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History of the manufacturer  

Marconi Instruments, Marconi-Ekco (MI, MEI)

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Name: Marconi Instruments, Marconi-Ekco (MI, MEI)    (GB)  
Abbreviation: marconi-in
Products: Model types Others Brand

Marconi-Ekco Instruments Ltd.
Electra House, Victoria Embankment, London WC2, England (1936)

Marconi Instruments Ltd.
Longacres, St. Albans, Hertfordshire, England

Marconi Instruments (formerly Marconi-Ekco, MEI), also known as MI, was a manufacturer of electrical measuring and testing instruments, including automatic testing equipment. They made signal generators, oscilloscopes, voltmeters, spectrum analysers and other products.

For a short time in the 1930s, MEI also fabricated valves/tubes under the label "Marconi-Ekco".

MI had many dependencies around the world that catered the local markets mostly as distriubutors and service organizations. The USA branch, Marconi Instruments, Inc. (MII), released a series of models specifically designed for the USA - details about place of design and manufacture are not known at this time).

Please see this forum article for a list of addresses and names of local companies.

Founded: 1936

In 1936, Marconi's Wireless Telegraph Company and E.K. Cole Ltd. (EKCO) form a jointly-operated company to be called Marconi-Ekco Instruments Ltd. with a nominal capital of £5,000. The manufacture of electrical measuring and testing instruments of EKCO and Marconi is taken over by the new company.

The name of the company is changed to Marconi Instruments Ltd. in 1941/1942 after E.K. Cole sold the whole of its share interests.

Due to the acquisition of Marconi's Wirless Telegraph Co. by English Electric Company Ltd. (UK), Marconi Instruments becomes part of the latter in 1946.

In 1968, GEC (UK) buys English Electric. Marconi Instruments is sold to IFR Systems Inc. (USA) in 1998.

Aeroflex Inc. (USA) acquires IFR Systems Inc. in 2002 and is itself taken over by Cobham plc (UK) in 2014.

This manufacturer was suggested by Konrad Birkner † 12.08.2014.

Some models:
Country Year Name 1st Tube Notes
GB  69 Signal Generator TF 995B/5 6AK5  AM/FM Signal Generator 0,2 MHz - 220 MHz 0,1 µV - 200 mV; BNC-connector. 
GB  42 Wavemeter T.F. 643 A HL23  Ondametro della Marconi Cerco schema The instrument was supplied with2 valves - one a spar... 
GB  60 Universal Bridge TF2700 ACY17  LCR-Messbrücke. Messbereiche: Kapazität 0,5pF-1100µF, Induktivität 0,2µH-110H, Widerstand ... 
GB  61 Carrier deviation meter TF791D 6CD6G  cet appareil était utilisé par l'aéroport de dorval. 
GB  61 FM/AM Signal Generator TF995A/5 6AK6  Frequency Range 1.5 MHz - 220 MHz in 5 Bands : Band 1    1.5 - 13.5 MHz ... 
GB  64 Sensitive Valve Voltmeter TF2600 6CB6  Voltmeter von 1 mV···300 V (-60···+50 dB) in 12 Stufen schaltbar. 
GB  64 TF2333   Modular set, made of: MF/Oscillator, MF/Attenuator, level meter.Apparecchio modulare conte... 
GB  66 Distortion Factor Meter TF2331   Distortion- and AC mV Meter, 20 Hz to 20 kHz, 1 mV to 30 V, asymmetric input (600 Ohm/H... 
GB  66 Electronic Voltmeter TF2604 12BH7  Tube Voltmeter. Ranges: Voltage 0.3/1/3/10/30/100/300 V AC/DC, 1000 V~; Resistance 0.1/1/1... 
GB  70 RF Electronic Voltmeter TF2603   Transistorised version. Useful from 10 kHz to 3000 MHz. Sensitive to 0.1 mV. Ranges from 1... 
GB  79 Universal Counter Timer 2437   General purpose frequency and period counter. Frequency range to 100 MHz. 8 digit LED. (Th... 
GB  64 MF/HF AM Signal Generator TF2002   Marconi’s TF867 has been a standard for many years but it is now tending to be replaced by... 


Further details for this manufacturer by the members (rmfiorg):

Marconi catalogue "Electronic Measuring Equipment" 1970tbn_gb_marconi.jpg
Marconi Katalog 1970tbn_gb_marconi_bus.jpg
Katalog 1970tbn_gb_marconi_sales.jpg
Marconi Catalogue 1970tbn_gb_marconi_sanders.jpg
Service Manual von ca. 1963tbn_uk_marconi_addresses.jpg

Forum contributions about this manufacturer/brand
Marconi Instruments, Marconi-Ekco (MI, MEI)
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Marconi Instruments international branches
Mark Hippenstiel


Marconi Instruments
44 New St, New York, NY (1956)

Marconi Instruments, Division of English Electric Corp.
111 Cedar Lane, Englewood, NJ 07631 (1963)

Marconi Electronics, Inc.
500 Executive Bd, Elmsford, NY 10523 (1971)
100 Stonehurst Co, Northvale, NJ 07647 (1978)

Marconi Instruments, Division of Marconi Electronics, Inc.
100 Stonehurst Co, Northvale, NJ 07647 (1978)

Marconi Instruments, Inc.
3 Pearl Court, Allendale, New Jersey 07401 (1991)


Canadian Marconi Company
Marconi Building, 1442 Trenton Ave, Montreal, QC (1956)


Marconi Instruments, succursale de France
40 Rue de l'Aqueduc, Paris 10e (1963)

Marconi Instruments S.A.
18 Rue du Plesses-Briard le Canal Courcouronnes, 91023 Evry cedex (1991)


Marconi Messtechnik GmbH
Wolfrathshauser Str. 243, 8 München Solln (1963)
Landsberger Str. 65, 8034 Germering (1991)


Marconi Instrumenten
Van Limburg Stirumlaan 4, 5037SK Tilburg (1991)


Marconi Instrumentos S.A.
C/ de Gobelas 13, Urbanizacion "La Florida", 28023 Madrid (1991)

Hong Kong:

Marconi Instruments Ltd.
Rm 702-3 CC Wu Building, 302-308 Hennessy Road, Wanchai (1991)


Marconi Instruments (Pty) Ltd.
Level4, 15 Orion Road, Lane Cover NSW 2065 (1991)

Marconi Instruments, Marconi-Ekco (MI, MEI)
End of forum contributions about this manufacturer/brand


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