659:
599:
687:
391:
133:
45:
417:
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 It was eventually superseded by the more advanced "Project 80" kit in 1974.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 May 1973 Sinclair Radionics generated £1.8 million turnover. The last Sinclair Radionics hi-fi product was the System 4000, in 1974.
86:
745:. In September the NEB renamed what was left of Radionics (i.e. the scientific instrument business) as Sinclair Electronics Ltd.; in January 1980 this was changed to Thandar Electronics Ltd. In 1989, Thandar Electronics Ltd merged with Thurlby Electronics Ltd, forming Thurlby Thandar Instruments Ltd. This company now does business under the name Aim and Thurlby Thandar Instruments (Aim-TTi).
255:
610:, which was considerably smaller than its competitors' by the use of hearing-aid-sized batteries. What had made this possible was it had been discovered that there was considerable latency in the display and memory and that, with the addition of a timer, power could be withheld from these battery-draining components for much of the time, thus greatly extending battery life.
673:
at £17.95 in kit form and £24.95 ready-built, although this wasn't available to buy until
January 1976. Including a five-digit LED display, it suffered from technical flaws related to the design of the case, the chip, the battery and accuracy. Not only was the watch unreliable, Radionics was not able
412:
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", billed as "the world's smallest radio"
420:
Another
Sinclair Radionics product that was introduced in 1964 and failed was the first class D amplifier kit rated at 10 watt RMS: a class D switching amplifier that was good in theory but sadly ahead of its time and available technology. The amplifier used low-frequency germanium transistors as
649:
In 1974, Radionics launched the DM1 digital multimeter. Such scientific instruments were to form a quiet backbone of
Radionics business for the rest of its existence. In marked contrast to the rest of the Sinclair range, the instruments gained a reputation for reliable conventionality rather than
416:
In 1966, Sinclair
Radionics re-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". This
421:
pulse width modulators and switches and wrongly relied on the loudspeaker's inductance to filter the class D signal into audio. Most often this would short out the output transistors. When it did work the power level was far below 10 watts and
Sinclair's main advertising channel,
674:
to fulfil the orders it had taken. As a result, Radionics made its first loss in the financial year April 1974 – April 1975. The Black Watch fiasco had a devastating effect on
Sinclair's finances, and the company would have gone bankrupt had not the Government, through the
621:
display required much power. It is often credited as being the world's first attractively styled calculator that did not require mains power to be used like prior calculators. The
Executive was a phenomenal success, earning Sinclair £1.8m in profit. In 1973 the slightly larger
714:
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.
634:
was launched in 1975. It was a scientific pocket calculator for the very competitive price of £49.95. 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.
646:, available in plated gold or silver. The calculator was critically acclaimed for its excellent engineering and design and enjoyed short success. Final attempts at the mass-market for calculators, the Sinclair Enterprise and the President, did not sell well.
381:
magazine, and borrowing £50, Clive Sinclair founded Sinclair Radionics Ltd. on 25 July 1961. Sinclair initially worked alone in the evenings in a room in London (he was still a technical journalist during the day), selling radio kits by mail order.
413:
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.
694:
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.
984:"...introduced a 3 1/2 digit multimeter based on a LSI chip and continues to make audio equipment". "Sinclair Radionics has only 250 employee and expects to make about $ 17 million for its fiscal year ending in March ".
759:
When it became clear that Radionics was failing, Clive Sinclair took steps to ensure that he would be able to continue to pursue his commercial goals: in February 1975, he changed the name of Ablesdeal Ltd. (an
613:
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
398:
Radionics initially developed hi-fi equipment; it released its first product, the Sinclair Micro-amplifier, in December 1962. The assembly and distribution of this product were contracted out to
409:. In the same year, Sinclair released the "Micro-6", matchbox-size radio, which the company claimed was the "world's smallest radio"—it could also be worn on your wrist with the "Transrista".
849:
737:
In May 1979, the NEB announced that it intended to sell Radionics' calculator and TV interests; they were bought by the ESL Bristol group (as Radionic Products Ltd.) and
107:
1159:
1102:
1154:
402:. In 1963 Sinclair Radionics introduced their first radio with the "Sinclair Slimline" in kit form at forty-nine shillings and sixpence (£2.47½).
782:" to generate cash, which soon became a commercial success selling in surprising figures. In July 1977 Sinclair Instrument Ltd was renamed to
875:
1144:
907:
94:
703:
1139:
1164:
711:
197:
169:
706:
agreed to provide £1 million for a revived portable TV project, which was finally launched in January 1977 as the Microvision
430:
Sinclair Radionics launched the System 2000 amplifier, FM tuner and loudspeaker in 1968. followed by the System 3000 in 1972.
