History of the manufacturer
Racal Engineering (Racal Instruments) Ltd., Bracknell
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| Name: | Racal Engineering (Racal Instruments) Ltd., Bracknell (GB) |
| Abbreviation: | racal |
| Summary: |
Racal Engineering / Racal Instruments Ltd., Bracknell, UK.
|
| Founded: | 1950 |
| Production: | 1951 - |
| History: |
Racal Ltd. wurde 1950 von Ray Brown und George Calder Cunningham, ehemaligen Plessey-Mitarbeitern gegründet. Der Firmenname leitet sich aus den Vornamen der Gründer ab: RAy - CALder. Mit dem kommerziellen Kurzwellenempfänger RA-17 führte Racal das Prinzip der "Wadley Loop" - einer speziellen, besonderes stabilen Regelschleife zur Oszillatorsteuerung (nach dessen Erfinder und damaligem Mitarbeiter, Dr. Trevor Lloyd Wadley, 1920 - 21.05.1981) - in den professionellen Empfängerbau ein.
Aus der Racal Engineering Ltd. wurde 1979 die Racal Communications Ltd., 1990 wurde sie mit dem Zweig der militärischen Kommunikationstechnologie in Racal Radio Ltd. übergeführt, 2000 in die Thomson-CSF Racal übernommen. Racal UK war die Muttergesellschaft von Vodafone.
Der US-amerikanische Zweig Racal Communications Inc. war 1965 - 1971 in Silver Spring und 1972 - 1997 in Rockville beheimatet.
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This manufacturer was suggested by Martin Bösch.
Some models:
| Country | Year | Name | 1st Tube | Notes |
|---|---|---|---|---|
| GB | 57–62 | RA-17L [Mk III] | 6F33 | Coverage 980 - 30000 kHz, AM/SSB with BFO, linear analog readout (ca. 1 kHz). First profe... |
| GB | 58 | SSB Radiotelephone TRA55 | The TRA55 is an early SSB transceiver rated at 60 watts output and operates on four crysta... | |
| GB | 58 | SSB Radiotelephone TRA55B | 12AT7 | 4 channel, crystal locked SSB transeiver. The TRA55B SSB transceiver is a later version... |
| GB | 54 | RA-17 | EF91 | General coverage receiver 980 - 30000 kHz, AM, SSB (BFO). IF bandwidths 0,1 / 0,3 / 0,75 ... |
| GB | 57 | RA-17 [Mk II] | EF91 | General coverage receiver 980 - 30000 kHz, AM, SSB (BFO). IF bandwidths 0,1 / 0,3 / 0,75 ... |
| GB | 57 | RA-17C-12 | 6AU6 | General coverage receiver 980 - 30000 kHz, AM, SSB (BFO). IF bandwidths 0,1 / 0,3 / 1,2 /... |
| GB | 58–62 | RA-117 | M8100 | Coverage 980 - 30000 kHz, AM/SSB with BFO, linear analog readout (ca. 1 kHz). Standard ban... |
| GB | 75 | Frequenzzähler 9917A | Flaches Tischgerät. Zwei Eingänge: Input A 40-560 MHz, Input B 10 Hz - 60 MHz. | |
| GB | 79–90 | RA 1792 | Receiving mode: AM, USB, LSB, ISb optional, CW, FM:Sensivity: [for (S+B)/B = 10 dB]: Frequ... | |
| GB | 67–69 | Twin Channel Receiver RA-153 | Coverage 980 - 30000 kHz, AM/SSB with BFO, linear analog readout (ca. 1 kHz). Bandwidths a... | |
| GB | 60 | Dual Channel Receiver RA-253 | Coverage 980 - 30000 kHz, AM/SSB with BFO, linear analog readout (ca. 1 kHz). Professiona... | |
| GB | 59 | RA-81 | Empfangsstation bestehend aus Empfänger RA-17 / RA-117 and Panorama Adaptor RA-66B. The... |
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