JVC JT-V31 tuner

JVC JT-V31 High Fidelity FM/AM Tuner

What do you want from a tuner? Easy station selection and high fidelity sound are the two most important things, naturally. But how can you be sure that the tuner you're about to buy will deliver them? Here's what our JVC audio engineers have to say about the new JT-V31.

"Providing the two most basic function of a tuner, if it is to be strictly hi-fi, is a challenge most research labs and theoretical thinkers think is easy to meet. But in practice you find that an ingenious circuit designed to solve one problem - say that of increasing FM selectivity - might lower the sensitivity, or degrade other specifications, once you get it wired into your prototype model. So the so-called perfect circuit is not so ingenious after all. In truth, we've made the best compromises we could in the JT-V31. It's really state-of-the-art and we think it's a lot of tuner for the money."

The longer you own it, the more you'll appreciate it. It's the JT-V31 from JVC - Listening for the future.

FM 65 dB Selectivity

Selecting the station you want in FM-crowded urban areas is a growing problem in tuners not built for the job. The JT-V31 however has a new 4-resonator type single-unit ceramic filter to help achieve an impressive 65 dB selectivity without degrading other important specifications.

Precision Built FM Frontend

A dependable frequency linear tuning capacitor in the FM frontend increases sensitivity to distant or weak stations and affords high tuning precision.

FM Stereo PLL Circuit

The newly developed PLL (Phase-Locked Loop) circuit in an IC form delivers outstanding stereo separation over an IC form delivers outstanding stereo separation over a wide frequency range with more reliability and stability than conventional multiplex (MPX) circuits. Independent left/right-channel low-pass filters eliminate crosstalk for more precise sound image location.

IC Construction

Three high-integration IC formed blocks, one each for the FM-IF FM-MPX, and AM, guaranties dependability and reduce service needs.

FM/AM Tuning Ease

The extra long (240 mm ) dial is frequency linear for FM and is designed scientifically for easiest reading in actual use. The mechanism has a high-inertia flywheel and stretch-free "radial cord" cables to maintain high precision operation in all types of environment.

Twin Tuning Meters

The signal strength meter (FM an AM) at the left side of the meter window always responds in linear proportion to the strengths of incoming signals without overloading. Its circuit is the integral-linear type and is never :fooled" (saturated). The FM tuning meter at the right is equally well built, providing visual confirmation of the tuning of an FM signal to the point where distortion is minimal and stereo separation best.

Additional Features

Hi-Blend Switch - Enables elimination of high-frequency FM noise for optimum stereo separation

Low Distortion AM  - IC with self-contained RF amp. low-pass filter and ceramic filter assures clear, pleasant AM sound.

FM Muting - Switch ON (in normal position) to eliminate FM inter-station noise, or OFF to tune in weak or distant stations.

Specifications

FM Tuner Section

Tuning Range:  88 MHz – 108 MHz

Usable Sensitivity (IHF):  1,9 µV

50 dB Quieting Sensitivity

Mono :  4,0 µV

Stereo :  40 µV

Distortion at 100 Hz

Mono : 0,2%

Stereo :  0,5%

Distortion at 1 kHz

Mono : 0,2%

Stereo :  0,35%

Distortion at 6 kHz

Mono : 0,2%

Stereo :  0,4%

Signal-to-Noise-Ratio:

Mono  :  72 dB

Stereo  :  50 dB

Selectivity:  60 dB

Capture Ratio:  1,2 dB

Alternate Channel Selectivity:  60 dB

Spurious Response Ratio:  80 dB

Image Response Ratio:  60 dB

IF Response Ratio:  90 dB

AM Suppression Ratio:  50 dB

Stereo Separation:  40 dB (at 100 Hz); 45 dB  (at 1 kHz); 35 dB  (at 10 kHz)

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

Subcarrier Product Ratio:  50 dB

Output Level:  750 mV  (400 Hz, 100% Mod.)

AM Tuner Section

Tuning Range:  525 kHz – 1605 kHz

Usable Sensitivity:  300 µV/m (Bar antenna); 50 µV  (External antenna)

Signal-to-Noise-Ratio:  50 dB

Distortion :  0,5%

Selectivity :  30 dB

Image Response Ratio:  45 dB

IF Response ratio:  45 dB

Output Level:  750 mV  (400 Hz, 100% Mod.)

