Tandberg 9100X reel-to-reel

 Tandberg 9100X Stereo

Features:

3 motors

Electronic controls with 14 integrated circuits (Ics)

Mixing in stereo

Balanced microphone inputs

3 speeds, 4 heads

Tandberg Crossfield recording technique

Facilities for echo, sound-on-sound, editing and A – and B-test of recording

Professional mechanics

Remote control facility

Front outlet for stereo headphones

Can be used with separate hi-fi stereo amplifier

Electronics

The control system in the 9100X is an electronic brain with 14 high level logic, integrated circuits (IC’s). electronics has replaced mechanics, and each control is carried out firmly and precisely by a light touch on the keyboard 9100X “thinks for itself”. The electronics and the tape-tensioning mechanism always ensure that the tape is transported correctly. Connected to a remote control system (an accessory) all logic functions can be controlled from a distance of 5 meters. 9100X has all the qualities that Tandberg tape recorder are renowned for; echo, recording with sound-on-sound, A- and B-test of programmes. The B-test is a particularly important feature because it facilities close control of recording quality. There are 4 input controls, 2 for microphone inputs and 2 for line input (radio with record player or another tape recorder), and sound sources in stereo or mono. The microphone inputs in 9100X are balanced. This means that unwanted electrical noise from e. g. vacuum cleaners or foodmixers does not affect the recording.

Tandberg Crossfield Recording Technique

This is a special recording technique found only in Tandberg tape recorders. With this technique the tape is magnetized right through and is therefore capable of receiving very strong signals and reproducing them as crystal clear sound without distortion. The Tandberg Crossfield recording technique provides a safety margin against overload, particularly in the highest tone register which is the most critical region when recording.

Peak Level  Meters

The level meters are in the professional class. They always shows the strongest part of the sound – exactly that part which becomes distorted if the magnetic tape is overloaded. With the Tandberg Crossfield recording technique and the peak level meters you can fully exploit a tape’s qualities.

Photo-electric Stop

The forward drive stops automatically at the end of the tape or if the tape is transparent

Monitoring During Fast Winding/Editing

This functions (Edit/Cue) facilities listening to the tape during fast winding or rewinding. Consequently it is easy to find your way on the tape and to edit the recordings

Professional Mechanics

Correct reproduction demands high accuracy in the design and construction of the tape path. Therefore the complete tape guidance system in the 9100X is mounted on a stable base plate which ensures that the tape is correctly guided passed the magnetic heads. There are 3 motors – 2 for winding in either direction and one for forward drive. The winding motors work also as mechanical breakes. Together with the closed loop and the magnetic controlled friction breakes they ensure gentle treatment of the tape.

Specification

9100X is adjusted for Tandberg Tape or equivalent tape of the LH-type.

The largest reel diameter is 7” (18 cm).

Tape Speed:  7-1/2; 3-3/4; 1-7/8 ips

Speed Tolerance:  0,7%

Speed Variation

7-1/2 ips : 0,06% (WRMS) 0,09% (Peak value DIN 45511)

3-3/4 ips : 0,11% (WRMS) 0,15% (Peak value DIN 45511)

1-7/8 ips : 0,21% (WRMS) 0,3% (Peak value DIN 45511)

Frequency Range (DIN 45511)

7-1/2 ips : 30 to 26,000 Hz

3-3/4 ips : 30 to 20,000 Hz

1-7/8 ips :  30 to 11,000 Hz

Amplifier Mode :  30 to 22,000 Hz ±2 dB

Signal-to-Noise-Ratio:  at ( at highest speed, measured with Tandberg Tape or equivalent LH-tape)

IEC A-curve, 3% Distortion:  65 dB (4-track); 67 dB (2-track)

IEC Linear RMS , 3% Distortion :  58 dB (4-track); 58 dB (2-track)

DIN 45511(Weighted):  60 dB (4-track); 62 dB (2-track)

DIN 45511 (Unweighted) :  56 dB (4-track); 56 dB (2-track)

Crosstalk Attenuation (at 1000 Hz):  Better than 60 dB (MONO); Better than 50 dB (STEREO)

Distortion maximum

From Recording Amplifier at 0 dB :  0,2 %

From Replay Amplifier :  0,2% at 1,5 V

From Tape at 0 dB Recording Level :  3% max.

Inputs (Each channel has the following inputs)

Radio Input :  Impedance 50 k Ω  / Sensitivity 8 mV to 1,2 V

Line Input :  Impedance 200 Ω  / Sensitivity 30 mV to 5 V

MIC :  Balanced inputs for dynamic microphone with impedance of 200 to 700 Ω  / Sensitivity 230 UV to 35 UV at 400 Hz and 200 ohm microphone impedance

Outputs (Each channel has the following outputs)

Radio Output :  Impedance 5 k Ω  / Voltage 0,75 V unloaded

Line Output :  Minimum Load Impedance 150 Ω  / Voltage 1,5 V unloaded

Headphones Output :  Minimum Load Impedance 8 Ω  / Power 5 mW

Equipped  with reel locks (for use in vertical position)

Delivered as 2-track or 4-track version

Wood – Teak or palisander (Oak or request)

Main Voltage:  240/230/115 V 50 Hz  (60 Hz on request)

Power Consumption:  96 watts

Dimensions (W x H x D):  400 x 180 x 410 mm (15-3/4” x 7-1/4” x 16-1/8”)

Weight:  15,5 kg (34,5 lbs)

Akai X-200D reel-to-reel

 Three motors Auto-reverse custom deck

Model X-200D - this smartly designed three motors, Auto-reverse custom deck offers you superb stereo hi-fi tape recording and automatic reverse playback.

