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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)    (ZZ)  
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
ZZ  10 Bobine de Rhumkorff   Génératrice de haute tension pour expériments. High Voltage generator for experimental ... 
ZZ  55 FM Deviation Meter TF 928   Marconi FM Deviation Meter Type TF 928 Carrier frequency range 20 to 100 Mc (to 500 ... 
ZZ  63 20Mc/s Sweep Generator TF1099 6BH6  20 MHz sweep generator. Designed for the alignment of television transmitter and studio... 
ZZ  62 TF1065A OC44  Transmitter and reciever test set.  Transistors: 2x OC44, 1x GET102 or ACY17.  B... 
ZZ  72 mi Counter / Timer TF 2416 TF 52416-900X   Max. frequency at input A: 50 MHz Max. frequency at input B & C: 5 MHz 
ZZ  76 mi FM/AM Modulation Meter TF2304   The TF 2304 FM/AM Modulation Meter incorporates automatic tuning over the carrier frequenc... 
ZZ  60 FM/AM Signal Generator NR18 MK II TF995A/3/S 6AK5  Militärausführung, die auf dem Modell TF995A/2M basiert. Die wesentlichen Änderungen ... 
ZZ  60 AC Microvoltmeter TF-1075   OC44 transistors 
ZZ  51 Variable Attenuator TF338B   For Audio and low-frequency use. Variable from 0 to 105 dB. Impedance is approximately 6... 
ZZ  75 AF Oscillator TF2102M 52102-025T   General-purpose AF sinewave source covering 3Hz - 30kHz 
ZZ  65 mi Digital Multimeter TF2670   Digitales Multimeter für Gleichspannung, Wechselspannung, Gleichstrom, Wechselstrom ... 
ZZ  56 Signal generator TF 937/1 12/2 CV2235  A British Army signal generator covering the range 35 kc/s to 18.3 Mc/s in 8 bands/rang... 


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