General

Power Sources

AC 120 V, 60 Hz (USA, Canada)

AC 220 V, 50 Hz (European Countries)

AC 110/120/220/240 V, 50/60 Hz (Other Countries)

Dimensions (W x H x D):  390 x 152 x 358 mm (15-11/32” x 6” x 14-3/32”)

Weight:  5 kg (11 lbs)

 

JVC VN-900 amplifier

JVC VN-900 amplifier

Features:

220 Watts power output

Power Bandwidth 20 Hz to 20,000 Hz

Phono input load switch

S.E.A. control system

S.E.A. record switch for tape recording

Dual facilities for tape monitoring and tape dubbing

All-stage direct-coupled OCL circuitry

Automatic transistor protector circuitry

Terminals for 4-channel connection

Pink noise generator built-in

Sound Effect Amplifier (S.E.A,)

The Sound Effect AMplifier is a feature unique to JVC which gives you more control over tone than has ever before been possible. it was never found outside professional recording studios before JVC incorporated it in their amplifiers and receivers. The advantages of the S.E.A. system are:

It gives the listener complete control of the tone throughout the entire frequency range.

By adjusting the controls entirely new sounds can be created

Tone can be adjusted to compensate for variations in the transmission system; recording method , type of music, characteristics of your stereo system and the acoustic properties of your room.

Unlike other tone control systems which have only a bass and treble control, the S.E.A. has seven controls. Each of these controls makes it possible to vary the response in a different frequency range. S.E.A. gives a steeper gradient at both the high and low frequency end of the response curve than the conventional system which is limited to 6 dB/oct. The outstanding feature is S.E.A.'s handling of the midrange frequencies. the conventional tone control system controls only the high and low ranges whereas S.E.A. extends this control to cover the whole frequency range.

Specifications

Type:  Solid State Stereo Integrated Amplifier

Semiconductors:  39 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

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

Power Amplifier Section

IHF Dynamic Power:  

170 W (85 + 85 W) at 8 Ω  load

220 W (110 + 110 W) at 4 Ω  load

Continuous Power RMS

120 W (60 W + 60 W) at 8 Ω  load one channel driven

160 W (80 W + 80 W) at 4 Ω  load one channel driven

100 W (50 W + 50 W) at 8 Ω  load both channel driven

120 W (60 W + 60 W) at 4 Ω  load both channel driven

Power Bandwidth

10 Hz - 23 kHz (8 Ω  load one channel driven, output power 50 W THD 0,25%)

20 Hz - 20 kHz (8 Ω  load both channel driven, output power 50 W THD 0,25%)

Total Harmonic Distortion:  0,05% at rated power (1 kHz)

Intermodulation Distortion: 0,4% at rated power

Frequency Response:  3 Hz - 450 kHz (-3 dB) at 1 W

Damping Factor:  50 Hz at 8 ohm load

Matching Load Impedance:  4 - 16 Ω 

Input Sensitivity for Rated Power:  1 V

Preamplifier Section

Frequency Response:  20 Hz - 50 kHz ±0,5 dB

S.E.A. Controls

Center Frequency :  40; 150; 400; 1,000; 2,400; 6,000; 15,000 Hz

Control Range:  ±12 dB

Input Sensitivity For Rated Power:  

Phono :  2,5 mV

Aux :  200 mV

Tape Playback :  200 mV

Signal-to-Noise-Ratio: 

Phono :  56 dB

Aux :  86 dB

Equalizer:  RIAA (Mag) ±0,5 dB

Phono Overload:  700 mV (p-p) at 1 kHz; 250 mV RMS

Recording Out Level

PIN Jack :  180 mV

DIN Jack :  20 mV

Filters

Subsonic :  18 Hz 12 dB/oct

High :  9 kHz -12 dB/oct

Muting:  -20 dB

Loudness:  at -30 dB point; 1 kHz (+15 dB); 10 kHz (+4 dB);50 Hz (+11 dB)

Pink Noise Generator:  0° , 180° 

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

Power Consumption:  230 W

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

Weight:  28 lbs

 

