HILPERT-TONSTUDIOTECHNIK TECHNICAL SUPPORT AEG 1 TELEFUNKEN - MAGNETOPHON HAMBURG FON : +FAX : +EMAIL: hilpert@hilpert-audio.de WEB : www.hilpert-audio.de
Magnetophon 21m1/,~ Professional Tape Recorder
For the two audio channels the track selection may be determined as you like: track 1 and 2 or track 1 and 3. Operation is possible with NAB hub lock for NAB reels up to 12 1/2 inch diameter. Since it is small and takes up little space the M21 is particularly suitable for installation in 19" racks and carrying cases and can of course be fitted into existing consoles. Installed in the Vario stand it is even possible to adjust height and angle for Operation in a sitting or standing position. The recorder operates in any Position between the horizontal and vertical. Additional informations are available in our brochure "magnetophon 21 ".
Purpose The M21-1/2" professional tape recorder (short for Magnetophon 21-1/2") is a modern, professional system which is designed for ease of operation through the utilization of the most sophisticated technology currently available. lt is designed for top quality master recording and reproduction in radio and television studios as well as in the recording industry and Professio nal studios in general. The M21-1/2" tape recorder was developed from the proved M21 standard professional machine and it serves the purpose of analog audio recording an 1/2 inch tape.
The microcomputer enables tape transport and amplifier operation to be programmed, thus greatly increasing the system's range of applications. The machine is available in stereo, two-track or two-out of four-track recording for A-wind (oxide coating inside). Two speeds may be selected and switched over an the front panel from the four speeds available. At a tape speed of 15/30 ips the stereo version is prefered to the production of disk mastering or at a tape speed of 7.5/15 ips the two-out-offour-track version is prefered to the production of cassette mastering.

Fig. 1

Magnetophon 21-112" as a table model - A-wind shown

Fig. 2

Magnetophon 21-112" : Head assembly of highest precision

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Fig. 3 Practical microprocessor supported operating and indicating comfort

magnetophon

Operating Panel
Push-button function Fastwind Record Playback Stop

Push-button designation

RECORD

UNLDAD

Unloading tape from heads Rewind at search speed Setting the tape timerto 0 Editing Tape speed/equalization switch-over Setting of Cue Search to Cue Search to Zero f

SPEED EU

SET CUE

LDC CUE

LOC D i
Loop operation Variable tape speed Mono Stereo (track 1 and 2) Track 1 Track 2 Input to Output Function enabling Button : tape speed/equalization switch-over, vari-speed mono, stereo, track 1, track 2, input

REPEAT

VARI SPEED

sTEREo

ENABLE

Tape speeds

3-motortape transport 1 electronically controlled, brushless crystal oscillator reference dc motor for direct capstan drive 2 electronically controlled dc reel motors 3.75 / 7.5 / 15/30 ips (all machines so equipped) 2 speeds may be selected an the front panel from the 4 speeds available all tape speeds are continuously adjustable with a range of 10 max. 0.2 peakweighted (DIN 45507, IEC. Publ. 368, ANSI) measured using EMT 420 at30 and 15 ips max. 0.04% at7.5ips max. 0.06% at 3.75 ips max. 0.1 max. 0.1 12.7 mm (112 inch)
Varispeed Deviation of average speed from nominal speed Wow and flutter

Tape slip Tape width

Hubdiameter Tape coating Applicable hubs and reels Starting time at 15 ips and 101 /2" spool (2500 ft tape) Fast wind time Stopping time out of fast wind with full 101 /2" spool (2500 ft tape) Spooling tape tension Electronic tape timer Tape time error Timer overshoot after tape end run-off Tape transport and amplifier control Mode selection indication Remote control interface

