Eric J. Lever
33, Clerkenwell Green, London EC1. (1924 – 1927)          

Eric J. Lever (Trix) Ltd.
33, Clerkenwell Green, London EC1. (1927 – 1928)
8-9 Clerkenwell Green London, EC1. (1928 -1933)

Trix Electrical Co., Ltd.
8-9 Clerkenwell Green London, EC1. (1933)
218, Great Portland Street, London, W1 (1938)

1-5 Maple Place, Tottenham Court Road, London, W1. (1960)

Trix Electronics Ltd., a subsidiary of Ultra Electronics. Ltd.
1-5 Maple Place, Tottenham Court Road, London, W1. (1962)

Brand:Trix

Eric J. Lever manufactured radio components from 1924 and added portable radios and kit sets in 1926,  Amplifiers, and Public address equipment from 1930. Amplifiers and aircraft audio systems in 1958 and were acquired by Ultra Electronics in 1961.
They continued manufacturing the Trix branded products until the late 1960s.

Eric J. Lever started manufacturing radio components and hardware and sold them wholesale to dealers in 1924. [1]
On the 25th of June 1925 Lever was granted the “Trix” trademark. [2]

The company manufactured transformers, coils, condensers, and most hardware products for radio manufacture including batteries. Also, kit set radios and portables.

In January 1926, they produced an illuminated crystal detector for which the patent had been applied.

In October 1927 the wireless and electrical manufacturing business of Eric J. Lever & the registered Trademark “Trix” was acquired by the private company Eric J. Lever (Trix) Ltd. with S. J. Levi as Managing Director & Chairman. [3]

The company continued to manufacture components and a large variety of portable radios. In 1930 they added radiograms audio amplifiers to their production and a description of their products displayed at the September Olympia Exhibition was described in the Wireless & Gramophone Trader:

STAND No. 249.

The "Trix" exhibits to be shown at Olympia fall broadly into three groups- amplifiers, receivers, and accessories. Three amplifiers will be available, at prices from about £25 to £50 each. The instruments are totally enclosed in iron cases and are entirely AC mains operated.
The 25-watt model has an LS.6 A output with 400 V HT, and is intended for use in cafés, dance halls, etc. The 60-watt model is very much more powerful, and is suitable for cinemas and outdoor work, while the 10-watt DC model is for average use where DC only is available.

The receivers comprise the well-known "Trix" 5-valve portable with its "mains or battery feature (17 guineas plus royalty), a new 22 guinea 4-valve Screen Grid portable incorporating the features of the above set, but with the advantages of the SG stage, and the "Combinola." This is an electrically driven radio gramophone, the radio portion of which is in the form of a portable set which may be removed and used separately. Good volume is ensured by the use of a super-power valve, and the instrument sells at 55 guineas complete.

In addition, a new design of an all-mains, AC receiver will be shown.
The accessories mentioned above include an entirely new combined HT eliminator and trickle charger having a charging rate of 1.3 A, and a complete series of "Trix" components. The requirements of manufacturers will also be catered for. [4]

In mid-1933 the company name changed to Trix Electrical Co., Ltd. at 8-9 Clerkenwell Green, with the same phone number CLErk 3014/5.

The company began concentrating on manufacturing sound equipment amplifiers with gramophone and radio attachments, microphones, mixers & Loudspeakers. [5]

In September 1937 they completed a contract for a complete amplifying system installed in the London Stock Exchange. The equipment included multiple loudspeaker points throughout the building, with double-channel amplifiers and radio and microphone inputs. They were called upon at less than an hour's notice to provide Public Address equipment in the Stock Exchange on the abdication of King Edward VIII. [6]

At the sixteenth Radiolympia Exhibition in September 1949, their products were mentioned in Practical Wireless as:

Stand No. 101

Sound reproducing. equipment of all types, from portable, battery-operated, 5-watt amplifiers to rack-mounted installations of several hundred watts output, which are used in such diverse locations as railway stations, hospitals, ships, and factories.

Also on show will be the very latest model of the Intervox AC /DC inter-communication equipment.  [7]

In 1958 they manufactured Trixadio Passenger Announcement system installed on the Comet IV. [8]

In July 1961 Ultra Electronics Ltd. acquired Trix Electronics Ltd., which since incorporation on 1st May has been a subsidiary of the Trix Electrical Company. Trix Electronics will continue to manufacture and install sound amplification equipment for public address and aircraft work. [9]

The company manufactured and installed PA equipment in Great Britain and overseas.

The Hilton Hotel, Trinidad in 1962. [10]
Parliament Buildings Kuala Lumper, Malaysia in 1963. [11]
National Coal Board, Hobart house London, 1963. [12]

In 1964 they developed Sappo vehicle-mounted audio equipment to disperse birds from the aircraft runway.[13]

A durable and low easy-to-install glass fibre horn for public address installations was manufactured in April 1964. [14]

Trix equipment was displayed at the International Golden Jubilee Public Address Exhibition at Royal Festival Hall in March 1965.

There was an extensive range of Trix sound equipment for innumerable applications on the Ultra Electronics stands 66 and 67. Innovations include Model RA.108 radio amplifier, a combined FM radio tuner and 8-watt amplifier, Model B.66 portable battery-operated transistorized PA system, all self-contained in the 37 in. column speaker, and several microphones, including the G7852/FP priority microphone, on desk stand. [15]

[1] Amateur Wireless May 24, 1924, Page 655.
[2] Electrical Review Jul 11, 1924, Page 62.
[3] Electrical Review Oct 14, 1927, Page 640.
[4] Wireless & Gramophone Trader Sep 13, 1930, Page 294.
[5] Sight & Sound Spring 1934, Page 6.
[6] Popular Wireless Sep 11, 1937, Page iii.
[7] Practical Wireless Oct 1949, Page 397.
[8] Wireless World Dec 1958 Page 609
[9] Wireless World Jul 1961, Page 350.
[10] Wireless World Mar 1962 Page 116.
[11] Wireless World May 1963, Page 219.
[12] Practical Wireless  Nov 1963, Page 599
[13] Practical Wireless  Jan 1964, Page 811.
[14] Wireless World Apr 1964 Page, 190.
[15] International Broadcast Engineer Mar 1965, Page 273.