Aiwa SD-L30 cassette deck

Stereo Cassette Deck

High performance recording and playback in a tape deck less than 7,2 cm high

A full-fledged, full-performance stereo unit with every essential feature you'd expect to find in larger systems, the SD-L30 combines modern styling with an incredibly precise slot-in loading mechanism and reliable DC servo motor that makes you wonder why decks got so big and complicated in the first place.

Metal Compatibility

The ability to make recordings on high performance metal cassettes is no longer a luxury confined to high priced avantgarde models; Aiwa has modified the SD-L30's circuitry and boosted erasure power to ensure full compatibility with metal. Along with extended frequency response metal tapes will give such dynamic sound you'll want to use them for all your serious recording work. A tough long-wearing hard Permalloy record/playback head and dounble-gap ferrite erase head ensure trouble free performance from all tape formulations.

Optical Peak Display

Besides conserving space, responsive peak LEDs provide an additional measure of accuracy to take the guesswork out of record level adjustment. Signals are indicated separately for left and right channels in an easy-to-read 3-color sequence from -10 dB to +6 dB

Amazingly, the SD-L30 even has rear panel jacks to accommodate a pair of microphones for live stereo recordings

Plus features:

Dolby NR system

Full auto stop

Separate L/R record volume controls

Line/mic input selector

Digital tape counter

Head cleaning access window

 

Specifications

Wow and Flutter:  0,09% WRMS

Signal-to-Noise Ratio:  60 dB (Dolby On)

Frequency Response

LH Tape :  25 -14,000 Hz

CrO₂ Tape :  25 - 16,000 Hz

Metal Tape :  25 - 16,000 Hz

Input Sensitivity/Impedance

Line In :  50 mV/50 k Ω

Mic :  0,3 mV/200 Ω  - 10 k Ω

Output Level/Impedance

Line Out :  0,41 V/50 k Ω

Head

Rec/Playback :  Hard Permalloy head

Erase :  Hi-Bs double gap ferrite head

Motor:  DC servo motor

Power Requirements:  240 V 50/60 Hz

Dimensions (W x H x D):  210 x 72 x 229 mm

(8-5/16" x 2-7/8" x 9-1/16")

Weight:2,8 kg (6,2 lbs)

 

Aiwa ST-R30 tuner

AM/FM Stereo Tuner

An unpretentious tuner with some very impressive credentials, the R30 brings a new dimension in design and convenience to radio listening enjoyment.

Accurate Digital Display

Regardless of scale length, you're never quite sure where you're tuned with linear or rotary scales, because their graduations are usually too widely spaced to define tuning variations as close as 100 kHz (FM) or 1 kHz (AM). This alone is one big advantage of a property designed digital readout. For extra accuracy, the frequency counter IC in the R30's digital unit employs a quartz crystal which provides an unerring 6,4 MHz reference signal to ensure that tuning is held within a close ±25 kHz for FM or ±1,5 kHz for AM.

Superb Performance

For the best possible sensitivity and rejection of spurious signals, front end design employs a high stability cascade junction MOS FET. Moving on to the IF detector stage, outstanding 70 dB selectivity within 400 kHz is realized by use of ceramic filters specially chosen for the flattest possible group delay characteristics, which in turn has achieved low noise and distortion. Beautiful stereo separation (45 dB at 1 kHz) is maintained by means of a stable PLL IC in the MPX demodulator stage.

Other Features:
hi-bled circuit

5-LED signal strength indicator

FM stereo indicator

Antenna terminals for 75 oh and 300 Ω

FM muting/AFC combination switch

AM/FM indicator LED

Rack Handles included

 

Specifications

FM Section

Sensitivity

Mono : 1,9 µV (usable sensitivity)

Stereo :  43 µV (at S/N 50 dB)

Signal-to-Noise Ratio

Mono :  73 dB

Stereo :  70 dB

Total Harmonic Distortion

Mono :  0,1%

Stereo :  0,25%

Capture Ratio:  1,5 dB

Stereo Channel Separation:  45 dB (at 1 kHz)

Frequency Response:  30 - 15,000 Hz (+0,5 dB, -1,5 dB)

IF Rejection:  80 dB

AMSuppression Ratio: 55 dB

AM Section

Frequency Range:

MW :  525 kHz - 1,605 kHz

LW :  150 kHz - 285 kHz

Power Requirements:  240 V 50/60 Hz

Dimensions (W x H x D):  210 x 71 x 254,5 mm (8-5/16" x 2-13/16" x 9")

Weight:  2,1 kg (4,6 lbs)

 

Superscope CD-302A cassette deck

Stereo cassette tape deck, features:

Built-in Dolby Noise Reduction System - with internal/external switching that enables it to operate as an independent out board playback Dolby system. Unlike most other Dolbyized units, the CD-302A Deck can also deprocess Dolbyized material from FM broadcasts and other tape recorders.

Automatic Shut-Off - that disengages the cassette drive mechanism at end-of-tape in record and play modes.