Outstanding Features:

4-track stereo/monaural recording and playback. For playback, the X-200D requires an external power amplifier and speakers

3 speeds - 1-7/8; 3-3/4; and 7-1/2 ips

3 heads - Erase, Recording/Playback and bias heads. Cross-field head System

3 motors - A hysteresis synchronous 3-speed motor for capstan drive. Two 6-pole eddy current out-rotor motors for supply and take-up reel drive

Wide Cross-field frequency response

Solid state pre-amplifier with two integrated circuits

Sensing tape continuous reverse [Auto, reverse]

Manual revers

Shield type head for high Signal-to-Noise-Ratio:

Two lever system ensures dependable and durable operation

Track selector for simple selection between stereo and monaural

Slide-type record level controls

100 kHz biased for FM multiplex recording

Automatic stop/shut off, Instant stop control with start button

Automatic pinch wheel release

Tape speed equalizer

Tape lifter in fast forward and rewind operation

DIN jack with selector switch for High/Low input

Stereo headphone jack

4-digit index counter with reset button. Twin type VU meter with record indicator lamp

Fine oil-finished wooden cabinet

Universal voltage selector [from 100V to 240V. 50/60 Hz]

Cross-Field Head

On conventional recorders the signal and bias are applied to the same recording head. Therefore the frequencies recorded, especially the high frequency component of the recorded signal tend to be attenuated or erased by the effect of the bias field.

On the exclusive Akai Cross-Field Head which was developed by Akai for practical use the signal and bias heads are mounted in opposition with their centers slightly off. As the recorded signal is entirely unaffected by the prevailing effect of the bias field, the tape can be recorded over the entire frequency spectrum with maximum fidelity.

Sensing Tape Continuous Reverse

Automatic reverse with metallic sensing tape is used for playback only. Reverse operation will occur when metallic sensing tape on pre-recorded tape makes contact with the Sensing Pin. Put metallic sensing tape at the desired reverse point on shiny side of the pre-recorded tape and another metallic sensing tape at the desired reverse point on dull side of the pre-recorded tape. The X-200D will then give continuous playback in both directions between two points.

Manual Reverse

The X-200D may be manually reversed by pushing the Reverse Buttons.

Solid State Pre-Amplifier with Two Integrated Circuits

X-200D’s solid state pre-amplifier uses special two Integrated Circuits developed by Akai

Specifications

Tape Speeds :  1-7/8; 3-3/4 and 7-1/2 ips

Max. reel Size:  7” reel

Fast Forward and Rewind Time

75 seconds for 1,200 ft. tape at 50 Hz

60 seconds for 1,200 ft. tape at 60 Hz

Motors : 

Hysteresis synchronous 3-speed motor for capstan drive.

Two out-rotor motors for supply and take-up reel drive

Heads :  Record/Playback Head:  Erase and Bias heads

Wow and Flutter: 

7-1/2 ips :  less than 0,08% RMS

3-3/4 ips :  less than 0,12% RMS

1-7/8 ips : less than 0,20% RMS

Frequency Response:

7-1/2 ips :  30 – 20,000 Hz  ±3 dB 

3-3/4 ips :  30 – 19,000 Hz  ±3 dB 

1-7/8 ips :  30 – 9,000 Hz  ±3 dB 

Signal-to-Noise-Ratio: :  better than 50 dB 

Total harmonic Distortion: :  within 2% at 1,000 Hz  0 VU recording

Input Level

Mic :  better than 0,5 mV 

Line :  better than 50 mV 

DIN :  better than 5 mV  (Low), >50 mV  (High)

Output Level

Line :   VU (1,23 V)

DIN :  0,4 V

Equalization:  Correct equalization for playback of tapes recorded to the NAB curve

Recording Bias Frequency:  100 kHz 

Recording Level Indicator:  Twin type VU meter

Recording System:  4-track stereo/monaural Cross-Field bias system

Semiconductors:  14 Transistors ; 2 ICs ;

Power Supply:  AC 100 to 240 V, 50/60 Hz

Power Consumption:  8 - 90 VA

Dimensions (W x H x D):  358 x 358 x 227 mm (14” x 14” x 8-7/8”)

Weight:  17 kg (37,4 lbs)

Akai 1710W reel-to-reel

Akai 1710W Mignon Stereo Tape Recorder

Creating a delightful mood of stereo music around you

New compact style with oil-finished wooden cabinet complements your hi-fi set or other furniture

Rugged construction assures trouble-free operation

Tape cleaner keeps tape and heads free of dust and Oxide powder, and prevents annoying tape squeak.