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 Ω  load

140 W (70 + 70 W) at 4 Ω  load

Continuous Power RMS

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

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

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

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

Power Bandwidth

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

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

Total harmonic Distortion:  0,05% at rated power (1 kHz)

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

Frequency Response:  3 Hz - 450 kHz (-3 dB) at 1 W

Damping Factor:  50 Hz at 8 Ω  load

Matching Load Impedance:  4 - 16 Ω 

Input Sensitivity for Rated Power:  1 V

Preamplifier Section

Frequency Response:  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

Signal-to-Noise-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 (W x H x D):  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

JVC JT-V11 tuner

Here’s a new JVC high-fidelity tuner to make an ideal mate for any of the JA-S stereo integrated amplifiers, particularly the JA-S11. Add a turntable and pair of speaker systems and your audio system is ready to move you into an exciting musical adventures. Among the many first-class features of this well-built model are its big twin tuning meters.

Wide 240 mm Tuning Dial

we are able to equip our tuners with wide tuning dials because our tuning mechanisms are precision designed to guarantee accurate station indication and a smooth “feel” . JVC knows how important easy-to-read dials can be to your radio listening pleasure. So we’ve made extra sure that the 240 mm (9-7/16”) wide dial on the JT-V11 is accurately calibrated and that the heavy flywheel/tuning knob mechanism offers a good feel as well.

Twin Tuning Meters

station selection is quick and easy because this unit is equipped with two meters – one for signal strength and the other for centre of channel in FM. Both are very large and well illuminated. For accuracy, they feature tested circuits, so that you’ll never be fooled by false indication.

Switch

One switch does it all. We’ve combined the FM Muting function with the mono-auto FM selector for user convenience. Setting the switch to FM Auto automatically engages the FM muting circuit to end inter-station noise you hear while tuning a station. Stations with weak signals and little hi-fi quality are effectively cut out; you only hear FM stations with sufficient hi-fi parameters.

Dependable Electronics

We’ve employed the best of our electronics techniques in designing the JT-V11. A total of three high-integration ICs – one each for FN IF, FM MPX (Multiplex) and AM  - are employed. Total circuit dependability is the key advantage of this IC construction. Additionally a PLL (Phase Locked Loop) FM MPX is used for wide stereo separation. Then, an FM IF Filter – a new 4-resonator single-unit ceramic filter – that improves selectivity and hi-fi specifications.

 

Specifications

FM Tuner Section

Tuning Range:  88 MHz – 108 MHz

Usable Sensitivity (IHF):  1,9 µV 

Sensitivity for 50 dB  S/N (Stereo):  40 µV 

Distortion

Mono : 0,2% (1 kHz )

Stereo :  0,4% (1 kHz )

Signal-to-Noise-Ratio: 

Mono  :  72 dB 

Stereo  :  50 dB 

Selectivity:  60 dB 

Capture Ratio:  1,0 dB 

IF Rejection:  90 dB 

Stereo Separation:  35 dB (at 100 Hz); 40 dB  (at 1 kHz); 30 dB  (at 10 kHz)

Frequency Response:  30 Hz  – 12 kHz +0,5 dB , -2,5 dB 

Output Level:  650 mV  (400 Hz, 100% Mod.)

AM Tuner Section

Tuning Range:  525 kHz – 1605 kHz

Usable Sensitivity:  300 µV/m (Bar antenna); 50 µV  (External antenna)

Signal-to-Noise-Ratio:  50 dB 

Distortion :  0,5%

Selectivity :  30 db

General

Dimensions (W x H x D):  390 x 152 x 358 mm (15-11/32” x 6” x 14-3/32”)

Weight:  5 kg (11 lbs)

 

JVC A-X2 amplifier

Super-A Integrated Amplifier

For years, audiophiles have praised the purity, depth and naturalness of Class-A amplifiers.

But they haven't been wild about the heat, weight, power limitations and high cost that go hand-in-hand with Class-A's low efficiency and high idling currents. That's why Class-A has remained a rare, esoteric design chosen by the few who were willing to pay for its fidelity and put up with its limitations.

