is a consumer electronics company founded by Sir
Clive Sinclair in
Cambridge ,
England (originally as
Sinclair Radionics in 1961) to sell
Hi-fi equipment,
Calculator s,
Radio s and other products. In 1966 Sinclair created but never sold the world's first pocket television. In 1972 they marketed the world's first pocket calculator, the
Sinclair Executive .
In the 1980s Sinclair entered the
Personal Computer market with the
ZX80 at £99.95, at the time the cheapest personal computer for sale in the
UK . In 1982 the
ZX Spectrum was released, later becoming
Britain's best selling computer, competing aggressively against
Commodore and
Amstrad . The combination of the 1984 failures of the
Sinclair QL computer and
TV80 , and the 1985
Sinclair C5 electric vehicle bankrupted the company, and a year later Sinclair's products were sold to Amstrad. Sinclair still exists today, continuing to market Sir Clive Sinclair's newest inventions.
On
25 July ,
1961 Sir Clive Sinclair founded
Sinclair Radionics in Cambridge,
England after raising funds to start the business by writing articles for ''Practical Wireless'' magazine. Sinclair Radionics developed hi-fi products, radios, calculators and scientific instruments. In 1963, Sinclair Radionics introduced their first radio with the "Sinclair Slimline" in kit form at forty-nine shillings and sixpence. A year later in 1964 Sinclair released the "Micro-6", match-box size radio which the company claimed was the "world's smallest radio". It could also be worn on your wrist with the "Transrista". In 1965 the "Micro-FM" debuted as "the world"s first pocket-size FM tuner-receiver", but was unsuccessful due to technical difficulties. Despite problems, illegal clones were produced in the far-east. Sinclair's final 1960s radio kit was the 1967 "Micromatic", it was billed as "the world's smallest radio" like Sinclair's earlier radios. The "Micromatic" was a reasonable success and was sold until 1971. In May 1971 Sinclair Radionics made £85,000 profit on £563,000 turnover; the following year profit increased to £97,000 on turnover of £761,000.
In 1966 Sinclair Radionics entered the hi-fi market with the "Stereo 25", a low-cost pre-amp control system, production was halted in 1968 due to low supply of transistors which had been purchased in 1964 as rejects from other manufacturers. In 1969 it was replaced by the "Stereo Sixty", which soon became Sinclair's most successful audio product, being the second product of the "Project 60" range. The "Project 60" products sold well and were supplemented by the "Project 605" kit in 1972. It was eventually superseded by the more advanced "Project 80" kit in 1974. In September 1973 Sinclair purchased "Ablesdeal" so that he would be able to avoid the delay of incorporating a company if it became convenient for him to shift his ambitions away from Sinclair Radionics. In May 1973 Sinclair Radionics generated £1.8m turnover.
In 1966, Sinclair Radionics developed the world's first portable television, the "Microvision", but never attempted to sell it because development costs would have been too high based on the complicated design the Microvision used. In 1976 it was sold as a revised version, the "Microvision TV1A/MON1A" at £99.95. Supply exceeded demand, and 12,000 units were left unsold until they were sold off cheaply. This resulted in a £480,000 loss for Sinclair. Sir Clive Sinclair was certain that the TV1B model released in 1978 would be more successful, but sales were disappointing. The technology was sold to
Binatone .
During the majority of the 1970s Sinclair focused on building the most affordable pocket calculators, with the best design. In 1972, Sinclair released the world's first slim-line pocket calculator, the
Sinclair Executive , for £79.95. The calculator only included basic math functions, and the
LED display required lots of power. It is often credited as being the world's first attractively-styled calculator, that didn't require mains power to be used like prior calculators. The executive was a phenomenal success, earning Sinclair £1.8m in profit. In 1973 the "Executive Memory" was introduced at a far cheaper price of £24.95.
In 1975
Sinclair Radionics launched the £29.95
Oxford 300 scientific briefcase calculator. 1975 also saw the release of the
Sinclair Scientific , a scientific pocket calculator for £99.95. It used
RPN , and displays only in 5 digit mantissa or 2 digit. In 1977 a revised model, the "Scientific Programmable", was released at £29.95. The Scientific Programmable Mark 2 was later released, reducing the price to £17.22. Sinclair attempted to capture the top-end calculator market with the
Sinclair Sovereign , available in plated gold or silver, it was critically acclaimed for its excellent engineering and design and enjoyed short success.
In August of 1975 Sinclair introduced the
Black Watch at £17.95 in kit form and £24.95 ready-built. Including a 5-digit LED display, it suffered from technical flaws related with the battery and accuracy. The company began to see significant commercial losses because of the product. In August 1975, Sinclair changed the name of Ablesdeal to "Sinclair Instrument Ltd". Exactly a year later the
National Enterprise Board bought a 43% stake in Sinclair Radionics for £650,000. Finding it inconvenient to share control of his company, Sinclair encouraged
Chris Curry , who had been working for Radionics since 1966, to leave and get Sinclair Instrument started.