1149:
17:
176:
150:
58:
764:
company he bought in September 1973, for just such an eventuality) to Westminster Mail Order Ltd.; this was changed to
234:
216:
72:
183:
427:
magazine, was so deluged with complaints that it supposedly refused to take further advertisements from Sinclair.
772:
165:
154:
1095:
1134:
771:
Finding it inconvenient to share control after the NEB became involved in Radionics, Sinclair encouraged
630:. A cheaper Executive was also launched shortly after. In addition to expanding the Cambridge range, the
775:, who had been working for Radionics since 1966, to leave and get Sinclair Instrument up and running.
779:
724:
699:
675:
642:
of briefcase calculators. Sinclair also attempted to capture the top-end calculator market with the
783:
667:
334:
828:
765:
143:
99:
64:
882:
190:
791:
1018:
922:
805:
399:
948:
727:
increased its stake in Radionics to 73%. By June 1978 Sinclair Radionics was working on the
618:
405:
A year later, in 1964, Sinclair released the "X-10" amplifier, one of the first commercial
8:
639:
631:
330:
1090:
995:
1045:
850:
Sinclair Radionics advertisement in December 1962 issue of Practical Wireless magazine.
643:
623:
614:
326:
290:
1026:
956:
930:
901:
761:
754:
406:
31:
742:
1106:
728:
627:
265:
861:
369:
which developed hi-fi products, radios, calculators and scientific instruments.
1121:(successor to Thandar Electronics Ltd and Thurlby Thandar Instruments Limited).
800:
and some parts taken from an earlier Sinclair calculator. This was sold as the
797:
423:
358:
345:
312:
824:
1128:
1030:
960:
934:
787:
731:
670:
786:. Around about the same time Ian Williamson showed Chris Curry a prototype
316:
702:
bought a 43% stake in Sinclair Radionics for £650,000, and in October the
617:, for £79.95. The calculator only included basic maths functions, and the
30:
Not to be confused with the later company also founded by Clive Sinclair,
275:
949:"What does it take to build the world's smallest scientific calculator?"
1067:
686:
658:
598:
390:
362:
132:
738:
377:
After raising funds to start the business by writing articles for
606:
In 1972, Radionics launched its first electronic calculator, the
366:
85:
748:
794:
741:
respectively. In July Clive Sinclair resigned with a £10,000
734:
project, which was later taken over by Newbury Laboratories.
707:
279:
974:
Arnold, William (9 January 1975). "Sinclair keep it lean".
801:
254:
1118:
804:
microcomputer kit. Science of Cambridge ultimately became
941:
439:
Financial performance of Sinclair Radionics, 1971—1978
955:. Vol. 143, no. 1. January 1975. p. 5.
1010:
967:
914:
157:. Unsourced material may be challenged and removed.
1016:
626:was introduced at a far cheaper price of £29.95 +
301:Renamed Sinclair Electronics Ltd. (September 1979)
433:
1126:
1037:
749:Sinclair Instrument and Science of Cambridge
1160:Manufacturing companies established in 1961
817:
73:Learn how and when to remove these messages
1025:. Vol. 144, no. 6. p. 125.
987:
862:"Planet Sinclair: Audio: Amplifiers: X-10"
253:
1155:Electronics companies established in 1961
929:. Vol. 205, no. 5. p. 44.
704:National Research and Development Council
638:In 1975, Sinclair Radionics launched the
235:Learn how and when to remove this message
217:Learn how and when to remove this message
1098:Clive Sinclair and the Pocket Calculator
685:
666:In August 1975, Sinclair introduced the
657:
597:
389:
110:of all important aspects of the article.
681:
14:
1127:
973:
906:: CS1 maint: archived copy as title (
106:Please consider expanding the lead to
920:
831:from the original on 21 December 2021
1017:Sinclair Radionics (December 1975).
993:
394:The Sinclair Micromatic pocket radio
155:adding citations to reliable sources
126:
79:
38:
1119:Aim and Thurlby Thandar Instruments
778:Sinclair Instrument developed the "
385:
24:
1145:Manufacturing companies of England
982:(1). New York: McGraw Hill: 76–77.
25:
1176:
1112:
602:The Sinclair Executive calculator
54:This article has multiple issues.
1043:
994:Owen, Chris (13 November 1985).
131:
84:
43:
1140:Electronic calculator companies
1060:
650:often unreliable idiosyncrasy.
142:needs additional citations for
98:may be too short to adequately
62:or discuss these issues on the
1165:1961 establishments in England
921:Scott, David (November 1974).
868:
854:
843:
653:
434:Calculators and test equipment
108:provide an accessible overview
13:
1:
1091:Sinclair: A Corporate History
1084:
357:was a company founded by Sir
1150:Companies based in Cambridge
678:, stepped in to support it.
