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)

 

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 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)

 

Pilot Pilotuner FM-607

The famous FM Pilotuner brought up to date with the latest advances in FM design at an amazing price for a true High Fidelity Tuner. This new Model FM-607 incorporates many features of the most expensive tuners and is built to Pilot's high standard of quality. Enjoy FM at its best with this Pilotuner.

 

General Features

Self-contained power supply for use on 117 volt, 60 cycle AC lines

Slide rule dial with illuminated scale

Audio input for Phono or Auxiliary TV operation controlled by selector switch

Two-stage audio amplifier, cathode follower output, to permit up to 100 feet of interconnecting leads for remote operation of audio amplifier without loss of fidelity.

Self-contained and fully enclosed front panel assembly, beautiful gold-finish completely impervious to fingerprints. Unit may be left open on shelf or table or front escutcheon may be readily dismounted for cabinet installation.

 

Special Features

Built-in power line antenna

2 Gang Condenser Tuning System

Automatic frequency control (AFC) for case in running

One position of selector switch provides for turning off the AFC to allow tuning to a weak station adjacent to a strong station.

Tuned RF Amplifier stage for improved sensitivity and selectivity

Temperature compensated oscillator for negligible drift

Fully shielded against oscillator radiation to conform with FCC radiation specifications

Convenience Outlet, controlled by On-Off Switch

 

Tube Complement

6BA6-RF amplifier

6BA6 - 1st IF amplifier

6AB4 - automatic frequency control

6AL5 = FM Ratio Detector

6U8 - oscillator , mixer

6AU6 - 2nd IF amplifier

12AU7 - Audio amplifier, cathode follower

6X4 - power rectifier

 

Specifications

Frequency Range:  88 to 108 MC

Hum Level: 70 dB (below 1,0 volt)

Maximum Audio Output:  5 Volts

Audio Distortion:  0,2% at 1 V output

Sensitivity:  5 mV for 20 dB quieting

Audio Frequency Response:  20 cps to 20,000 cps   ±0,5 dB

Audio Output Impedance:  500 Ω  cathode follower

Selectivity:  6 dB, down at 200 KC

Ratio Detector Peak to Peak Separation:  320 KC

Ratio Detector Response is Linear for 190 KC

Antenna Input:  300 Ω  Balanced; or built-in line cord antenna

Power Consumption:  50 watts, 117 Volts, 60 cycles

Overall Dimensions (W x H x D):  10-1/2" x 7-3/8" x 7-1/4", behind mounting panel

Shipping Weight:  10 pounds

 

Pioneer TX-5500II tuner

Truly High Fidelity Performance in Amand FM Stereo in An Advanced IC-Equipped Tuner in Attractive Price Range

Pioneer stays ahead in rich musical performance and interference-free reception when it comes to AM/FM stereo tuners in every price category. The TX-5500II is no exception, despite its attractively low price. The latest Pioneer advances in circuitry as perfected by our research and development teams are employed, often in microcircuit IC forms, to increase sensitivity and selectivity, reduce the Signal-to-Noise and Distortion irregularities, and improve overall tonal quality. An example is the PLL (Phase-Locked Loop) IC used in the FM stereo multiplex demodulator section. Another is the FET and 3-gang variable capacitor construction of the FM front end for more sensitivity. Still another is the use of the ceramic filter-plus-IC from of the FM IF section to provide pinpoint selectivity. All this pays off in better tonal quality, less distortion and more precise station selection in a functional, versatile tuner at a popular price. It's the TX-5500II from Pioneer, a good way to stay ahead in hi-fi.

 

FM Front End is stable but highly sensitive

You won't find better performance for the price. Pioneer boosts FM sensitivity to 10,7 dBf (1,9 µV) IHF. In the TX-5500II by using a low-noise FET and a 3-gang variable capacitor in the stable FM front end. Interference is rejected and the Signal-to-Noise Ratio is improved

Exclusive IF circuit uses ceramic filters and IC

Stability and limiter characteristics are improved while at the same time selectivity and capture ratio are boosted. This results from Pioneer's use of an exclusive high-performance IC and only those ceramic filters which can deliver the best phase linearity in the IF circuit.

Stereo separation is more stable with PLL

Outside influences such as changes in temperature and moisture can never affect the stereo FM multiplex demodulator because we use a Phase-Locked-Loop (PLL) circuit in IC form. The circuit has distinguished Automatic Gain Control (AGC) characteristics and stable detector output, factors which pay off in better stereo FM performance in strong signal areas.