Outstanding features

4-track stereo/monaural recording and playback

3 Speed, 1-7/8; 3-3/4 and 7-1/2 ips (15 ips optimal)

Shield type head for high s/n

Two lever system ensures dependable and durable operation

Track selector for simple selection between stereo and monaural

Automatic shut off

Instant stop control

Tape cleaner

Tone controls

Speaker switch

Tape lifter in fast forward and rewind operation

4 hours maximum stereo recording capacity with a 1,200 foot tape

Two built in 5” x 7” speakers

DIN jack, Stereo headphone jack

3-digit index counter with reset button, 2 VU meters

One piece front panel and fine oil-finished wooden cabinet

Vertical and horizontal operation

Universal voltage selector (from 100 V to 240 V, 50  or 60 Hz)

 

Specifications

Tape Speed :  1-7/8; 3-3/4 and 7-1/2 ips

Tape Speed Deviation:  within ±3% at all tape speeds

Fast Forward and Rewind Time

150 seconds for 1,200 ft. tape at 50 Hz

120 seconds for 1,200 ft. tape at 60 Hz

Monitor System:  Can be monitored the program being recorded by using a stereo headphone

Motor:  Condenser starting induction two-speed motor

Horse Power:  1/100 HP

Power Ratio:  70%

Revolution

2,900 to 1,450 rpm at 50 Hz

3,480 to 1,740 rpm at 60 Hz

Reels Used:  7” – 5” – 3” reels

Heads

 Rec/Play Head:  Inline 4-track stereo/monaural

Gap :  4/1000 mm

Impedance:  3,600 Ω  at 1,000 Hz

Erase Head:  Inline 4-track stereo

Gape:  0,1 mm

Impedance:  3,6000 Ω  at 90 kHz

 Record Level Indicator:  Vertical indication model “A” VU meter

Wow and Flutter: 

7-1/2 ips :  less than 0,18% RMS

3-3/4 ips :  less than 0,25% RMS

1-7/8 ips : less than 0,35% RMS

Frequency Response:

7-1/2 ips :  40 – 15,000 Hz  ±3 dB 

3-3/4 ips :  40 – 12,000 Hz  ±3 dB 

1-7/8 ips :  40 – 6,000 Hz  ±3 dB 

Signal-to-Noise-Ratio:   better than 50 dB 

Total harmonic Distortion:   within 3% at 1,000 Hz  0 VU recording

Crosstalk : 

Monaural :  less than -55 dB 

Stereo :  less than -43 dB 

Erase Ratio:  less than  -70 dB 

Insulation Resistance:  better than  50 M Ω 

Insulation Durability:  1,000 V, AC for more than one minute duration

Line Output:  2,5 V at volume maximum (250 Hz, 0 VU recorded tape used)

Impedance:  82 k Ω 

Main Output:  4 W at music power per each channel total 8 W

Impedance:  8 Ω  

DIN Output:  2,5 V at Volume maximum

Impedance:  82 k Ω 

Line Input:  150 mV

Impedance: 130 k Ω 

Mic Input:  3 mV

Impedance:  30 k Ω 

DIN Input:  20 mV

Impedance:  36 k Ω 

Recording System:  In-line 4-track stereo, monaural recording

Playback System:  In-line 4-track stereo, monaural playback

Transitor Used:  2SC650 (x2); 2SC-458LG [C, D] (x2)

Tube Used:  12AT7 (x1); 6AR5 (x2); 6CA4 (x1)

Germanium Used:  IN-34A (x2)

Power Supply:  AC 100 to 240 V, 50/60 Hz

Power Consumption:  80 VA

Dimensions (W x H x D):  345 x 360 x 190 mm (13-1/2” x 14” x 7-1/2”)

Weight:  15 kg (33 lbs)

 

Toshiba PT-862 open reel deck

 

Stereo Tape Deck PT-862

Features:

3-head system permits either tape or source monitoring and echo recording

Mechanical automatic shut off and easy tape loading mechanism

Tape selector switch and recording bias control

Sound on sound system 4-digit tape counter

Playback volume

 

Specifications

Usable Tape:  Open reel tape , up to 7"

Tape Speed:  19 cm/sec. (7-1/2 ips); 9,5 cm/sec. (3-3/4 ips); 4,8 cm/sec. (1-7/8 ips)

Track and Channel:  4-track, 2-channel stereo record and playback

Bias and Erasure:  AC, 85 kHz

Input Jack:  Microphone, Line, DIN

Output Jack:  headphone, Line, DIN

Motor:  4-pole condenser motor

Output Level/Impedance:  0 - 1 V (Variable) / 500 Ω 

DIN :  0,5 V / 6,8 k Ω

Frequency Response:  50 - 20,000 Hz

Tape Speed Tolerance:  ±1%

Wow and Flutter:  0,09% WRMS

Crosstalk:  60 dB

Channel Separation:  55 dB

Signal-to-Noise Ratio:  56 dB

Erasure:  65 dB

Input level/Impedance:

Mic :  -65 dB / 10 k Ω

Line-in :  -23 dB / 820 k Ω

FF Time:  180 sec. (7" 100% tape)

Rewind Time:  180 sec. (7" 100% tape)

Controls:  Tape selector switch, speed change, power switch, volume control, mode selector

Operations: Rotary (Play, Stop, F.F., REW.); Pause

Auxiliary Devices:  4-digit tape counter, easy loading mechanism, recording bias control

Power Source: AC 100/110/120/200/220/240 V, 50 or 60 Hz

Dimensions (W x H x D):  390 x 355 x 186 mm (15-5/16" x 12-1/4" x 7-3/8")

Weight:  12 kg (26 -7/16 lbs.)

