General view

F-3020

Electromagnetica

Manufacturer
Electromagnetica
Year
Unknown
Category
Telecommunications
Type
Multiplex equipment
Documentation score
1/5
Last edited
03 OCT 2026

Specifications

Capacity
12 analogue channels
Transmission
channels 0.3–3.4 kHz; line spectrum 12.3–56.6 kHz, +4 dB, 135/150 Ω; trunks up to 1,000 km
Power supply
220 V AC and 24 V DC (buffer battery)
Environment
−35…+55 °C

Sources: [1][3]

Description

The F-3020 is a 12-channel analogue military multiplex trunk system, made by Electromagnetica in Bucharest [1]. It was designed by ICSITA with the Special Production Factory, as a long-distance communication trunk [1][2].

Known as the ‘heavy-cable trunk’, it comprised 12-channel terminal stations (F-3020 SF), attended and unattended repeater stations (F-3020 SAD, F-3020 SAN), a three-channel branching unit (F-3020 ER) and a portable test set (F-3020 EPCM); a trunk could be up to 1,000 km long, in sections of 400 and 200 km, each 400 km needing two terminal stations, 7 attended and 32 unattended repeaters, with 10–12 km between repeaters [3]. All its units were accepted by the Warsaw Pact armies, and it was tested with very good results by the Signal Training Centre [3][4].

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Schematics

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Documents

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References

  1. [1]N. Millea (coord.) et al. – „Electronica românească. O istorie trăită”, vol. II „Electronica profesională”, AGIR, section V.1.4.1 „Întreprinderea Electromagnetica”, pp. 427–437
  2. [2]N. Millea (coord.) et al. – „Electronica românească. O istorie trăită”, vol. II „Electronica profesională”, AGIR, section V.1.8 „Tehnica de transmisiuni produsă de industria românească”, pp. 451–452
  3. [3]N. Millea (coord.) et al. – „Electronica românească. O istorie trăită”, vol. II „Electronica profesională”, AGIR, annex V.2.1 „Produse de tehnică pentru transmisiuni fabricate la Electromagnetica”, pp. 702–709
  4. [4]N. Millea (coord.) et al. – „Electronica românească. O istorie trăită”, vol. II „Electronica profesională”, AGIR, section V.2.2 „Institutul de Cercetare Științifică și Inginerie Tehnologică al Armatei – ICSITA”, pp. 456–462