 

 

Recording Peak Limiter - that monitors and holds the recording level below saturation to prevent distortion while maintaining a full dynamic range.

Tape Select Switch - for proper bias and equalization when using either standard or chromium dioxide tape.

Mechanical Locking Pause Control - that enables you to pause during playback or recording without disengaging controls

VU Meters, Function Indicators and Cassette Compartment - that are illuminated for easy viewing

3-Digit tape Counter - with a reset button.

Walnut-Grained cabinetry - and the professional styling you'd expect to find only in more expensive units.

 

Specifications

Tape Speed:  4,8 cm/sec. (1-7/8 ips)

Reel Size:  compact cassette

Recording System:  Quarter-Track Stereo

Rewind and Fast Forward Time:  85 sec. C-60 cassette

Frequency Response

Standard Tape :  40 - 10,000 Hz

Chromium Dioxide Tape :  40 - 14,000 Hz

Signal-to-Noise Ratio

Standard Tape :  48 dB

Chromium Dioxide Tape :  51 dB

Bias Frequency:  85 kHz

Type of Level Indication:  Two VU Meters

Head Configuration

1 half-Track Erase

1 Quarter-Track Record/Playback

Wow and Flutter:  0,2% at 4,8 cm/sec. (1-7/8 ips)

Type of Motor:  One DC Electrical Governor Controlled

Semiconductors:  30 Transistors; 21 Diodes; 2 FET's

Inputs Sensitivity/Impedance:

Two Auxiliary (one for each channel Plug type Phono):  60 mV/180 k Ω

Two Microphone (one for each channel, Plug type Mini):  -72db/ low impedance

Outputs Level/Impedance:

Two Line (one for each channel, Plug type Phono):  0,775 V (at 0 VU) / 6 k Ω

One Stereo Headphone (Plug type Phono):  44 mV/8 Ω

One DIN Connector (Rec/Play)

Input Sensitivity/Impedance :  12 mV/47 k Ω

Output Level/Impedance :  0,775 V (at 0 VU) / 6 k Ω

Power Requirements:  110/220/240 Volts AC 50/60 Hz

Power Consumption:  11 Watts

Dimensions (W x H x D):  318 x 83 x 225 mm (12-1/2" x 3-1/4" x 8-7/8")

Weight:  2,7 kg (6 lbs)

 

Sanyo RD-4300 cassette deck

Stereo Cassette Tape Deck

The perfect stereo cassette tape deck for audio perfectionists. This brand new Sanyo model contains Dolby Noise (Reduction) which almost completely eliminates annoying huma and hissing sounds that heretofore have been an unavoidable part of stereo cassette recording and playback. This advanced unit also has a tape select switch for nominal or high quality chrome tapes. Monitoring while recording is also possible and a cue control and full automatic shut off are built in. At the end of a recording a special memory counter returns the tape to the exact beginning of the freshy recorded material.

Other outstanding features include a pause button, output level control for lineout level, DIN connector and two large VU meters a panel that automatically rises up from the unit at the touch of a button. The Signal-to-Noise Ratio of model RD4300 with the Dolby switch on is 58 dB and the amazingly flat frequency response when a chrome tape is used is 20 to 18,000 Hz. An outstanding stereo tape deck for audio enthusiasts who refuse to settle for less than the best.

 

Features

Dolby noise Reduction

A simple comparison of sounds with the Dolby function switch on and then off clearly shows the value of this noise reduction circuit. Tape hissing and other irritating sounds and humming are almost totally suppressed.

Convenient cueing control, Auto Stop

Finding recorded sections of the tape during fast forward and rewind has been greatly facilitated with a built-in cueing device. There is also a full automatic shut off system that turns off the mechanism at the end of the tape during playback, recording, rewind or fast forward.

Tape select switch for ordinary and chrome tapes

This unit takes both chromium dioxide and ordinary cassette tapes. The wider frequency response of chrome tapes is rated at 20 to 18,000 Hz. A tape select switch is provided for differentiating between the two types.

Excellent sound characteristics

Wow and flutter of this model is 0,1% RMS, and the Signal-to-Noise Ratio when the Dolby switch is on is rated at 58 dB

Two large VU meters

For precision recording and playback two large VU meters are supplied. These meters are built into a special panel that tilts up automatically from the unit at the touch of a button.

Other

Other features include a pause button, separate record/play controls, two microphone inputs, a double eject system that allows you to check the amount of tape left without disturbing the playback or recording and a detachable plate for easy head-cleaning.

 

Specifications

Recording System:  AC bias, 1/4 track stereo

Erasing System:  AC erase

Tape:  Chromium dioxide tape or ordinary cassette tape

Tape Speed:  1-7/8 ips (4,75 cm/sec.)

Recording Time:  60 min. (double-track C-60 tape)

Fast Forward and Rewind Time:  70 sec.