Toshiba PT-866 open reel deck

Features:

3-head system permits either tape or source monitoring and echo recording

Mechanical automatic shut off and easy tape loading mechanism

Tape selector switch and recording bias control

Sound on sound system

4-digit tape counter

Playback volume

 

Specifications

Usable Tape:  Open reel tape , up to 7"

Tape Speed:  19 cm/sec. (7-1/2 ips); 9,5 cm/sec. (3-3/4 ips); 4,8 cm/sec. (1-7/8 ips)

Track and Channel:  4-track, 2-channel stereo record and playback

Bias and Erasure:  AC, 85 kHz

Input Jack:  Microphone, Line, DIN

Output Jack:  headphone, Line, DIN

Motor:  4-pole condenser motor

Output Level/Impedance:  0 - 1 V (Variable) / 500 Ω 

DIN :  0,5 V / 6,8 k Ω

Frequency Response:  50 - 20,000 Hz

Tape Speed Tolerance:  ±1%

Wow and Flutter:  0,09% WRMS

Crosstalk:  60 dB

Channel Separation:  55 dB

Signal-to-Noise Ratio:  56 dB

Erasure:  65 dB

Input level/Impedance:

Mic :  -65 dB / 10 k Ω

Line-in :  -23 dB / 820 k Ω

FF Time:  180 sec. (7" 100% tape)

Rewind Time:  180 sec. (7" 100% tape)

Controls:  Tape selector switch, speed change, power switch, volume control, mode selector

Operations: Rotary (Play, Stop, F.F., REW.); Pause

Auxiliary Devices:  4-digit tape counter, easy loading mechanism, recording bias control

Power Source: AC 100/110/120/200/220/240 V, 50 or 60 Hz

Dimensions (W x H x D):  400 x 440 x 222 mm (15" x 16-1/4" x 8-3/4")

Weight:  15 kg (33 lbs.)

 

Tandberg Series 6000X reel-to-reel

The new tape recorder Series 6000X is designed for the world's most discriminating markets, and is in a class by itself when it comes to quality, precision and sound reproduction. Tandberg Series 6000X Stereo has a modern design. The operational devices are clearly arranged and in spite of its numerous technicalities the tape recorder is simple and easy to operate.

Series 6000X Stereo is a fully transistorized stereo recorder with 3 speeds: 7-1/2, 3-3/4 and 1-7/8 ips. It is intended for use together with separate hi-fi amplifiers and has therefore no built-in power amplifiers. There are separate heads for recording, playback and erase, plus a bias head. Two moving coil meters indicate recording levels. These instruments also indicate the output level at playback.

The recording is based upon the Tandberg Cross-Field technique, giving sensationally good specifications for frequency range and Signal-to-Noise Ratio. Inputs for dynamic microphone, line, radio, magnetic and ceramic pick-up. Limiter prevents excessive input signal levels during recording. Listening during fast wind and rewind if desired, makes it easy to locate a programme on the tape.

Professional tape recorder users will appraise the merits of Series 6000X Stereo. Mixing possibilities in stereo with separate input controls (2 for each channel), microphone with pick-up, line or radio. 4 input controls for mixing in mono. AB-test,  - that is you can listen to a programme during recording (monitoring). And you can also listen to the playback during recording. Possibilities for "Sound-on-Sound" copying of a programme from one track to the other, and mixing in a new programme synchronously with the first one. Possibilities for echo and other trick recordings.

Tandberg 6000X Stereo has one-lever control of tape drive, push-buttons for electrical functions and track selection, illuminated 4-digit revolution counter, automatic end-stop, pause=button and possibilities for remote control of start and stop.

Tandberg Series 6000X Stereo is available in 2- or4-track versions, in teak or rosewood cabinets.

 

Crossfield Technique

The technique employed by Tandberg introduces a separate bias head which thoroughly magnetizes and reduces the recording zone on the tape as well as wavelength dependability losses in the record function. In turn, the need for equalization in the record amplifier as well as distortion in the ultimate recording is reduced. Consequently, Signal-to-Noise Ratio, Dynamic Range and Record Frequency Response are all vastly improved. The fact that Tandberg designs and manufactures its own heads further crystallizes the ultimate potential of each Tandberg recorder into an optimum range. Therefore, it becomes evident why Tandberg's position as the world 's leading producer of tape recorders remains unmatched in the world today.

 

Specifications:

Tape:  7" max reel size. Low Noise tape should be used for recording

Tape Speeds:  7-1/2, 3-3/4 and 1-7/8 ips

Speed Tolerance:  ±1%

Playing Time (1,200 ft tape)

7-1/2 ips : 2 x 32 min. [stereo]; 4 x 32 min. [mono]

3-3/4 ips : 2 x 64 min. [stereo]; 4 x 64 min. [mono]

1-7/8 ips : 2 x 128 min. [stereo]; 4 x 128 min. [mono]

Playing Time (1,800 ft tape)

7-1/2 ips : 2 x 48 min. [stereo]; 4 x 48 min. [mono]

3-3/4 ips : 2 x 96 min. [stereo]; 4 x 96 min. [mono]

1-7/8 ips : 2 x 192 min. [stereo]; 4 x 192 min. [mono]

Fast Wind and Rewind

1,200 ft Tape :  approx. 1-3/4 min.