JVC Super-A design brings together the purity of Class-A and the efficiency of the more common Class-AB. By eliminating most of  the measurable switching and crossover distortion. Super-A achieves the kind of sound that has distinguished Class-A designs of the past.

At the same time, Super-A is as efficient as Class-AB, so there are no heat and weight problems which also drive up the cost of conventional Class-A. and JVC Super-A amplifiers have no transient intermodulation distortion (TI) thanks to very wide bandwidth capabilities. What's more, the A-X2 Zsuper-A amplifier shown here includes a 5-band graphic equalizer for both normal playback and recording EQ. LED power meters, "direct power supply" which yields high damping factor at all frequencies, and JVC's Triple Power protection system.

All this comes with plenty of power behind it; 40 watts per channel continuous (RMS) power into 8 ohms, from 20 to 20,000 Hz, with no  more than 0,007% Total Harmonic Distortion:.

Specifications

Output Power (Both channel driven):  

40 watts per channel, min. RMS into 8 ohms, from 20 to 20,000 Hz, with no  more than 0,007% Total harmonic Distortion

42 watts per channel into 8 ohms at 1 kHz

Total Harmonic Distortion:: 

 0,007% at rated output, from 20 - 20,000 Hz, 8 Ω

0,003% at rated output at 1 kHz, 8 Ω

Intermodulation Distortion:  0,007% at Rated output,, * Ω

Power Bandwidth:  10 Hz - 30 kHz (IHF, both channels driven, 8 Ω, 0,02% Total harmonic Distortion:.)

Frequency Response:  10 Hz - 100 kHz +0 -3 dB

Damping Factor:  50 (1 kHz, 8 Ω)

Tone Controls:  S.E.A.

Center Frequency:  40; 250; 1 k; 5 k; 15 kHz

Control Range:  ±12 dB

Input Sensitivity/Impedance

Phono :  2,5 mV/47 kΩ

Tuner, Tape, Aux ;  150 mV/40 kΩ

Rec. Output Level:  150 mV

Phono EQ. Deviation:  ±0.5 dB (20 Hz - 15 kHz)

Phono Overload:  150 mV (1 kHz)

Signal-to-Noise-Ratio:

Phono :  73 dB (new IHF)

Tuner, Tape, Aux :  77 dB (new IHF)

Loudness Control (Volume Control at -30 dB position):  +6db at 100 Hz; +4 dB at 10 kHz

Dimensions (W x H x D):  420 x 120 x 329 mm (16-1/2" x 4-11/16" x 12-5/16")

Weight:  6,6 kg (14,6 lbs)

JVC KD-A33 cassette tape deck

Metal-compatible cassette deck

If you've found that an affordable price usually means a sacrifice of performance, take heart. The JVC KD-A33 metal compatible cassette deck includes much of the technology found in our most expensive decks. Yet it happens to be one of our least expensive decks.

For example, it uses Sen-Alloy heads. These JVC-developed heads handle tremendously high currents with ease, so they're especially well  suited for recording and erasing metal tape. And SA's superb electromagnetic and physical properties give you accurate frequency balance, superb extension and low distortion through years of use.

When you use metal tape with the KD-A33, you'll get all the performance you expect from metal . But when your budget  dictates using a less expensive ferric-oxide tape, you can still get metal-like sound thanks to another JVC development - Super ANRS.

In recording, Super ANRE reduces the level of high-frequency signals so the tape can handle them without, saturating, in playback, it boosts them back to their original level. As a result, sounds like cymbal crashes, trumpet blast, and spoken sibilants (normally the downfall of cassette recording) are reproduced with astonishing clarity and fidelity to the original

 

 

 

And like our most expensive decks, the KD-A33 has logic-governed solenoid transport controls. You can switch directly between modes, even from "rewind" to "fast forward" with just a light touch of a switch. The KD-A33 also has provisions for adding a timer device and optional remote control.

