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)

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)