1,800 ft Tape :  approx. 2-1/2 min.

Heads:  1 x Erase; 1 x Record; 1 x Playback; 1 x separate Cross-Field bias Head

Erase and Bias:  85,5 kHz, distortion less than 0,5%

Inputs Sensitivity/Impedance

MIC :  70 µV/ 200 - 700 Ω (Max. Input Level 70 mV)

Radio :  5 mV/100 k Ω (Max. Input Level 15 V)

Line :  5 mV/100 K Ω (Max. Input Level 15 V)

Pickup :  1 mV/33 K Ω  (Max. Input Level 3V. With pick-up selector in position C; Impedance adapted for ceramic pick-up. Sensitivity 10 mV. Max. Input Level 30 V)

Limiter: Attack time below 5 ms. Release time approx. 1 s

Outputs Load/Impedance

Radio :  0,75 V/ 11 K Ω 

Line :  160 mV/10 K Ω

Outputs : 1,5 V/200 Ω 

Headphones :  1,5 V/ 200 Ω

Distortion: 

0,5% (From record amplifier at 0 dB recording level)

0,3% (From playback amplifier at 1,5 V output voltage)

3% :  (From tape at 0 dB recording level)

Frequency Response

7-1/2 ips : 40 - 20,000 Hz ±2 dB

3-3/4 ips : 50 - 16,000 Hz ±2 dB

1-7/8 ips :  50 - 9,000 Hz ±2 dB

Measured according to DIN 45511

7-1/2 ips : 40 - 22,000 Hz

3-3/4 ips : 40 - 18,000 Hz

1-7/8 ips :  40 - 10,000 Hz

Wow:  Measured in % according to DIN 45511

7-1/2 ips : better than 0,1%

3-3/4 ips : better than 0,2%

1-7/8 ips :  better than 0,4%

Signal/Hum :  ( Unweighted) peak value measured in % according to DIN 45511 at tape speed 7-1/2 ips and 5% tape distortion

54 dB (4-track)

54 dB (2-track)

Signal-to-Noise Ratio (peak value according to DIN 45511 at tape speed 7-1/2 ips and 5% tape distortion)

56 dB (4-track)

58 dB (2-track)

Signal/Tape Noise: (measured unweighted RMS)

58 dB (4-track)

58 dB (2-track)

Signal/Tape Noise: (measured according to A-curve RMS)

64 dB (4-track)

66 dB (2-track)

Crosstalk: (at 1,000 Hz according to DIN 45511)

Mono:  better than 60 dB

Stereo:  better than 50 dB

Power Requirements:  115/230/240 V, 50/60 Hz

Power Consumption:  45 W

Dimensions (W x H x D):  15-1/2" x 6-1/2" x 12-3/8"

Weight:  21 lbs

 

Akai GX-210D reel-to-reel tape deck

Three Motor Automatic Reverse Stereo Tape Deck

GX-210D features 3-motor drive mechanism includes self-lubricating Hysteresis Synchronous Motor

To match the lasting performance of the GX Head, the GX-210D is equipped with Akai's unique self-lubricating capstan motor. The installation of two oil circulating mechanisms with cellulose fibres within the interior of the motor provides long lasting, trouble-free operation. Oil circulating speed is adjusted naturally according to motor revolutions and temperature, and because shaft rotation is always smooth and stable, various mechanical troubles resulting from oil circulation suspension do not occur. Further, these unique cellulose fibres also function as filters to keep the oil clean during the circulating process, adding to the motor's epoch-making longevity. Two highly efficient outer-rotor motors for supply and take-up reel drive assure consistent and smooth tape travel and ideal starting torque.

Other features

Automatic and Manual Reverse Playback

Akai's Exclusive Glass and X'tal Ferrite heads

Self-Lubricating Hysteresis Synchronous Capstan Drive Motor

Reel Drive Outer-Rotor Motors

Sturdy 2-Lever Control System

Instant Tape/Source Monitoring

Tape Selector for High Performance Low Noise Tape

Automatic Stop and pause Control

4-Digit Index Counter for Easy Indexing

Built-in Reel Retainers

 

Specifications

Track System:  4-track, 2-channel stereo system

Tape Speeds

7-1/2 ips (19 cm/sec) ±0,8%

3-3/4 ips (9,5 cm/sec) ±1%

Wow and Flutter

7-1/2 ips :  less than 0,08% (*0,12%) RMS

3-3/4 ips :  less than 0,12% (*0,25%) RMS

Total Wow and Flutter:  less than 0,18% RMS at 7-1/2 ips (Scotch #175 tape, 3,000 Hz recording and playback)

Frequency Response

S.R.T. Tape

7-1/2 ips :  30 to 25,000 Hz ±3 dB

3-3/4 ips :  40 to 20,000 Hz ±3 dB

Regular Tape

7-1/2 ips :  30 to 23,000 Hz ±3 dB

3-3/4 ips :  40 to 18,000 Hz ±3 dB

Total Harmonic Distortion:  less than 1,5%

Output Line :