Specifications

Type:  Stereo cassette deck

Track System:  4-track, 2-channel

Tape Speed:  4,8 cm/s (1-7/8 inch/sec)

Frequency Response (0 VU Recording)

Metal Tape :  30 - 12,500 Hz (±3 dB)

SA/CrO₂ Tape :  30 - 8,000 Hz (±3 dB)

SF/Normal Tape :  30 - 8,000 Hz (±3 dB)

Frequency Response (-20 VU Recording)

Metal Tape :  20 - 18,000 Hz [30-16,000 Hz ±3 dB]

SA/CrO₂ Tape :  20 - 18,000 Hz  [30-16,000 Hz ±3 dB]

SF/Normal Tape :  20 - 17,000 Hz  [30-16,000 Hz ±3 dB]

Signal-to-Noise Ratio (from peak level, weighted, Metal Tape) :  60 dB

The Signal-to-Noise Ratio is improved by 5 dB at 1 kHz and by 10 dB above 5 kHz with ANRS on

(DIN  45 500 weighted)

Effect of Super ANRS (Normal Tape)

Improvement of S/N :  the same as with ANRS

Improvement of Frequency Response :

0 VU Recording :  6 dB at 10 kHz

+5 VU Recording :  12 dB at 10 kHz

Improvement of Distortion :

0 VU Recording :  3% or less at 10 kHz

+5 VU Recording :  2% or less at 10 kHz

Wow and Flutter:0,04% (WRMS); 0,14% (DIN  45 500)

Crosstalk:  65 dB (1 kHz)

Harmonic Distortion :  K3; 0,4$ T.H.D.; 1,0% (metal Tape , 1 kHz 0 VU)

Bias :  AC Bias

Erasure :  AC erasure (85 kHz)

Heads:  2 heads; Sen Alloy head for recording/playback and 2-gap Sen Alloy head for erasure

Motors : 

Capstan :  Electronic Gaverned DC motor

Reel :  DC motor

Fast Forward Time :  85 sec. With C-60 cassette

Rewind Time :  85 sec. With C-60 cassette

Semiconductors:  7 ICs; 57 Transistors; 31 Diodes

Input Sensitivity/Impedance

Mic Jack x 2 :  0,2 mV (max.)-72 dBs/ 600 Ω  - 10 K Ω  (matching impedance

Line Input x 2 :  80 mV (-20 dBs)/100 K Ω

Output Level/Impedance

Line x 2 :  300 mV/5 ko hm

Phones x 1 :  0,3 mW/ 8 Ω  - 1 k Ω

DIN Socket: 

Input Level :  0,1 mV/k Ω

Input Impedance :  10 K Ω

Output Level :  300 mV (8 Ω )

Output Impedance :  5,5 k Ω

Matching Impedance :  50 K Ω  or more

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

Power Consumption:  21 W

Dimensions (W x H x D):420 x 120 x 300 mm (16-1/2: x 4-3/4" x 11-7/8")

Weight:  6,7 kg (14,7 lbs)

 

JVC QL-Y5F turntable

Electro-Servo Fully Automatic Quartz Turntable

The Flagship of JVC's Fine Line of Turntable

Features

E-D Servo tonearm for reduced resonance

Double-Servo Quartz control

Cog-free coreless DC servo motor

Electronic resonance-damping, tracking-force and anti-skate controls

Computerized fully automatic convenience with repeat

 

The design objectives for our top-of-the-line turntable were simple; eliminate all unwanted resonance, speed error, noise and vibration while offering fingertip computer control convenience. The superlative QL-Y5F attests to our success, and we were able to make it beautiful to boot Read on.

 

JVC E-D Servo tonearm

A genuine breakthrough

JVC engineers isolated "tonearm resonance" as the most inimical of all conceivable resonance in a turntable, since it colors reproduction, adds distortion (particularly intermodulation) and prevents accurate arm tracking. JVC's E-D Servo tonearm solves the problem of "sympathetic resonance". See the full description of this remarkable tonearm on the next page.

The E-D Servo tonearm - construction

Two coreless linear motors are used in the E-D Servo tonearm. One, housed inside the structure positioned to the right of the vertical bearing, controls and adjust the arm's vertical position in relation with the record's surface. The other, positioned below the tonearm base, controls and adjust the arm's horizontal position in relation to the record groove.

Even warped records are no challenge to the E-D Servo tonearm

The E-D Servo system successfully damped the tonearm to shut out audible damage caused by low-frequency infrasonic and external vibration. The result is better record tracking, lower distortion a higher signal-to-noise ratio and even better Wow and Flutter.

