Sony ST-JX500 tuner

Sony ST-JX500

Direct Comparator AM/FM Tuner

Sony's Top-OF-Line Quartz Frequency Synthesis tuner

Features:

Quartz frequency synthesis tuning

Direct comparator circuitry

Ten station memory presets

Multiprocess memory

Memory Scan tuning

Auto Sweep tuning

Key Selling Feature - Direct Comparator

The new digital sources are creating the possibility for superior broadcasts and the need for superior tuners. For this reason, the Sony ST-JX500 was designed to incredibly high standards. Key to the tuner's high performance is Sony's unique Direct Comparator. Conventional quartz frequency synthesis designs compare the local oscillator frequency with a reference frequency found in the audible range. This produces audible range background noise. Sony's Direct Comparator design accepts the local oscillator frequency directly. this permits the comparator frequency to be raised above the audible range - producing a starting reduction in noise.

Key Demonstration

Check that your FM reception is adequate. Demonstrate the tuner, talking the consumer through the benefits of Direct Comparator. Then make sure to demonstrate a few of the convenience features. Show how Auto Sweep takes a sample of all the available stations to indicate every station that can be received. Then, press Memory Scan (you've set all the station presets already), and let it scan through the presets, providing the customer with a four second sample of each one.

Convenience Features

Microprocessor tuning with manual "step" and automatic tuning up and down

Ten station memory presets with random assignment if AM and FM stations

Four station programming permits recording four different stations in a programmed sequence with an accessory timer

Multi-process memory stores the frequency, mono/stereo mode, and muting condition of each preset station

Memory Scan provides a four second sample of each preset station

Auto Sweep provides a four second sample of each station on the dial

Preset station indicator cards to show memorized stations

Fluorescent multi-function display indicates received frequency, muting mode, FM or AM reception, tuning mode

Five-bar, FL signal-strength indicator for optimum antenna positioning

Technology Features

Quartz frequency synthesis; the most accurate, most convenient tuning system known

Sony's exclusive Direct Comparator provides exceptionally quiet FM reception

Extraordinary FM s/n of 90 dB in mono , 84 dB in stereo

Front-end Sensitivity equal to a 4-gang variable capacitor, 6 element filter and high reception ability by Antibirdy Filter

Built-in lithium battery maintains preset station memory

75 Ohm coaxial input connector provided

Specifications

FM Tuner Section

Useable Sensitivity (Mono):  10,3 dBf (1,8 µV )

50 dB Quieting Sensitivity

Mono: 16,1 dBf (3,5 µV )

Stereo :  38,9 dBf (43 µV )

Signal-to-Noise-Ratio: 

Mono :  90 dB

Stereo :  84 dB

Total harmonic Distortion:  at 1 kHz

Mono :  0,08%

Stereo :  0,1%

Intermodulation Distortion

Mono :  0,08%

Stereo :  0,1%

Frequency Response:  30 Hz - 15,000 Hz +0,5 dB -2,0 dB

Stereo Separation:  50 dB at 1 kHz

Alternate Channel Selectivity (400 Hz):  80 dB

Capture Ratio:  1,0 dB

AM Suppression:  60 dB

Image Rejection:  80 dB

Spurious Response:  100 dB

IF Response:  90 dB

RF Intermodulation (IHF):  74 dB

Muting/Tuning Threshold:  25 dBf

AM Tuner Section

Quieting Sensitivity:  

Built-in Antenna :  200 µV/m

External Antenna :  100 µV 

Signal-to-Noise-Ratio:  55 dB at 50 mV.m

Total harmonic Distortion:  0,3% at 50 mV/m, 400 Hz

Selectivity (10 kHz):  38 dB

Image Rejection:  42 dB

General

Output Level:  750 mV

Output Impedance:  4,7 k Ω 

Power Requirements:  AC 120 Volts, 50 Hz

Power Consumption:  11 Watts

Dimensions (W x H x D):  430 x 55 x 300 mm (17" x 2-1/4" x 11-7/8")

Weight (net):  3,1 kg (6 lb 14 oz)

 

Sony ST-JX310 tuner

Sony ST-JX310

Quartz Synthesis AM/FM Tuner

Sony's Lowest-Price Quartz Synthesis Tuner

Quartz frequency synthesis

5 AM/ 5 FM memory presets

Microprocessor-controlled tuning

Interstation muting switch

Key Selling Feature - Quartz frequency Synthesis

Of all the tuning systems available today, none is more convenient, none more precise, none offers greater freedom from drift and distortion than the system used in the ST-JX310 - Quartz frequency synthesis. Radio stations use a quartz crystal to maintain their location on the dial. in the same way, the ST-JX310 uses quartz to tune stations in with the utmost precision. it's easy, straightforward, and accurate every time.