1,228V (4 ±1 dB) at FWD mode, using a 250 Hz 0VU pre-recorded tape

1,228 V (4 ±1,5 dB) at REV mode, using a 250 Hz 0 VU pre-recording tape

Output DIN :  610 mV (-2 dB) using a 250 Hz 0 VU pre-recorded tape

Inputs

Mic :  better than 0,3 mV

Line :  better than 60 mV

DIN :  better than 5 mV (Low); 60 mV (High)

Recording/Playbackl Level: 1,228 V (4 ±1,5 dB ) at 7-1/2 ips 1,000 Hz 0 VU recording

Signal-to-Noise Ratio:  better than 50 dB (7-1/2 ips); better than 47 dB (3-3/4 ips)

Total Signal-to-Noise Ratio:  better than 47 dB at 7-1/2 ips

Crosstalk:  better than 45 dB

Erase Ratio:  better than 70 dB

Recording Bias Frequency:  102 kHz ±5%

Bias Leak:  less than -30 Vu

High Frequency Deviation

Between FED Channels :  within 3 dB

Between REV Channels :  within 4 dB

Between FWD-REV :  within 3,5 dB

Reversing Time :  2 to 3 seconds

Recording Capacity :  45 min. Stereo recording using a 1,800 ft tape at 7-1/2 ips

Fast Forward and Rewind Time:  110/90 sec. Using a 1,800 ft tape at 50/60 Hz

Motors

Capstan Motor :  2 speed Hysteresis Synchronous Motor

Type  :  HM2-16MC (winterized) 4-8 pole

Revolutions :  1,500/1,800 rpm at 50/60 Hz

Reel Motor :  Two 6-pole eddy current outer rotor motor

Type :  24XO-MR

Revolutions :  930/1,120 rpm at 50/60 Hz

Heads

Combo Recording/Erase Head

Type :  RE4-6 GX head

Gap :  3,5 to 5,5 micron (REC); 0,2 mm W Gap (Erase)

Impedance :  1,400 Ω  ±25% at 100 kHz (REC)

130 Ω  ±7% at 100 kHz (Erase)

DC Resistance :  5,5 Ω  (REC); 2,3 Ω  (Erase)

Playback Head

Type :  P4-202 GX Head

Gap :  1,2 to 2,2 micron

Impedance :  1,400 Ω  at 1,000 Hz

DC Resistance :  268 Ω

Semiconductors:  29 Transistors; 15 Diodes; 3 Zener Diodes

Power Requirements:  100 to 120 V, 220 to 240 V AC 50/60 Hz

Power Consumption:  100 W max

Dimensions (W x H x D):  368 x 371 x 227 mm (14,5" x 14,6" x 8,9")

Weight:  15,4 kg (33,9 lbs)

 

Akai 1730D-SS reel-to-reel

4-channel / 2-channel Stereo Tape Deck

An entirely new world of sound has been created by Akai's electronics engineers who have developed a new and sophisticated line of 4-channel surround stereo equipment. Included in this line are the exciting 1730D-SS 4-channel/2-channel Stereo Tape Deck and 1730-SS 4-Channel/2-Channel Stereo Tape recorder.

With either system, you're completely surrounded in sound with four speakers, left and right in front, and left and right in the rear. This system gives you a real "sense of presence", the feeling of being exactly in the middle of a live performance. Both models are designed to be used for not only 4-channel stereo but also 2-channel stereo as well.

The 1730D-SS is perfectly matched with Akai's exclusive AA-6100 amplifier. this amplifier has 80 W music power for dynamic 4-channel stereo sound and accommodates both 4-channel and 2-channel stereo operation.

 

Akai's dependable 2-lever system complements the high grade parts and robust construction of this rugged 4-channel/2-channel stereo model

It is regular practice to employ mechanical control in one-motor tape decks.  Akai has long since employed this 2-lever system in our one-motor decks. When compared to an ordinary 1-lever system, because the Play/Rec and F.Fwd/Rew Levers are independent, the movable range of the levers are shorter, and operation is lighter. Also, because the F. Fwd/Rew Lever is separate, mis-operation is minimized. Further, because of the mechanical structure of this control system, other parts are not unfavourably influenced and mechanism endurance is extended. Rectangular shaped Control Panel with proportionately balanced controls.

4-Head System

Durable 2-Lever Controls for Extra Dependability

Instant tape/Source Monitoring

Newly Designed Slanted Control Panel for Easy Operation

Front and Rear Channel Headphone jacks for Easy Monitoring or Private Headphone Listening

Automatic Stop and Shut-Off

4-Digit Index Counter

Built-in Reel Retainers

Pause Control

 

Specifications

Recording System:  In-line 4-track, 4-channel stereo and 4-track 2-channel stereo recording

Playback System:  In-line 4-track, 4-channel stereo and 4-Track, 2-channel stereo playback

Tape Speed:  3-3/4 and 7-1/2 ips

Speed Deviation:  within ±1,5% at all speeds

Reels:  7", 5"  reels can be used

Wow and Flutter:

7-1/2 ips :  less than 0,15% rms

3-3/4 ips :  less than 0,2% rms

Frequency Response

7-1/2 ips :  30 to 22,000 Hz ±3 dB

4-3/4 ips :  40 to 13,000 Hz ±3 dB

Signal-to-Noise Ratio:  better than 48 dB

Total Harmonic Distortion

Line Output :  within 2% at 1,000 Hz 0 VU recording

Main Output :  within 3% at 1,000 Hz 5W (8 Ω )