max. 12112" -_ 3960 ft (1200 m) standard tape-_ 5940 ft (1800 m) long playtape inside (A-wind) NAB reels, 41 /2" (114 mm) core diameter (with adapter) to attainment of 0,1 wow and flutter : 0.7 sec max. 80 sec for 2500 ft (760 m) tape with spool (variable wind speed) stop max. 5 sec end of tape max. 6 sec
1 N (3.6 ozs force) 5-digit LCD indicator in hours, minutes and seconds for all tape speeds, with negative sign below zero max. 0.3 max. 1 sec microcomputerwith 8085 microprocessor alpha-numeric,16-digit LCD rewind,fast forward,record, playback, stop, fader contact, enable fader contact, 1 reserve software-defined serial interface (optional) 17.5 ps (prop. AES) or 35 ps (old DIN) 35 ps (CCIR) or 50 + 3180 ps (NAB) 70 ps (CCIR) or 50 + 3180 ps (NAB) 90 + 3180 ps (NAB) or 50 + 3180 ps (NAB-EE)
Equalization at 30 ips at 15 ips at 7.5 ips at 3.75 ips (all equalizations combined switchable) 2 speed/equalization combinations are selectable at the operating panel Input
Input level Input impedance
electronically balanced (differential input circuit) (optional floating with input transformer) +6 dBm (nominal value) or adjustable from 0 dBm to +12 dBm (max. 24 dBm) min. 10 kn between 20 Hz and 20 kHz (min. 5 ki2 between 30 Hz and 16 kHz with input transformer)
electronically balanced (differential output circuit) (optional floating with output transformer) +6 dBm (nominal value), adjustable to +12 dBm (at 510 nWb/m), max. output level +24 dBm max. between 20 Hz and 20 kHz (max. 40 i) between 30 Hz and 16 kHz with output transformer) min. load impedance : 1504 up to +18 dBm 2000 up to +24 dBm 205 kHz with crystal reference Hz Hz Hz Hz Hz Hz Hz Hz. 20. 18. 20.18.16. 14.10. 8 kHz kHz kHz kHz kHz kHz kHz kHz 1 1.5 dB dB.5d13 dB.5d13 dB.5d13 dB
Output level Output impedance
Overall characteristics (These data refer to modern tapes such as 3M 226, Ampex 456, BASF LGR 50, Agfa PEM 468 or equivalent)
Erase/bias frequency Frequency response at 30 ips: at 15 ips: at 7.5 ips : at 3.75 ips Signal-to-noise ratio RMS, A-weighted according to DIN 45633 (IEC Publ.179) referred to 1020 nWb/m and NAB equalization Stereo Two-track Four-track (any 2 channels out of 4 tracks) Quasi-peak, weighted according to CCIR 468 referred to CC IR equalization) Stereo (510 nWb/m) Two-track (510 nWb/m) Four-track (200 nWb/m) (any 2 channels out of 4 tracks) Total harmonic distortion

7.5 71

3.75 70

ips dB dB dB

3.75 -
ips dB dB dB max. 0.6 max. 0.4
stereo and two-track (referred to 510 nWb/m) Four-track (referred to 200 nWb/m)
Crosstalk rejection measured at 1 kHz in accordance with DIN 45521
Erase attenuation AC mains
min. 65 dB stereo version : two-trackversion : min. 65dB two-out-of-fourtrack version : min. 60 dB - adjacent channels : min. 70 dB - unadjacent channels : min. 85 dB at 1 kHz (510 nWb/m) 100, 110, 120, 200, 220 or 240 V (+5%/-10%) (by changing solder connections) 50 or 60 Hz 160 VA max. 250 VA
Power consumption at nominal voltage
Ambient temperature Operating positions Dimensions, weights Chassis Carrying case (approx.) Console 700 Vario stand (max. dimensions)
+5C to +45C cold start (-5C) ready for operation after 5 minutes any horizontal to vertical Depth Weight kg Height Width 45 277+525 (11 "+2") (19") (20.6") (100 Ibs) (262,5*) 14.(16") (20.1 ") (23.6") (33 Ibs) (36.2"2) (28.7") (23.6") (92.4lbs) (52") (26") (31.5") (70.4 Ibs) Max. height at mounting in 19" rack. When installed in console 700 the upper edge height is the same as that of M15A.
AEG's offering also includes a wide range of units and systems for the electronic media, such as: Video editing systems for magnetic picture recording and video control recording - independent from the tage formats and machines' manufacturers, remote control of studio equipment and systems, remote control units for studio cameras, electronic programmable colour correction transmitting and aerial systems units, for all transmission frequencies, and so on. These systems are future-oriented, because they are future-outlined. Please contact us.
We are easy to reach. One of our representatives is certainly in your vicinity, too. Please contact the representatives abroad or our central address below. One of them will respond at once.

Distributor:

AEG Aktiengesellschaft Professional Tape Recorder Branch Postfach 2154 D-7750 Konstanz Phone (West Germany) 7531-86-2370 Telefax (West Germany) 7531-86-2421 Telex 733 233