Estron EA-80M 1380

Estron EA-80M

Estron calculators were manufactured in the electronics factory of the Kuusalu collective farm. Two basic models were produced – 8-digit and 12-digit versions, respectively, EA-80M and EA-120M. Both models had basic operations and one memory slot with actions to increase, decrease, recall, and clear.

The Estron factory had its own plastic extrusion division. Circuit boards were manufactured and assembled locally. Different types of non-Soviet "calculator-on-a-chip" were used, NEC, Rockwell, GI, etc.

Integrated circuit type: one-chip calculator, multi-key memory, General Instrument Corp. C-585, 1976 (7606)

Display indicator segments use diode-transistor logic (DTL) with МП26Б PNP germanium transistors, coupled with resistors, capacitors and diodes.

Dimensions: 245 x 170 x 65 mm.
Weight: 1,15 kg

Year of manufacture: 1977

Serial №: 1380

Manufacturer:
	Kuusalu kolhoosi näidis-abiettevõte Põllumajanduse Elektronaparatuuri Tehas "Estron" Kuusalu collective farm's supplement model factory of agricultural electronic equipment "Estron" Kiiu, Estonian SSR

Did you know ...?
... the Estron factory was a supplement company of the Kuusalu collective farm in Northern Estonia, near Tallinn. It was established in 1968 by three engineers from the 'Punane RET' radio factory located in Tallinn. The Estron factory was established in a rural area, away from the capital, in the small village of Kiiu, some 40 km from Tallinn. The engineers continued to develop what they were not allowed to do in a large, governmet-owned corporation - they developed their own product, the telephone central unit, which gained wide popularity. The Estron-100 telephone central unit with desktop hands-free telephones for a maximum of 100 users, became the most popular product of the Estron factory. A high-demand products were also the EA-80M and the EA-120M electronic calculators, potato pile temperature sensors, grain moisture meters, etc. Various types of electronic equipment for agricultural use was manufactured in the Estron factory for several years, until the Soviet economy system collapsed in the beginning of the 1990s. The Estron factory operated 23 years separately from the Soviet governmental command economic system, due of its ownership form. It was common in Estonian SSR for collective farms to have small supplement companies to support owners to manage on their main activity. But the Estron factory overgrew from its supplement status and became the main income and showcase for the Kuusalu farm.