Super-simple tuning system for more accuracy

The clean looks of the Pioneer TX-500II are functional, too. The FM-linear dial scale, a smooth-turning, flywheel balanced tuning mechanism and a combination signal-strength (FM/AM) and center-of-channel (FM only) meter make precision tuning simple.

A valuable investment in versatility

FM muting is automatically provided when you switch to FM Auto. The FM Mono positions lets you select more distant stations. And in the AM position, a high-integration AM circuit goes on line to bring you low-noise AM performance.

 

Specifications

FM Section

Circuitry:  1 FET; 1-stage RF amplifier; 3-gang variable capacitor, 5-stage limiter, PLL MPX

Usable Sensitivity

Mono :  10,7 dBf (1,9 µV)

50 dB Quieting Sensitivity

Mono :  14,0 dBf (2,8 µV)

Stereo :  38,0 dBf (44 µV)

Signal-to-Noise Ratio (st 65 dBf)

Mono :  72 dB

Stereo :  68 dB

Distortion (at 65 dBf)

100 Hz :  0,15% (Mono); 0,3% (Stereo)

1 kHz :  0,15% (Mono); 0,3% (Stereo)

10 kHz :  0,2% (Mono); 0,6% (Stereo)

Frequency Response

Mono :  30 - 10,000 Hz (+0,2 dB; -0,5 dB)

Stereo :  20 - 15,000 Hz (+0,2 dB; -1,0 dB)

Capture Ratio:  1,0 dB

Alternate Channel Selectivity:  50 dB

Spurious Response Ratio:  75 dB

Image Response Ratio:  60 dB

IF Response Ratio:  90 dB

AM Suppression Ratio:  50 dB

Muting Threshold: 10,0 dBf (1,7 µV)

Stereo Separation:  35 dB (1 kHz); 30 dB (30-15,000 Hz)

Subcarrier Product Ratio:  40 dB

SCA Rejection Ratio:  62 dB

Antenna Input:  300 Ω  (Balanced); 75 Ω  (Unbalanced)

AM Section

Circuitry:  1-stage RF amplifier, 2-gang variable capacitor

Sensitivity:

IHF (Ferrite Antenna) :  300 µV/m

IHF (External Antenna) :  15 µV

Selectivity:  35 dB

Signal-to-Noise Ratio:  50 dB

Image Response Ratio:  40 dB

IF Response Ratio:  70 dB

Antenna:  Built-in ferrite loopstick antenna

Audio Section

Output Level/Impedance

FM (100% Mod.) :  650 mV/3,5 k Ω

AM (30% Mod.) :  150 mV/5,1 k Ω

Semiconductors:  1 FET: 3 ICs: 6 Transistors; 6 Diodes

General

Power Supply:  120 V 60 Hz

Power Consumption:  11 watts

Dimensions (W x H x D):  380 x 124 x 269 mm (14-31/32" x 4-7/8" x 10-19/32")

Weight:  3,5 kg (7 lb 11 oz)

 

Sony ST-JX44 tuner

 

Remote Control Tuner

Sony products are inspired predictions of the future of technology. We are renowned throughout the world as the major innovator in home electronics. With our ST-JX44 tuner, we're proud to introduce the audio technology of tomorrow.

These two products ( TA-AX44 and ST-JX44) are the electronics of revolutionary audio system for the 80's, and beyond. Forget all your preconceived notion. If you're looking for an integrated amplifier, you should re-consider. If you're already picked out an amplifier and tuner, think again. Even if you're planning to buy a receiver, don't make any purchase yet - our new amplifier and tuner together fall roughly into the same price range as many equivalently-powered receivers. No matter what you had in mind, you owe it to yourself to examine the Sony ST-JX44 first.

 

Specifications

FM Tuner Section

Quieting Sensitivity

30 dB Mono :  10,3 dBf/1,8 µV

50 dB Mono :  16,1 dBf/3,5 µV

50 dB Stereo :  37,9 dBf/43 µV

Signal-to-Noise Ratio (at 85 dBf)

Mono :  82 dB

Stereo :  77 dB

Total Harmonic Distortion (1 kHz)