Sinclair Instrument developed the "Wrist Calculator" to generate cash, it soon became a commercial success selling in surprising figures. In July 1977 Sinclair Instrument Ltd was renamed to "Science of Cambridge Ltd". Around about the same time,
Ian Williamson showed Chris Curry a prototype computer based around a
National Semiconductor SC/MP and some parts taken from an earlier Sinclair calculator. Curry was impressed and encouraged Sinclair to adopt this as a product; an agreement was reached with Williamson but no contract was ever signed,
Nat Semi had offered to redesign the project so that it used only their components and they also offered to manufacture the boards.
In June 1978 Science of Cambridge launched a microcomputer kit, marketed as the
MK14 , based around the National SC/MP chip. By July 1978, a personal computer project was already underway. When Sinclair learnt that the
NewBrain could not be sold at below the sub-£100 price that he envisaged, his thoughts turned to the ZX80 instead. In May 1979
Jim Westwood started the
ZX80 project at Science of Cambridge, it was launched in February 1980 at £79.95 in kit form and £99.95 ready-built. In November Science of Cambridge was renamed to "Sinclair Computers Ltd".
ZX81]]
In March 1981 "Sinclair Computers" was renamed to "Sinclair Research Ltd" and the
Sinclair ZX81 was launched at £49.95 in kit form and £69.95 ready-built, by mail order. In February 1982
Timex obtained a license to manufacture and market Sinclair's computers in the
USA under the name
Timex Sinclair . In April the
ZX Spectrum was launched, priced at £125 for the 16 kB RAM version and £175 for the 48 kB version. In July Timex launched the
TS 1000 (a version of the ZX81) in the US. In March 1982 Sinclair made an £8.55m profit on turnover of £27.17m, including £383,000 government grants for flat screen.
In 1982 Clive Sinclair converted the
Barker & Wadsworth Mineral Water Bottling Factory at 25 Willis Road, Cambridge into the ''Sinclair Building'' to use it as the company's new headquarters. (It was sold to Cambridgeshire County Council in December 1985 due to Sinclair's immense debts and finance troubles.)
In January 1983 the ZX Spectrum personal computer was presented at the
Las Vegas Consumer Electronics Show. In September the Sinclair
TV80 Television was launched, using flat-screen technology unlike Sinclair's previous
CRT televisions, the TV80 was a commercial failure only selling 15,000 units and not covering its development costs of £4m.
In late 1983, Timex decided to pull out of the "Timex Sinclair" venture, which had failed to break the US market as expected due to strong competition. However Timex computers continued to be produced for several years in other countries. Timex Portugal, with the
TS 2048 and
2068 , launched improved versions capable of displaying more colours, and a better circuit design. They also developed and launched the FDD 3000, a floppy disk system, that was not well received by the market.
The '' noted that it was "difficult to find a good word for Sinclair Research in the computer press".
Fully working QLs were not available until late summer; complaints against Sinclair regarding delays were upheld by the
Advertising Standards Authority in May of the year (in 1982 it had upheld complaints about delays in shipping Spectrums). Especially severe were allegations that it was cashing cheques months before machines were shipped. The QL was nowhere near as successful as Sinclair's earlier computers. In the autumn, Sinclair were still publically predicting it would be a "million seller", with 250,000 sold by the end of the year
Your Spectrum Issue 7, September 1984 - Circe . QL production was suspended in February 1985, and the price was halved by the end of the year
zqaonline Timex/Sinclair history .
Between 1981 and 1988 Sinclair created ten peripherals for their computers, including
Joystick s, a
Printer ,
Hard Drive , and memory expansion modules. Some of the peripherals were developed by other companies but still marketed under the Sinclair brand. External storage for the Spectrum was usually on tapes, as was common in the era. Rather than an optional
Disk Drive , Sinclair instead opted to offer their own system, the
ZX Microdrive , a tape-loop cartridge system that was rather unreliable. This was the primary storage option for the QL as well.
The "ZX Spectrum+", a retooled ZX Spectrum with a plastic keyboard, was launched in October and appeared on
WHSmith 's shelves the day after release. Retailers stocked the machine in large numbers in expectation of good Christmas sales, however it did not sell in the numbers expected and, because retailers still had unsold stock, Sinclair's income from orders dipped alarmingly in January. The Spectrum+ had the same technical specifications as the original Spectrum. An upgraded Spectrum, the ZX Spectrum 128, was launched in
Spain in September 1985, by the Spanish firm
Investronica CRASH Issue 22 . January 1986 saw the machine launched in the UK, apparently in an attempt to generate cash
CRASH Issue 50 .