 

Our Improved Double-Servo Quartz system has made speed control 30 times more accurate

Speed accuracy is nearly flawless thanks to the Double-Servo Quartz speed detection system for the platter motor

 

Coreless DC servo motor is cog-free yet powerful

Our coreless DC servo motor has no cores for cog-free, smooth rotation, yet has 50% more torque than conventional coreless designs, thanks to a push-pull drive circuit.

 

Up-front, light-touch controls and fully automatic operation for a unique operating experience

All the controls for this JVC masterpiece are on the front panel. All arm movements - up, down, left and right - are possible in the manual mode via light-touch buttons. Full automatic operation is supervised by a microcomputer and initiated by the Start/Stop button.

 

Other features:

Repeat for infinite playback of one record

Solid one-piece headshell doesn't rattle or resonate

Height adjustable tonearm arrangement (±3 mm)

LED indicators for speed, quartz-lock, record size, repeat and arm cue

Rosewood veneer cabinet, polished to a rich mirror finish.

 

Specifications

Type:  Coreless DC servo motor

Drive System:  Direct-drive

Speed Detection System:  Integrated FG

Servo System:  Double-servo Quartz system

Speed Change:  Electronic Switching

Start-up Time:  1,2 sec.

Wow and Flutter:  0,025% (WRMS); 0,04% (DIN)

Signal-to-Noise Ratio:  78 dB (DIN-B)

Start-up Torque:  1000 g/cm

Speed Deviation:  0,002%

Load Characteristics:  0% (under 100 g loads)

Drift:  0,0001%/H

Voltage Drift:  0%

Thermal Drift:  0,00005%/°C

Platter

Size:  310 mm die0cast aluminum

Weight(with mat):  1,5 kg

Tonearm

Type:  Statically balanced electronic servo controlled arm

Effective Length:  245 mm

Tracking Error:  +1°48". -1°31"

Overhang:  15 mm

Applicable Cartridge Weight (headshell included):  14,5 - 24 g

Arm Elevation Range:  ±3 mm

Operation Mode:  Fully-automatic

General

Dimensions (H x W x D):  169 x 480 x 436 mm (6-5/8" x 18-7/8" x 17-3/16")

Weight:  10,5 kg (23,1 lbs)

 

JVC QL-Y3F turntable

 

Features:

Electronic Tonearm technology Teamed with Quartz Precision

E-D Servo for horizontal arm movement

Double-Servo Quartz control

Cog-free coreless DC servo motor

Electronic anti-skate control

Computerized fully automatic convenience

 

It holds its own against the most expensive turntables on the market, even comparing favourably with the sophisticated QL-Y5F from which it borrows many of its features. Yet the QL-Y3F is priced well below the level set for professional equipment of similar specs and features. Speed error is practically nil thanks to the JVC Double-Servo Quartz detection system and our coreless DC servo motor; handling convenience is enhanced by fully automatic controls identical with those of the QL-Y5F, and the problems of spurious arm movements are solved with our E-D Servo tonearm

 

E-D Servo for horizontal arm movement falls resonance

A modified version of the JVC E-D Servo tonearm is at work in this model to keep horizontal arm movements under control. As in the more elaborate QL-Y5F, the arm base contains a coreless linear motor with a horizontal velocity detection system, intermodulation distortion is never a problem, since infrasonic signals (10 Hz or lower) are remedied harmless by this arm control servo. The system also applies an optimum amount of antiskating force.

 

Cogging is banished by our coreless DC servo motor

Cogging is the tiny fits and starts exhibited in the rotation of many electric motors. Our special servo motor has no core; thus cogging is banished. Platter speed is more accurate than ever. Reliable speed accuracy is further improved by our Double-Servo Quartz control system.

 

Up front controls are designed for one-touch fully automatic operation

A capable microcomputer, contained in a programmed-to-order LSI, coordinates all circuits and controls for error-free fully-automatic operation. Push a button and the automatic mechanism takes care of the rest; platter start, cueing, lead-in, lead-out and end-of-play shutoff. The-up-front controls are light-touch sensitive - truly luxurious.