Key Demonstration

Explain that the tuner uses a microprocessor to synthesize each station frequency, and uses quartz precision to lock onto that frequency. There is no drift or fade, Demonstrate operation by asking the customer for his or her favourite station. Tune the station manually, then enter it into one of the tuner's memory presets. Tune in another station, then retrieve the station just preset. Point out that, once memorized, any station can be recalled at any time with a touch of a button.

Convenience Features

Microprocessor tuning with manual "step" tuning up and down the dial

Five AM and five FM station memory presets for instant recail at the touch of a button

Liquid crystal display includes preset number, station frequency, tuned status, muting status

Switchable muting between FM stations eliminates raucous inter-station noise.

Stereo indicator

Technology Features

Quartz frequency synthesis for the most precise , most convenient tuning available at any price

Superior FM s/n of 82 dB in mono, 77 dB in stereo

Lithium batteries maintain preset station memory

Detachable AM ferrite bar antenna can be located for optimum reception

specifications

FM Station

Useable Sensitivity (Mono):  10,3 dBf (1,8 µV )

50 dB Quieting Sensitivity

Mono: 16,1 dBf (3,5 µV )

Stereo :  38,3 dBf (45 µV )

Signal-to-Noise-Ratio: 

Mono :  82 dB

Stereo :  77 dB

Total harmonic Distortion: at 1 kHz

Mono :  0,15%

Stereo :  0,3%

Frequency Response:  30 Hz - 15,000 Hz +0,5 dB -2,0 dB

Stereo Separation:  45 dB at 1 kHz

Alternate Channel Selectivity (400 Hz):  65 dB

Capture Ratio:  1,0 dB

AM Suppression:  54 dB

Image Rejection:  50 dB

Spurious Response:  70 dB

IF Response:  90 dB

RF Intermodulation (IHF):  60 dB

Muting/Tuning Threshold:  25 dBf

AM Section

Quieting Sensitivity:  Detachable antenna :  50 µV/m

Signal-to-Noise-Ratio:  54 dB at 50 mV/m

Total harmonic Distortion:  0,3% at 50 mV/m, 400 Hz

Selectivity (10 kHz):  38 dB

Image Rejection:  45 dB

General

Output Level:  550 mV

Output Impedance:  3,3 k Ω 

Power Requirements:  AC 120 Volts, 50 Hz

Power Consumption:  8 Watts

Dimensions (W x H x D):  430 x 55 x 285 mm (17" x 2-1/4" x 11-1/8")

Weight (net):  2,8 kg (6 lb 3 oz)

 

JVC VN-700 amplifier

JVC VN-700

140 Watt Integrated Amplifier with 5-Zone S.E.A. 

Despite its greater number of controls than other amplifiers in its class, the VN-700's front panel is not at all bulky and has a modern and pleasing aesthetic; the knobs and switches are rationally arranged, and the volume control is easily identifiable due to its size and position. The controls for the input selector, listening mode, and monitor inputs are very convenient, but the knobs for the multiple

tone control (<• SEA») are a bit too small. Its potentiometers operate in steps

to more easily set the boost or cut level. The subsonic filter is truly effective, quickly cutting the response curve below 18 Hz. The ability to engage the "SEA" equalizer even while recording and to output recordings in both directions is very useful.

The rear panel features two PHONO inputs (one of which has adjustable sensitivity and impedance), two TAPE inputs, and three auxiliary inputs, one

also with adjustable sensitivity. Essential for a system upgrade from stereo to quadraphonic are the duplicated outputs of the preamplifier section and connections for a quadraphonic decoder. The sockets are all jacks, with the addition of two DIN connectors that duplicate the tape inputs.

There are four Hitachi power transistors. The final stage is fully complementary symmetry with a power supply symmetrical with respect to ground and therefore without an output capacitor.Cooling is provided by a traditional

metal radiator. A relay disconnects the speaker connection.

The VN-700's internal layout is very tidy. At the top center is the printed circuit board for the "SEA," the long-throw input switch mounted near the rear panel, both for space reasons and to reduce the length of the wiring, which compromises the device's signal-to-noise ratio. All the connecting cables pass under the chassis' motherboard and are bundled. The construction is typical of Japanese amplifiers. The mounting brackets on which the circuit boards are mounted vertically are visible. This is an ideal solution for calibration or repairs.