7:
10:
1181:
752:
372:
29:
27:Former Electronics Company
718:
700:National Enterprise Board
690:Sinclair MTV-1 television
676:National Enterprise Board
340:
322:
305:
297:
286:
271:
261:
252:
1105:3 September 2013 at the
811:
784:Science of Cambridge Ltd
662:The Sinclair Black Watch
766:Sinclair Instrument Ltd
792:National Semiconductor
691:
663:
603:
395:
355:Sinclair Radionics Ltd
248:Sinclair Radionics Ltd
1019:"The Black Watch Kit"
806:Sinclair Research Ltd
689:
661:
601:
400:Cambridge Consultants
393:
682:Portable televisions
166:"Sinclair Radionics"
151:improve this article
18:Sinclair Electronics
698:In April 1976, the
632:Sinclair Scientific
440:
331:Sinclair Scientific
249:
1135:Sinclair Radionics
825:"The Pace Setters"
768:. in August 1975.
723:In July 1977, the
692:
664:
644:Sinclair Sovereign
624:Sinclair Cambridge
615:Sinclair Executive
604:
438:
407:Class-D amplifiers
396:
379:Practical Wireless
327:Sinclair Executive
291:Cambridge, England
247:
1048:. Planet Sinclair
1046:"The Black Watch"
1023:Popular Mechanics
998:. Planet Sinclair
953:Popular Mechanics
888:on 8 October 2016
755:Sinclair Research
596:
595:
352:
351:
245:
244:
237:
227:
226:
219:
201:
125:
124:
77:
32:Sinclair Research
16:(Redirected from
1172:
1079:
1078:
1076:
1074:
1064:
1058:
1057:
1055:
1053:
1041:
1035:
1034:
1014:
1008:
1007:
1005:
1003:
991:
985:
983:
971:
965:
964:
945:
939:
938:
918:
912:
911:
905:
897:
895:
893:
887:
881:. Archived from
880:
872:
866:
865:
858:
852:
847:
841:
840:
838:
836:
821:
780:Wrist Calculator
743:golden handshake
441:
437:
386:Radios and Hi-Fi
257:
250:
246:
240:
233:
222:
215:
211:
208:
202:
200:
159:
135:
127:
120:
117:
111:
88:
80:
69:
47:
46:
39:
21:
1180:
1179:
1175:
1174:
1173:
1171:
1170:
1169:
1125:
1124:
1115:
1107:Wayback Machine
1087:
1082:
1072:
1070:
1068:"About Aim-TTi"
1066:
1065:
1061:
1051:
1049:
1042:
1038:
1015:
1011:
1001:
999:
992:
988:
972:
968:
947:
946:
942:
927:Popular Science
919:
915:
899:
898:
891:
889:
885:
878:
876:"Archived copy"
874:
873:
869:
860:
859:
855:
848:
844:
834:
832:
823:
822:
818:
814:
790:based around a
757:
751:
721:
684:
656:
436:
388:
375:
308:
266:Limited company
241:
230:
229:
228:
223:
212:
206:
203:
160:
158:
148:
136:
121:
115:
112:
105:
93:This article's
89:
48:
44:
35:
28:
23:
22:
15:
12:
11:
5:
1178:
1168:
1167:
1162:
1157:
1152:
1147:
1142:
1137:
1123:
1122:
1114:
1113:External links
1111:
1110:
1109:
1093:
1086:
1083:
1081:
1080:
1059:
1036:
1009:
986:
966:
940:
923:"Peanut hi-fi"
913:
867:
853:
842:
815:
813:
810:
798:microprocessor
753:Main article:
750:
747:
720:
717:
683:
680:
655:
652:
594:
593:
590:
587:
584:
581:
577:
576:
573:
570:
567:
564:
560:
559:
556:
553:
550:
547:
543:
542:
539:
536:
533:
530:
526:
525:
522:
519:
516:
513:
509:
508:
505:
502:
499:
496:
492:
491:
488:
485:
482:
479:
475:
474:
471:
468:
465:
462:
458:
457:
454:
451:
448:
445:
435:
432:
424:Wireless World
387:
384:
374:
371:
359:Clive Sinclair
350:
349:
342:
338:
337:
324:
320:
319:
313:Clive Sinclair
309:
306:
303:
302:
299:
295:
294:
288:
284:
283:
273:
269:
268:
263:
259:
258:
243:
242:
225:
224:
139:
137:
130:
123:
122:
102:the key points
92:
90:
83:
78:
52:
51:
49:
42:
26:
9:
6:
4:
3:
2:
1177:
1166:
1163:
1161:
1158:
1156:
1153:
1151:
1148:
1146:
1143:
1141:
1138:
1136:
1133:
1132:
1130:
1120:
1117:
1116:
1108:
1104:
1101:
1099:
1094:
1092:
1089:
1088:
1069:
1063:
1047:
1044:Owen, Chris.