Mono :  0,08%

Stereo :  0,15%

Intermodulation Distortion

Mono :  0,08%

Stereo :  0,15%

Frequency Response :  30 Hz - 15 kHz +0.5 dB -2,0 dB

Stereo Separation (1 kHz):  50 dB

Alternate Channel Selectivity (400 kHz):  80 dB

Capture Ratio:  1,0 dB

AM Suppression:  60 dB

Image Rejection:  50 dB

Spurious Response:  70 dB

IF Response :  90 dB

RF Intermodulation (IHF):  60 dB

Muting/Tuning Threshold:  25,2 dBf

AM Tuner Section

Quieting Sensitivity

Built-in Antenna ;  46 dB/m

External Antenna :  30 µV

Signal-to-Noise Ratio  (at 50 mV/m):  55 dB

Total Harmonic Distortion (at 50 mV/m, 400 Hz):  0,3%

Selectivity (10 kHz):  38 dB

Image Rejection:  45 dB

General

Output Level/Impedance:  750 mV/4,7 K Ω

Power Supply:  120 V/60 Hz

Power Consumption:  8W max.

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

Weight:  2,9 kg (6 lb 7 oz)

 

Superscope T-210 tuner

AM/FM Stereo Tuner

At Superscope, we think that all music lovers should be able to afford the unrivalled sound fidelity of separate components. That's why we designed our new T-210 stereo tuner.so you can enjoy the clean sound and sophistication of a component tuner at a price that's within reach of practically every budget.

How can we do it? Easy, Superscope is the same company that brings you famous Sony tape recorders and Marantx stereo components.

The Superscope t-210 offers a full complement of features for drift-free AM/FM tuning accuracy. When matched with our A-235 or A-245 stereo amplifier and a pair of Superscope speakers, you have a compact component system ideal for apartments, dorms, mobile homes and other less than spacious listening areas.

But most important, the Superscope T-210 is built to last. It's assembled under such meticulous quality control procedures that we back the T-210 with one of the most comprehensive guarantees in the industry; three full years on parts and labor.

Superscope's T-210 styled in the tradition of the finest stereo components in the world.

Features:

Push button On/Off Switch - separate switch lets you pre-set other controls and not have to move them to turn on/off power

Signal-Strength Tuning Meter - allows precise tuning of AM, FM stations; display shows when station is tuned in for clearest, distortion-free reception

Selector Switch - choose AM, FM, FM/AFC, or FM stereo

Balanced Flywheel Tuning - massive balanced flywheel tuning permits easy, convenient station selection

Antenna Inputs - hook up far-ranging 300 Ω  FM antenna, and AM antenna

Unique Superscope Family Appearance and Design - clean, functional styling features an integral walnut-grained case. Durable finish resists marring or staining. Slip-proof pads on the base prevent marring of furniture. The white gold anodized front panel keeps its like-new appearance for years.

 

Specifications

FM Section

Usable Sensitivity (IHF):  5 µV

Signal-to-Noise Ratio:  60 dB

Harmonic Distortion:  1,0% at 1,000 Hz

Image Rejection:  better than 40 dB

Antenna Impedance:  300 Ω

Quieting :  40 dB (at 10 µV); 60 dB (at 100 µV)

Capture Ratio:  6 dB

AM Suppression:  35 dB

Stereo Separation:  better than 30 dB

AM Section

Usable Sensitivity (IHF):  30 µV

Antenna:  Built-in ferrite core antenna and external terminals

Power Requirements:  120 Volts, 50/60 Hz

Dimensions (W x H x D):  14-21/64" x 4-31/64" x 7-15/16"

Weight:  5,3 lbs

 

Superscope T-208 tuner

AM/FM Stereo Tuner

With precise selectivity and low distortion, the all-new Superscope T-208 Solid-State AM/FM Stereo Tuner makes a great-sounding addition to any stereo system. And despite its economy price tag, the Model T-208 offers a full complement of sophisticated features. Like Flywheel Tuning, High RF Sensitivity, Superb Stereo Separation, Signal Strength Tuning Meter, Stereo Indicator Light, Indoor FM Dipole Antenna, and more. For extra convenience, connect the T-208 to your home tape recorder system. Its compact size allows it to be used in a variety of applications. And the walnut-grained cabinet matches any room decor. Superscope's T-208 Solid-State AM/FM Stereo Tuner. There's no other tuner so easy on your pursestrings with such high performance.