Crosstalk: less than -50 dn (track) -40 dB (channel)

Erase Ratio:  less than 70 dB

Insulation Resistance: better than 50 MΩ

Insulation Durability:  1,000 V AC for more than one minute duration

Line Output:  +4 dB ±1,5 dB (1,228 V), at 0 VU indication, 250 Hz 0 VU recorded Tape. Required load impedance more than 25 k Ω

DIN Output:  -6 dB ±1,5 dB when using a 250 Hz recorded tape. Required load impedance more than 50 k Ω

Line Input:  above 40 mV/ 330 k Ω

Mic. Input :  above 0,4 mV/30 k Ω

DIN Input :  above 20 mV/100 k Ω

Fast Forward and Rewind Time: 

90 sec. 1,200 ft. Tape at 50 Hz

70 sec. 1,200 ft. Tape at 60 Hz

Motor:  Hysteresis synchronous 2 speed motor

Horse Power :  1/100 HP

Power Ratio :  85%

Revolutions :  3,000 to 1,800 RPM (at 50 Hz); 3,600 to 1,800 RPM (at 60 Hz)

Condenser Capacity:  3 µF (at 50 Hz); 2 µF (at 60 Hz)

Heads

Recording:  In-line 4-track 4-channel stereo (4-track 2-channel stereo)

Impedance :  125 Ω  ±20% at 1,000 Hz

Gap :  4/1,000 mm

Playback :  In-line 4-track 4-channel stereo (4-track 2-channel stereo)

Impedance :  1,200 Ω  ±15% at 1,00 Hz

Gap :  2/1,000 mm

Erase head :  In-line 4-track 2-channel stereo

Impedance :  195 Ω  ±10% at 100 kHz

Erase Head :  In-line Full track

Impedance :  350 Ω  ±10% at 100 kHz

Power Supply:  100 to 240 V AC, 50/60 Hz

Power Consumption:  55 W

Dimensions (W x H x D):  420 x 450 x 240 mm (16,5" x 18" x 9,5")

Weight:  17 kg (37,5 lbs)

 

Akai GX-280D-SS tape deck

4-Head 3-Motor Automatic Reverse Surround Stereo Tape Deck

Akai's GX Head 4-Channel Surround Stereo system eliminates the inability to pick up and reproduce true concert hall sound. Every pitch of sound and reverberation effect is reproduced with all of the exciting "sense of presence" experienced when attending a live concert. Akai's surround stereo supplements conventional stereo's two front speakers with two additional rear speakers to front the "2-2 system". The listener is surrounded by two sets of speakers (left & right front and left & right rear). This arrangement does not mean, however, that simply adding two speakers to a 2-channel stereo system is all that is necessary for 4-channel stereo playback. Four separate recordings are made using four individual channels (four tracks in one direction) of the magnetic recording tape. This 4-channel stereo tape feeds into four pre and main amplifiers to activate a 4-speaker system. Thus, at playback time, sounds from separate channels are emitted from each speaker providing the listener with a feeling that he is listening to concert hall sound from the best seat in the auditorium. Model GX-280D-SS is a compatible 4-channel/2-channel stereo model. For 2-channel stereo operation, only the front channels are utilized. For exciting 4-channel surround stereo, a 4-channel stereo external amplifier or two 2-channel stereo amplifiers can be used to activate a 4-speaker system.

 

GX (Glass & Crystal Ferrite) Head

Akai has equipped this model with its new and amazing Glass & Crystal Ferrite Recording and Playback heads to bring you unequalled open reel high fidelity sound. With the Glass & Crystal Ferrite head, superbly wider frequencies with clear highs can be recorded in all their true fidelity with low noise tape. In other words, with the GX head, a high dynamic range and excellent Signal-to-Noise Ratio are achieved. The secret of this quality head is made of single crystal ferrite and is mounted and set in glass. The superior high range characteristics are contributable to thw structure of the head gap which focused the magnetic field into a sharp oblong radius. This focused field recording system minimizes high frequency loss, eliminating undue equalization and achieving a wider dynamic range.

 

Specifications

Track System:  4-track, 4/2-channel stereo/monaural system

Reel Capacity:  up to 7" reel

Tape Speed:  7-1/2 and 3-3/4 ips (±0,5%)

Wow and Flutter:

At 7-1/2 ips :  less than 0,10% RMS

At 3-3/4 ips :  less than 0,15% RMS

Frequency Response (using Low Noise Tape)

At 7-1/2 ips :  20 Hz to 25,000 Hz (±3 dB)

At 3-3/4 ips :  30 Hz to 20,000 Hz (±3 dB)

Frequency Response (using Regular Tape)

At 7-1/2 ips :  30 Hz to 23,000 Hz (±3 dB)

At 3-3/4 ips :  30 Hz to 19,000 Hz (±3 dB)

Distortion:  less than 0,8% (1,000 Hz, "0" VU)

Signal-to-Noise Ratio:  55 dB

Erase Ratio:  better than 70 dB

Bias Frequency:  110 kHz

Heads :  4 - GX recording and playback, full-track erase, 2-channel erase head

Motors:  3 - One Servo motor for direct capstan drive, two 6-pole outer-rotor motors for supply and take-up reel drive