1040:
1032:
1028:
1024:
1020:
1013:
997:
996:"Multimeters"
990:
981:
977:
970:
962:
958:
954:
950:
944:
936:
932:
928:
924:
917:
909:
903:
884:
877:
871:
863:
857:
851:
846:
830:
826:
820:
816:
809:
807:
803:
799:
796:
793:
789:
788:microcomputer
785:
781:
776:
774:
769:
767:
763:
762:off-the-shelf
756:
746:
744:
740:
735:
733:
732:microcomputer
730:
726:
716:
713:
709:
705:
701:
696:
688:
679:
677:
672:
671:digital watch
669:
660:
651:
647:
645:
641:
636:
633:
629:
625:
620:
616:
611:
609:
600:
591:
588:
585:
582:
579:
578:
574:
571:
568:
565:
562:
561:
557:
554:
551:
548:
545:
544:
540:
537:
534:
531:
528:
527:
523:
520:
517:
514:
511:
510:
506:
503:
500:
497:
494:
493:
489:
486:
483:
480:
477:
476:
472:
469:
466:
463:
460:
459:
455:
452:
449:
446:
443:
442:
431:
428:
426:
425:
418:
414:
410:
408:
403:
401:
392:
383:
380:
370:
368:
364:
360:
356:
347:
344:£6.3 million
343:
339:
336:
332:
328:
325:
321:
318:
314:
310:
304:
300:
296:
292:
289:
285:
281:
277:
274:
270:
267:
264:
260:
256:
251:
239:
236:
221:
218:
210:
199:
196:
192:
189:
185:
182:
178:
175:
171:
168: –
167:
163:
162:Find sources:
156:
152:
146:
145:
140:This article
138:
134:
129:
128:
119:
109:
103:
101:
96:
91:
87:
82:
81:
76:
74:
67:
66:
61:
60:
55:
50:
41:
40:
37:
33:
19:
1097:
1096:Nigel Tout.
1071:. Retrieved
1062:
1050:. Retrieved
1039:
1022:
1012:
1000:. Retrieved
989:
979:
975:
969:
952:
943:
926:
916:
892:22 September
890:. Retrieved
883:the original
870:
856:
845:
835:20 September
833:. Retrieved
819:
777:
770:
758:
736:
722:
697:
693:
665:
648:
640:Oxford range
637:
612:
607:
605:
429:
422:
419:
415:
411:
404:
397:
378:
376:
354:
353:
317:Nigel Searle
262:Company type
231:
213:
204:
194:
187:
180:
173:
161:
149:Please help
144:verification
141:
116:October 2012
113:
97:
95:lead section
70:
63:
57:
56:Please help
53:
36:
976:Electronics
773:Chris Curry
668:Black Watch
654:Black Watch
335:Black Watch
315:, Founder,
276:Electronics
1129:Categories
1085:References
1052:19 October
1002:19 October
589:1,980,000
583:6,390,000
549:5,600,000
532:6,300,000
515:4,000,000
498:1,800,000
307:Key people
207:April 2009
177:newspapers
59:improve it
1031:0032-4558
961:0032-4558
935:0161-7370
608:Executive
447:Turnover
363:Cambridge
282:equipment
100:summarize
65:talk page
1103:Archived
902:cite web
829:Archived
739:Binatone
729:NewBrain
572:820,000
555:355,000
518:240,000
481:761,000
323:Products
272:Industry
1100:, 2003.
1073:10 June
827:. BBC.
535:45,000
484:97,000
450:Profit
373:History
367:England
341:Revenue
287:Founded
191:scholar
1029:
959:
933:
719:Demise
348:(1975)
293:(1961)
193:
186:
179:
172:
164:
886:(PDF)
879:(PDF)
812:Notes
795:SC/MP
712:MON1A
580:1978
563:1977
546:1976
529:1975
512:1974
495:1973
478:1972
461:1971
453:Loss
444:Year
280:hi-fi
198:JSTOR
184:books
1075:2021
1054:2009
1027:ISSN
1004:2009
957:ISSN
931:ISSN
908:link
894:2016
837:2015
802:MK14
710:and
708:TV1A
592:N/A
575:N/A
558:N/A
490:13%
311:Sir
298:Fate
170:news
725:NEB
628:VAT
619:LED
541:1%
524:6%
361:in
346:GBP
153:by
1131::
1021:.
980:48
978:.
951:.
925:.
904:}}
900:{{
808:.
586:?
569:?
566:?
552:?
538:−
521:−
507:?
504:−
501:?
487:−
473:?
470:?
467:?
464:?
456:%
365:,
333:,
329:,
278:,
68:.
1077:.
1056:.
1033:.
1006:.
963:.
937:.
910:)
896:.
864:.
839:.
238:)
232:(
220:)
214:(
209:)
205:(
195:·
188:·
181:·
174:·
147:.
118:)
114:(
104:.
75:)
71:(
34:.
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