Wow and Flutter:  0,1% RMS

Frequency Response:

Chrome Tape :  20 - 18,000 Hz

Ordinary Tape :  20 - 16,000 Hz

Signal-to-Noise Ratio

Dolby ON :  58 dB

Dolby OFF :  50 dB

Inputs Impedance

MIC :  20 k Ω

AUX :  500 k Ω

DIN :  10 k Ω

Output Impedance

Headphone :  10 k Ω

Line Out :  2 k Ω

DIN :  2 k Ω

Semiconductors:  30 Transistors (includes 2 x FET), 21 Diodes

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

Dimensions (W x H x D):  440 x 120 x 242 mm (17-1/2" x 4-3/4" x 9-1/2")

Weight:  5,7 kg (12,6 lbs)

 

Optonica ST-3535 tuner

Outstanding Features

Multipath Detector Circuit

The ST-3535 incorporates a meter and terminals for an oscilloscope to detect multipath distortion and a built-in circuit to monitor its composition. The degree of multipath distortion is indicated by the meter, by the sound volume or by the waveform on the oscilloscope. Therefore, the antenna direction is easily and accurately reset. The circuit also improves FM listening and assures optimum recording.

Built-in Air Check Calibrator

This is a unique device for accurate "FM Air Check". Just flip on the switch and a level signal equivalent to that of the FM signal is generated. Then all you have to do is set the recording level to 0 VU on the deck.

Monolithic ICs are employed, Inter-station noise is eliminated by the muting switch

A hi-blend switch to reduce noise during reception of weak FM stereo signal

Variable audio output level control

Signal strength meter - this meter responses in proportion to the degree of signal intensity, thereby rendering effortless tuning under any condition

Easy-to-read-and-tune FM linear dial with a frequency-linear type variable capacitor, 8-11/16" wide scale, large flywheel and smooth tuning mechanism

FM signal input attenuator reduces distortion due to high signal input levels for stable FM reception

The FM antenna is equipped with dual terminals for 300 ohms or 75 ohms

Composite signal output terminal is provided for future possible FM 4-channel broadcasting

 

Outstanding Performance

Dual-gate MOS FETs and FM front end equipped with 4-gang linear tuning capacitor

The FM front end consists of a 4-gang capacitor that employs a double-tuned RF amplifier stage and a mixing stage. Remarkable performance characteristics such as 2,5 µV IHF sensitivity. 80 dB spurious response rejection ratio and 85 dB IF rejection ratio are attained. These figures assure high sensitivity and stable reception.

IF stage designed for high selectivity and interference protection

To obtain both ultra-low distortion characteristics and high selectivity, a phase linear ceramic filter and differential IC circuit are employed to make the phase characteristics at the IF stage linear. The band pass characteristics is also greatly improved.

PLL MPX circuitry

The PLL (phase-Locked Loop) circuit replaces the conventional coils and associated components with ultra-reliable integrated circuitry. The PLL circuit automatically compensates for phase-shift, thus ensuring stable separation for long periods of use.

A sub-carrier trap with inductive M-type filter is employed

 

Specifications

FM Section

Frequency Range: 87,6 - 108 MHz

Antenna Input:  75 Ω  (unbalanced); 300 Ω  (balanced)

Sensitivity (IHF)

Mono :  2,5 µV (300 Ω  antenna terminal)

Image Rejection:  80 dB

IF Rejection:  85 dB

Spurious Response Rejection:  80 dB

AM Suppression:  43 dB (mod. 30% AM by 1 kHz and 100% FM by 400 Hz)

Capture ratio:  1,5 dB

Selectivity:  65 dB (±400 kHz, 65 kHz Dev.)

Signal-to-Noise Ratio

Mono :  65 dB (75 kHz  Dev. 1 kHz)

Total Harmonic Distortion

Mono :  0,4% (75 kHz  Dev. 1 kHz)

Stereo :  0,8% (75 kHz  Dev. 1 kHz)

Stereo Separation

34 dB :  1 kHz, 75 kHz Dev.

25 dB :  50 Hz - 10 kHz

Frequency Response:  45 Hz - 13 kHz (±1,5 dB)

AM Section

Frequency Range:  520 - 1620 kHz

Antenna:  Built-in ferrite loopstick antenna AM external antenna terminal

Sensitivity:  400 µV /m (IHF, ferrite antenna)

Selectivity:  25 dB (at 1,000 kHz)

Signal-to-Noise Ratio:  35 dB

Image Rejection:  55 dB (at 600 kHz)

Total Harmonic Distortion :  1,5%

Audio Section

FM Output

Fixed :  0,5 V (1 kHz, 75 kHz Dev.)

Variable :  0 - 1,0 V (1 kHz, 75 kHz Dev.)

A Output

Fixed :  0,15 V (30% Mod.)

Variable :  0 -0 ,3 V (30% Mod.)

Composit Signal Out Terminal:  Yes

General

Semiconductors:  2 MOS FETs; 5 ICs plus 1 aux IC; 10 Transistors plus 16 aux Transistors; 6 Diodes plus 15 aux Diodes

Power Requirements:  AC 120 50/60 Hz

Power Consumption:  24 W

Dimensions (W x H x D):  17-3/8" x 5-5/8" x 15"

Weight:  2 lbs