Specifications

Type:  Solid State Stereo Integrated Amplifier

Semiconductors:  32 Transistors; 14 Diodes;

Inputs: Phono 1 & 2;Aux 1, 2 & 3; Tape-Play 1 & 2; Main IN; 4-Channel Rear In

Outputs: Tape Rec 1 & 2; 2 x Pre-Out; 4-channel Rear Out; Speakers System 1 & 2; Headphones

DIN Socket:  Tape 1, Tape 2

Front Panel Controls: Phono 1 Cartridge Load select & Level adjust

Power Amplifier Section

IHF Dynamic Power:  

110 W (55 + 55 W) at 8 ohm load

140 W (70 + 70 W) at 4 ohm load

Continuous Power RMS

80 W (40 W + 40 W) at 8 ohm load one channel driven

100 W (50 W  + 50 W) at 4 ohm load one channel driven

70 W (35 W + 35 W) at 8 ohm load both channel driven

80 W (40 W + 405 W) at 4 ohm load both channel driven

Power Bandwidth

10 Hz - 23 kHz (8 ohm load one channel criven, output power) 35 W THD 0,25%

25 Hz - 20 kHz (8 ohm load both channel driven, output power) 35 W THD 0,25%

THD 0,05% at rated power (1 kHz)

Intermodulation Distortion: 0,4% at rated power 0,1% at 1 W

fr 3 Hz - 450 kHz (-3 dB) at 1 W

Damping Factor:  50 Hz at 8 ohm load

Matching Load Impedance:  4 - 16 ohm

Input Sensitivity for Rated Power:  1 V

Preamplifier Section

FR 20 Hz - 50 kHz +_0,5 dB

S.E.A. Controls

Center Frequency :  40; 250; 1,000; 5,000; 15,000 Hz

Control Range:  =-12 dB

Input Sensitivity For Rated Power:  

Phono :  2,5 mV

Aux :  200 mV

Tape Playback :  200 mV

s/n Ratio

Phono :  55 dB

Aux :  82 dB

Equalizer:  RIAA (Mag) =-0,5 dB

Phono Overload:  240 mV (p-p) at 1 kHz; 170 mV RMS

Recording Out Level

PIN Jack :  30 mV

DIN Jack :  180 mV

Filters

Subsonic :  18 Hz 12 dB/oct

High :  9 kHz -12 dB/oct

Muting:  -20 dB

Power requirement:  110, 120, 220, 240 V 50/60 Hz

Power Consumption:  150 W

Dimensions whd 16-5/8" x 5-3/8" x 12-1/2"

Weight:  22 lbs

JVC VT-700 tuner

 JVC VT-700 Solid State FM/AM Tuner

Ultra-sensitive FM section

signal strength and center-of-channel tuning meters

Fixed level and variable outputs

High blend and muting controls

Discrete 4-channal FM ready by FM DET Out jack

Specifications 

Type: FM/AM Stereo tuner

Semiconductors:  24 Transistors; 27 Diodes; 1 FET; 2 ICs ; 4 Ceramic Filter (8 elements)

FM Tuner Section

Frequency Range:  88 - 108 MHz

IF Amplifier Stage:  4 Transistors and 2 ICs

sensitivity:  1,7 µV  (IHF)

Signal-to-Noise-Ratio: better than 65 dB

Capture Ratio:  less than 0,8 dB 

Selectivity:  Better than 70 dB 

Image Rejection:  Better than 90 dB 

IF Rejection:  Better than 90 dB 

Spurious Rejection:  Better than 100 dB 

AM Suppression Ratio:  Better than 100 dB 

Frequency Response: 20 - 15,000 Hz (±1 dB)

Total harmonic Distortion: less than 0,3% (98 MHz)

Separations at 1 kHz :  Better than 38 dB 

Separation at 10 kHz :  Better than 25 dB 

SCA Suppression Ratio:  -50 dB 

Frequency Drift:  less than 0,015%

Output Level

Variable :  0 - 1,0 V

Fixed :  0,4V ±1 dB 

Antenna  Terminals:  75 Ω  (Unbalanced); 300 Ω  (balanced)

Controls:  FM/AM tuner meter; FM fine tuning meter; FM stereo indicator; Muting; Level control; MPX hi-blend

AM Tuner Section

Frequency Range:  535 - 1605 kHz 

IF Amplifier Stage:  2 stages (with 1 CF)

sensitivity:  15 µV  (S/N=20 dB)

Selectivity:  25 dB  (±10 kHz)

Image rejection:  Better than 45 db

Total harmonic Distortion:  1,5%

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

Output Level

Variable :  0 - 1,0 V

Fixed :  0,4V ±1 dB 

Antenna Terminals:  External antenna terminal; Ferrite bar antenna

Meter:  Tuning meter

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

Power Consumption:  20 W

Power Outlet:  Unswitched

Dimension s (W x H x D):  16-5/8" x 5-3/8" x 12-1/2"

Weight:  16,5 lbs

Dual CS 741Q turntable

Dual 741Q The finest turntable Dual has ever made. Handsome new design provides ideal integration of form and function.

There is always a special attitude at Dual about the turntable that represents the most advanced thinking and accomplishment of Dual's designers and engineers.