 

Other features:

Repeat for uninterrupted playback of a record

Solid one-piece headshell doesn't rattle or resonate

Height-adjustable tonearm arrangement (±3 mm)

LED indicators for speed quartz lock and record size.

 

Specifications

Type:  Coreless DC servo motor

Drive System:  Direct-drive

Speed Detection System:  Integrated FG

Servo System:  Double-servo Quartz system

Speed Change:  Electronic Switching

Wow and Flutter:  0,025% (WRMS); 0,04% (DIN)

Signal-to-Noise Ratio:  78 dB (DIN-B)

Start-up Torque:  650 g/cm

Speed Deviation:  0,002%

Load Characteristics:  0% (under 100 g loads)

Drift:  0,0001%/H

Voltage Drift:  0%

Thermal Drift:  0,00005%/°C

Platter

Size:  310 mm die0cast aluminum

Weight(with mat):  1,5 kg

Tonearm

Type:  Statically balanced electronic servo controlled arm

Effective Length:  245 mm

Tracking Error:  +1°48". -1°31"

Overhang:  15 mm

Applicable Cartridge Weight (headshell included):  14,5 - 19 g

Arm Elevation Range:  ±3 mm

Operation Mode:  Fully-automatic

General

Dimensions (H x W x D):  169 x 480 x 436 mm (6-5/8" x 18-7/8" x 17-3/16")

Weight:  10 kg (22,1 lbs)

 

JVC L-A31 turntable

Auto-Return Direct -Drive Turntable

Features

Cog-free coreless DC servo motor

FG direct-drive system

Low-mass straight tonearm

Up-front controls

Auto return convenience and pitch control

 

Sharing many features with JVC's more advanced turntables is the L-A31. like every other JVC turntable, it has the JVC-exclusive cog-free coreless DC servo motor to smooth rotation and deliver high torque, and our FG direct-drive system to maintain speed accuracy. Rotational speed is constantly adjusted against any variations, whatever the cause. Our low-mass straight tonearm is consistent with current thoughts on the subject; low-mass improves tracking, allowing the use of even quality high-compliance cartridges. Its straight design further reduces mass and increases rigidity. Resonance is optimally just above warp frequencies while remaining below audible frequencies and our ultra-light non-resonating headshell is included. Operation is simple, convenient and smooth. Controls are up-front, outside the closed dust cover - even arm cueing. Cueing and end-of-play auto return are two amenities added to protect records and stylus. Record handling is reduced to a minimum. Other features are the built-in strobe and a pitch control for "tuning" your records. We're sure that feature for feature and spec for spec, there isn't a finer turntable available.

 

Specifications:

Motor

Type :  Coreless DC servo motor

Drive System :  Direct-drive system

Wow and Flutter:  0,03% (WRMS); 0,05% (DIN)

Signal-to-Noise Ratio:  75 dB(DIN-B)

Platter:  295 mm die-cast aluminum alloy

Tonearm

Type:  Statically-balanced arm on Tracking Hold system

Effective Length:  220 mm

Tracking Error:  +3°35', -0°43'

Overhang:  15 mm

Tracking Force:  0 - 3g (o,1 steps)

Cartridge Weight (Headshell Included):  8,5 - 12,0 g

Operation Mode:  Auto-return

General

Dimensions (W x H x D):  420 x 115 x 355 mm (16-9/16" x 4-1/2" x 14")

Weight:  5,2 kg (11,4 lbs)

 

JVC L-A21 turntable

 

Auto-Return Belt-Drive Turntable

Features:

Quiet and accurate belt-drive

Precision synchronous motor

Low-mass straight tonearm

Up-front controls

Auto return convenience

 

The design objectives for our lowest cost turntable were for the most performance and features at a price easily accessible to anyone. Check the features and specifications of the L-A21 and you'll agree that we met all our design objectives. Our reliable belt-drive system eliminates vibration and noise and promotes smooth platter rotation. And our motor is an advanced synchronous type - impervious to changes in line voltage. Our tonearm, like those found on our more expensive models, is of a low-mass design for high tracking and low distortion while its straight tube design reduces spurious movement of the arm due to dynamic torsion. Our special headshell is non-resonant yet extremely rigid. We've also included a cueing device and the auto return mechanism. Like all its operating controls, the cue button is outside the closed dust cover so there's little chance of nudging the tonearm and damaging record or stylus . All in all, a great bargain at any price.