Fast Forward and Rewind Time:  90 seconds using a 1200 ft tape at 60 Hz

Recording Capacity:

2-channel Stereo : 2 hrs (1,200 ft tape, 3-3/4 ips)

4-channel Stereo : 1 hr (1,200 ft tape, 3-3/4 ips)

Output Jacks

Line :  4x 1,23 V (0 VU)/10 k Ω ; Required load impedance more than 25 k Ω

Phone : 2x 40 mV/8 Ω

Input Jacks

Microphone :  4x 0,5 mV/10 k Ω

Line :  4x 0,1 V/150 k Ω

DIN Jack: 2x  0,4 V/60 mV (High) 10 mV (Low)

Semiconductors:  68 Silicon Transistors; 52 Diodes

Power Requirements:  100 V to 240 V 50/60 Hz

Power Consumption:  140 W

Dimensions (W x H x D):  435 x 505 x 250 mm (17,4" x 20,2" x 10")

Weight:  22,4 kg (49,5 lbs)

 

Akai GX-265D tape deck

Stereo Tape Deck

AC Servo Motor Direct Capstan Drive System

6 Head system Automatic and manual Reverse Recording and Playback

One each GX forward recording, GX reverse recording, GX forward playback, GX reverse playback, forward erase, and reverse erase head make up the superior GX Head reverse recording and Playback system of this model. The quality and special process of the GX Head materials result in a wider dynamic range, better high frequency characteristics and tone quality and longer lasting performance. Manual Reverse Button and Automatic Sensing Tape Reverse completely eliminate the necessity of inverting reels by hand.

 

Symmetrical Head Block Layout for identical performance in both directions.

The arrangement of the head block is completely symmetrical in relation to the center capstan. The short and equi-distant tape path within the head block and between heads and reel tables on both sides assure identical performance in both directions. Tension Arms on both the take-up and supply reel sides provide perfect tape tension, also contributing to operating stability.

AC Servo Motor for capstan drive, Wow and Flutter reduced to 0,06.

The GX-265D employs a 3 motor drive system with a new AC Servo Motor for direct capstan drive, Rubber belts, flywheels, etc. are eliminated for reduced interference. This coupled with the center capstan system of this model reduces wow and flutter to an amazing 0,06%.

 

Microphone/Line Mixing

Individual Microphone and Line Input Level Controls and a built-in mic-line mixing circuit facilitate easy sound mixing from two separate sources.

Quick Pause Control

Depress the pause Switch to immediately suspend reel movement. When Pause mode is effected, the pinch wheel separates from the capstan by only 0,5 mm for a quick and smooth start when released. Especially convenient for editing tape.

Dual Monitoring

Tape/Source Monitor Switch enables comparison of source signals with just records signals for more professional recording results.

Automatic Stop

The Tension Arm/Stop lever drops at the end of the tape, activating an automatic stop mechanism which completely stops reel movement for operating safety.

Individual Track Selectors for Monaural or Stereo Preformance

Recording mode can be effected using individual left or right channel selectors or both channels simultaneously. A Recording indicator Lamp lights to confirm recording mode.

Output Level Control Enables Connection with any Amplifier

An Output Level Control facilitates adjustment of output level to correspond with your amplifier input.

Tape Selector Switch

A Tape Selector Switch facilitates the use of Low Noise or Wide Range tape. While high performance low noise tape is standard for this machine, the ability to use wide range tape further extends high range frequency response.

Feather Touch Controls for Smooth and Easy Mode Selection

VU Meter Scales Extended to +5 VU for Precise level Indication.

 

Specifications

Track System:  4-track, 2-channel stereo/monaural system

Reel Capacity:  up to 7" reel

Tape Speed:  7-1/2 and 3-3/4 ips (±0,7%)

Wow and Flutter:

At 7-1/2 ips :  less than 0,06% RMS

At 3-3/4 ips :  less than 0,09% RMS

Frequency Response (using Akai LN-150-7 Tape)

At 7-1/2 ips :  30 Hz to 25,000 Hz (±3 dB)

At 3-3/4 ips :  30 Hz to 19,000 Hz (±3 dB)

Distortion:  less than 0,5% (1,000 Hz, "0" VU)

Signal-to-Noise Ratio better than56 dB (measured via tape with peak recording level of +6 VU)

Erase Ratio:  better than 70 dB

Bias Frequency:  100 kHz

Heads :  6 - One each GX forward recording, GX reverse recording, GX forward playback, GX reverse playback, forward erase, and reverse erase head

Motors:  3 - One AC Servo motor for capstan drive, two eddy current motors for reel drive

Fast Forward and Rewind Time:  90 seconds using a 1200 ft tape at 60 Hz

Output Jacks

Line :  2x 0,775 V (0 VU) Required load impedance more than 20 k Ω

Phone : 1x 30 mV/8 Ω

Input Jacks

Microphone :  2x 0,25 mV/5 k Ω

Line :  2x 70 mV/150 k Ω

DIN Jack:  0,5 V/3 mV

Semiconductors:  38 Transistors; 26 Diodes

Power Requirements:  100 V to 240 V 50/60 Hz

Power Consumption:  80 W

Dimensions (W x H x D):  441 x 404 x 207 mm (7,4" x 15,9" x 8,2")

Weight:  16,6 kg (36,5 lbs)