmar MX-50
K-832 Bowmar MX-55
K-841 unknown
TK-835 Bowmar MX-140
TK-891 General Instruments EZ3500
TK-891-1 National Semiconductor 4520
TK-1023 National Semiconductor 4520
TK-1024 National Semiconductor 4640
TK-1072-1 APF Mark 56
PTK-1023 National Semiconductor 4525
PTK-1030 Texas Instruments TI-51-III
PTK-1050 Texas Instruments TI-57
PTK-1060 Elektronika B3-21
PTK-1072 Commodore PR-100
PTK-1072-1 APF Mark 90
PTK-1096 Texas Instruments TI-59
TI-57 LCD Texas Instruments TI-57 LCD
TI-57-II Texas Instruments TI-57-II

Please find more information about Híradástechnika calculators at the amazing Virtual Museum of Calculators.

Find a nice collection of program listings for the TI-57 on Laurent's website.


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© Joerg Woerner, December 29, 2015. No reprints without written permission.