 

Specifications:

Motor

Type :  4-pole synchronous motor

Drive System :  Belt-drive system

Wow and Flutter:  0,08% (DIN)

Signal-to-Noise Ratio:  63 dB(DIN-B)

Platter:  300 mm die-cast aluminum alloy

Tonearm

Type:  Statically-balanced straight arm

Effective Length:  220 mm

Tracking Error:  +4°, -0°48'

Overhang:  15 mm

Tracking Force:  0 - 3g

Cartridge Weight (Headshell Included):  8,5 - 11,5 g

Operation Mode:  Auto-return

General

Dimensions (W x H x D):  420 x 115 x 350 mm (16-9/16" x 4-1/2" x 14")

Weight:  4,5 kg (9,9 lbs)

JVC CD-1770 cassette deck

For people who prefer to place their decks on an open shelf or table, the CD-1770 has the time-tested top-load design. Its reliable tape transport mechanism offers a low wow and flutter of only 0,12% (DIN 45 500) or 0,04% (WRMS). JVC's own ANRS/Super ANRS noise reduction systems. SA (Sen-Alloy) record/playback head, 5-LED Multi-Peak indicator and other numerous technical features assure exceptional versatility and dependable performance.

 

Finest Tape Transport.

The exceptionally low 0,12% (DIN 45 500) wow and flutter in this fine deck is mainly credited to the use of a frequency controlled DC servomotor. It provides more stable and higher torque and less speed deviation than AC-operated motors. A dual-belt independent Drive Mechanism, another JVC-exclusive is also used to drive the capstan and the tape reels separately, thus preventing the vibration of the tape reels from affecting the capstan revolution. This further assures exceptional speed accuracy at all times.

 

Versatile Recording Aids

The CD-1770 offers JVC's 5-LED Multi-Peak Indicator in Addition to a pair of large level meters. This Indicator responds even to pulse-like peak signals of very short durations. Using the indicator and the level meters together will enable you to adjust the recording levels to the maximum and avoid distortion. There also are two pairs of recording level controls for MIC (DIN) and Line, to let you mix microphone signals with line inputs from any programme source of your choice.

Convenience Features

Memory Tape Counter for memory stop. Air-damped cassette compartment lid. Full automatic stop, illuminated cassette compartment for easier tape inspection Six push-button Bias and Equalizer selectors to obtain maximum performance from any kind of tape. Timer Standby facility.

 

Specifications

Heads:

Record/Playback :  Sen-Alloy Head

Erase :  Two-Gap Ferrite Head

Motor:  Frequency-Controlled  DC Servo Motor

Fast Forward / Rewind Time:  75 sec. (with C-60 cassette)

Bias and Erase System:  AC-95 kHz

Frequency Response  (typical)

Chrome Tape :  30 - 16,000 Hz

Normal Tape :  30 - 16,000 Hz

Signal-to-Noise Ratio:  56 dB (from Peak Level Weighted) without ANRS. The S/N is improved by 5 dB at 1 kHz and 10 dB above 5 kHz with ANRS on

Wow and Flutter:  0,04% (WMRS); 0,12% (DIN 45 500)

Crosstalk:  65 dB (1 kHz)

Channel Separation:  35 dB (1 kHz)

Total Harmonic Distortion :  1,2%

Input Sensitivity/Impedance

Mic  :  0,2 mV/600 - 10 k Ω

Line In  :  80 mV/470 k Ω

DIN :  0,17 mV/k Ω 

Output Level/Impedance

Line Out  :  0-500 mV/6.8 k Ω

Headphone :  0-0,3 mW / 8 - 1 k Ω

DIN :  0-500 mV/6.8 k Ω

Power Supply:  120 / 220 / 240 V, 50/60 Hz

Power Consumption:  5 watts

Dimensions (W x H x D)):  426 x 126 x 277 mm (16-3/4" x 4-15/16" x 10-7/8")

Weight:  5,5 kg  (12,1 lbs)