VEB Röhrenwerke RFT Konkret 600

Serial number	004299
Accessories	Pouch
	Original cardboard box, pretty worn
	Power supply, 220V AC, s/n 047441
	3x Manual: Elektronischer Taschenrechner konkret 600 Bedienungsanleitung (36 pages, german, dated 1977 and 11/1978)
	2x Garantieurkunde, dated Nov 2, 1978, Berlin
	A 3-page sheet with an evaluation of the capabilities and the precision of the konkret 600. Written by the "Bereichsleiter PV" of the "Wissenschaftsbereich Numerik und Statistik". In the tester's opinion the konkret 600 performs badly.
Condition	Very good. The key labels have worn off a little bit. On the backside a sticker "DAW Berlin, Observatorium Tautenburg, Inv. Nr. 030 224". DAW stands for "Deutsche Akademie der Wissenschaften".
Repairs, Comments
Acquired	17.10.2003

Type, Precision, Input mode	Scientific, 7 BCD digits, exponent ±99, Reverse Polish Notation
Programmable	No
Memory	1 storage register, not permanant.
Display	10 digit 7 segment red LED., 3 digits reserved for the exponent. A negative mantissa or exponent is indicated by a small dot.
Hardware	Processors K145IK4P and K145IK3P (UdSSR), 7-segment display VQD 30
Special features	3-level RPN. After power on the stack registers contain random non-numeric values.
Original Pricing, Production	Made by VEB Röhrenwerk Mühlhausen, IM Kombinat, VEB Funkwerkstatt Erfurt. Introduced around 1974. According to MOSCOW the identical Elektronika B3-19M was built between 1975 and 1979 and sold for 240 Rubles.
Batteries	4x built-in NiCd accu cells or special external power supply.
Dimensions	Length 16.6cm, Width 8.4cm, Height 4.1cm
Links	See Soviet Calculators.
Comment	The "C" key clears the entire stack, "Cx" only the x-register and "CF" the F-prefix key. Exponent entry is initiated by the "n" key. Identical to the Elektronika B3-19M.