The materials, the care in manufacturing and quality control must exemplify all that has made Dual precision and reliability so highly regarded throughout the world. And in every aspect of performance, this turntable must set the standard by which other fine turntables are judged. Even more, it must make a significant contribution to the art of record playback.

Now, as never before, Dual's finest turntable , the 741Q , expresses this attitude to perfection.

Hydrodynamic suspension system.

radically new design floats the tonearm, motor and platter as one unit on four cylinders, each filled with special viscous fluid. This system absorbs virtually all spurious energy originating in sound waves as well as vibrations caused by footfalls or other movements in the room.

Turnable acoustic isolator

Each isolator is adjustable to provide maximum protection from either acoustic feedback or external shock

Turntable anti-resonance filter housed in counter-balance.

Matches ULM tonearm to mass and compliance of any cartridge. Resonant amplitude can be reduced as much as 50 percent, depending on cartridge. Feedback is reduced, tracking ability improved and the sound is appreciably cleaner.

Effective  Dual's exclusive suspension systems as demonstrated in comparative shock tests>

Note difference in recovery times after each turntable was subjected to vertical shock

Highly-respected European turntable considered virtually immune to vibration

Well-known Japanese turntable with damped sub-chassis

Dual turntable damped by Hydrodynamic system and turntable acoustic isolators.

New flush-mount dust cover.

Unique hinge design allows cover to be opened and closed without extending beyond rear of turntable. This allows the unit to be positioned close to rear wall. Also adjustable hinge tension holds cover open at any angle.

Quartz PLL direct drive with LED speed read-outs.

Exact pitch-control deviations from standard speeds are shown throughout 12 percent range. Pitch-control settings remain in memory for comparisons with quartz-controlled 33 rpm and 45 rpm speeds.

Specifications

Operation:  Manual Start and Stop; Automatic Stop; Damped cue-control; Continuous repeat; Pitch control 12 % range

Tonearm: Four point gimbal, and anti-resonance filter

Effective Length:  8-3/4 inch

Bearing Friction :  0,007 grams

Total Effective Mass with ULM Cartridge:  8 grams

Cartridge Range:  2 - 9 grams

Minimum Tracking Force:  0,25 grams

Anti-skating System Calibrated: for all styli

Motor Type:  Quartz PLL

Drive System:  Direct drive

Platter Size:  12"

Illuminated Strobe - Yes

Rumble:  better than 80 dB (weighted DIN B)

Wow and Flutter:  ±0,015% (WRMS)

Dimensions  Chassis:  17-1/2" x 15-3/16" x 2-3/16"

Height with Cover:  5-1/12"

ULM Cartridge Series

Model:  ULM 60

Stylus Type:  Elliptical

Tracking Force:  0,75 - 1,50 grams

Frequency Response:  10 Hz - 30 kHz

FIM Distortion:  less than 0,8%

Output Voltage at 1000 Hz per 5 cm/sec:  3 mV

Compliance:  30 m/mN

Channel Separation:  better than 28 dB (at 1 kHz)

Net Weight:  2,5 grams

 

DBX 110 control

 DBX 110 - Subharmonic Synthesizer

The Model 110 is a unique product that can solve one frequency response problem common to all stereo systems. Right now, your system can't produce bass frequencies much below 50 Hz, simply because that's the limit of most records, tapes and FM signals. That means you don't get the deepest bass notes, the kind you feel as well as hear. The Model 110 corrects that problem. Technically, what the 110 does is easily understood. It samples the low frequency fundamentals of your music. Then it passes these signals through while simultaneously reproducing them a full octave lower. both signals are then mixed back in at relative levels that you control.

Musically, what the 110 does is extraordinary. it re-creates the natural subharmonics of the original sound, making your room vibrate with a depth of bass you've never heard before - or felt - except in a live performance.

Specifications 

Dynamic Range (Peak signal to weighted background noise):  100 dB

Input Impedance :  47 k Ω 

Input Level (Nominal):  300 mV

Input Level (Maximum):  7 V RMS

Output Impedance (Designed to drive 5 k Ω  or greater):  470 Ω 

output Level (Maximum):  20 Hz to 20 kHz):  7 V RMS

Frequency Response:  20 Hz to 20 kHz ±1 dB

Equivalent Input Noise (Unweighted, 20 kHz bandwidth, referenced to 1 V):  -85 dBV

Total harmonic Distortion:  0,1% (Typical, main signal channel)

Intermodulation Distortion (SMPTE):  0,15% Main signal channel

Power Line Requirement:  117 V AC, 50 Hz to 60 Hz

Power Line  Consumption:  10 W

dimensions (W x H x D):  186 x 95 x 263 mm (7-5/16" x 3-3/4" x 10-3/8")

Weight:  2,26 kg (5 lbs , shipping)