Like-CETOP-hone was originally the name for some phonographs developed by AEG. Because of the large admittingness of these devices like-CETOP-hone frequently also used as synonym for clay/tone on design devices of other manufacturers.
Fritz Pfleumer developed 1928 an apparatus, with which he could play before the "phonetic transcription carriers" invented by him during presentations. After Pfleumer and the AEG had met 1932 an utilization agreement for the tape, the AEG assigned engineer Eduard the development of seriesable playing equipment for the volumes. Because had substantial difficulties to prevent a tearing of the tape when the pre and rewinding AEG shifted the development into the AEG research laboratory in Berlin, under the direction of Theodor people, who already had experiences with a similar problem with There one developed the so-called three-engine drive at short notice in co-operation with BASF.
The three-engine drive had one a driving motor for the rendition and two engines, for each coil, for the pre and rewinding. Thus the problem was solved.
1935 led AEG and BASF the new equipment together under the designation like-CETOP-hone K1 during the 12. German radio exhibition for the first time publicly forwards. The interest, in particular with the realm broadcasting corporation, was large. On the third day a broken off fire destroyed not only the exhibition hall, but also all five (after other sources 4) at this time existing prototypes.
Originally one had assumed at AEG the actual use of the Magnetophons would lie in the recording of dictations. With the recording of a concert of the Londoner Philharmonics under the direction of Sir Thomas Beecham in the year 1936 in Ludwigshafen new areas of application showed up. Broadcasting corporations, which had used so far wax disks for the sound recording, were interested in the new technology and used them increasingly.
Those like-CETOP-hone was after end of war with the allied soldiers desired pieces of booty. Also the US industry was interested in outside of of Germany unknown technology and copied it, since in the USA up to this time still magnetized wire had been used for the sound recording.
Since 1958 like-CETOP-hone eingetragendes a registered trade mark for tape recorders of the enterprise is Telefunken.
1935 presented the first industrially manufactured tape recorder of the world to AEG on the radio exhibition in Berlin. During the fire of an exhibition hall all 5 (or 4) prototypes were destroyed. In the factory however still sufficient individual parts were present, in order to be able to make a further copy. The used tape was 6,5mm broad; the tape operation speed amounted to 1 m/sek; the equipment could note frequencies up to 6,000 cycles per second. The play time of a volume did not amount to approx. 20 Minuten.Obwohl like-CETOP-hone to K1 in the clay/tone quality advantages opposite the shellac plate offered, represented the smaller weight like-CETOP-hone a clear progress for application.
1936
1936 placed AEG like-CETOP-hone K3 forwards. The "K3" was world-wide one the first mobilely applicable tape recorder. In the scope of supply were contained a coal microphone, an amplifier and a loudspeaker. The entire plant weighed approx. 50 kg.
1938 developed like-CETOP-hone to K4, which found fast spreading with the Rundfunkstudios, there the tape opposite the wax plates used so far clear advantages with handling, storage and clay/tone quality offered. The tape operation speed amounted to 77 cm/sec. with a reel length of 1,000 meters arose thereby 22 minutes recording time.
1943 used like-CETOP-hone K7 for the first time the 1940 by walter weber and invented high frequency bias, which reduced the volume noise substantially.
1951 placed first for private users to AEG developed tape recorder of the liking CETOP hone series on the industrial show in Berlin forwards. The tape operation speed amounted to 19 cm/sec. the equipment weighed approx. 20kg.
1958
That approx. 1955/1956 published like-CETOP-hone 65KL was luggage equipment in the plastic housing, with half trace technology and a frequency range from 60 to 10,000 cycles per second at a tape operation speed of 9,5 cm/sec. The "KL65" had a recording and a read head and equipment could with coils to 13cm diameter be equipped, the Spieldauer amounted to when using 260m Langspielband 2 x 45 minute dimensions: 308 x 125 x 234 mm, weight 7.2 kg.
That approx. to 1956 published two-trace recording device like-CETOP-hone KL65KS rolling up plate drive was equipped of the Capstan by means of slide belts with an a engine drive assembly with asynchronous interior runner and flat strap-driven Capstanschwungscheibe as well as. The tape strain price increase was made by sensing lever brakes. Furthermore the equipment had one electromagnetically supports volume pressure. The tape operation speed could be changed over of 9,5 to 4,75 cm/sec. The frequency range was enough at 9,5 cm/sec. from 60 to 11,000 Hertz, with dynamics of 45dB. Flutter amounted to only approx. 0.3%. The maximum coil size amounted to 13 cm. "Start" and "stop" could be switched over a cable from the distance and in addition offered the equipment also controlloudspeaker-used tubes: EF 86 (microphone and rendition preliminary stage); ECC 83 (A/W ECC 81 (Gegentakt EL 95 (Niederfrequenz-Endstufe); EM 71a (magic eye to the recording level meter)
1959
1960 Studio equipment
1967
Beginning of the 1950er JahreDas AW stood for admission/rendition
1960
The equipment had three tape operation speeds: 4,75, 9.5 and 19.5 cm/sec.
2-Spur equipment with a tape operation speed of 9,5 cm/sec.; maximum coil size 18cm; Weight approx. 9,5kg
Viertelspur Stereo equipment with 3 volume speeds
In dimensions of approx. 31.5 x the equipment approx. 5 kg weighed 27 x 8 cm.
1/4 " - Studio equipment with 19 and 38 cm/sec. tape operation speed.
approx. 1975
Technical data:
Net: 110/220 V, 50 cycles per second convertible on 60 HzLeistungsaufnahme: Ready status: approx. 8 W, enterprise approx. 40 and electric rectifier: EF86, EF83, ECC83, EL95, EM84, 3 dry rectifier safety devices: 110" 127 V - 0,6A centralslowly-acting, 220" 240 V - 0.3 A central slow-acting binding speed: 9,5 cm/second reeling size: maximally 15 cmSpurlage: Two-trace after standard international standard: 3 hours with doubles match volume rewinding time: approx. 4 minutes with doubles match volume frequency extent: 40" 14000 HzEntzerrung: after NARTBDynamik: >= 48 <= Microphone 2 mVs at 470 kOhmRadio 2 mVs at 22 kOhmPhono 200 mVs at 2 MOhmWiedergabe exit: Radio approx. 1V at 18 kOhmEnd disconnection: by switch foil speedometer: with 3 digits with release key dimensions: Height of 16.5 cm, width 38 cm, depth 30 cmGewicht: approx. 10.5 kg
Source: Original operating instructions of the tape.
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