 

Specifications

FM Section

Usable Sensitivity (IHF):  5 µV

Signal-to-Noise Ratio:  60 dB

Total Harmonic Distortion:  1,0% at 1,000 Hz

Image Rejection:  better than 40 dB

Antenna Impedance:  300 Ω

Quieting :  40 dB (at 10 µV); 60 dB (at 100 µV)

Capture Ratio:  6 dB

AM Suppression:  35 dB

Stereo Separation:  better than 30 dB

AM Section

Usable Sensitivity (IHF):  30 µV

Antenna:  Built-in ferrite core antenna and external terminals

Dimensions (W x H x D):  14-21/64" x 4-3164" x 7-15/16"

Weight:  5,3 lbs

 

Rotel RT-322 tuner

AM/FM Stereo Tuner

Here is another excellent tuner from Rotel's fine line of superb AM/FM stereo tuners. With reception performance unmatched at this cost range, it is definitely made to accompany almost all classes of amplifiers. FM sensitivity of 2,0 µV along with capture ratio of 1,5 dB assures outstanding performance not found in other similar tuners. RT-322 deserves to be heard, especially when complemented by our RA-311 stereo pre-main amplifier.

 

Special features:

Sensitive FET front-end for precise reception

Four-stage IF circuit for efficient selectivity

All advanced solid state electronics design

Handsomely trimmed aluminum extrusion panel

Convenient muting pushbutton switch to eliminate interstation noise

Effective Multiplex filter to suppress stereo noise

Illuminated dial scale and large easy-to-see tuning meter

Linear and wide FM dial scale for easy tuning

Wood cabinet included

 

Specifications

FM section

Sensitivity (IHF):  2,0 µV

Frequency Range:  88 - 108 MHz

Total Harmonic Distortion:  less than 0,5%

Signal-to-Noise Ratio:  65 dB

Capture Ratio:  1,5 dB

Selectivity:  50 dB

Stereo Separation:  40 dB at 1 kHz

Image Rejection:  60 dB

IF Rejection:  80 dB

Spurious Response Rejection:  80 dB

AM section

Sensitivity (IHF):  200 µV/m

Frequency Range:  535 - 1606 kHz

Image Rejection:  50 dB at 1 MHz

IF Rejection:  50 dB at 1 MHz

Signal-to-Noise Ratio:  50 dB

Selectivity:  30 dB

General

Dimensions (W x H x D):  14" x 7-1/2" x 4-1/2"

Weight:  4 kg (8,8 lbs)

 

Rotel RT-222 tuner

AM/FM Stereo Tuner

Here is RT-222, one of Rotel's cost-performance out-performer. The product designed for those who want quality at low cost. In no way we have compromised Rotel's tradition of excellence in quality to developed this fine tuner. RT-222 has all the basic facilities you need to enjoy clear and distortion free broadcasting but with a touch of professionalism. A smooth flywheel action, a large efficient tuning meter and a linear dial scale would assure simple yet precise operation for optimum listening pleasure.

 

Special features:

Precision front-end to pull in broadcast clearly

 all solid state electronics design

Handsomely trimmed aluminum extrusion panel

Large tuning knob with crisp flywheel action

Function selector for AM, FM or FM Stereo

Linear FM dial scale for easy tuning

Accurate signal strength tuning meter for visible tuning

Wood cabinet included

 

Specifications

FM section

Sensitivity (IHF):  4 µV

Frequency Range:  88 - 108 MHz

Total Harmonic Distortion:  0,5%

Signal-to-Noise Ratio:  63 dB

Capture Ratio:  5 dB

Selectivity:  20 dB

Stereo Separation:  35 dB at 1 kHz

Image Rejection:  40 dB

IF Rejection:  60 dB

Spurious Response Rejection:  60 dB

AM section

Sensitivity (IHF):  250 µV/m

Frequency Range:  535 - 1606 kHz

Image Rejection:  50 dB at 1 MHz

IF Rejection:  40 dB at 1 MHz

Signal-to-Noise Ratio:  50 dB

Selectivity:  30 dB

General

Dimensions (W x H x D):  13" x 6-1/2" x 4"

Weight:  3 kg (7 lbs)

 

QUAD FM3 tuner

Stereo Tuner

The purpose of VHF/FM broadcasting is to provide reception, within the service area of the transmitter (normally 50 to 100 miles) free of interference and capable of reproduction at very high quality. The Quad FM3 tuner will completely fulfil this purpose with any transmission which arrives at the aerial in a condition capable of full quality recovery.

Outside the service area of the transmitter it is the nature of VHF/FM for signal strength to fall rapidly and there will be a tendency to fading but the high sensitivity of the FM3 tuner enables it to receive such signals with two reservations. a, no tuner can improve the signal/noise ratio of the signal as it arrives at the aerial and B, the considerable bandwidth essential for low distortion reproduction means that a weak station can be resolved only if it is sufficiently separated (i.e. by at least 400 kHz) from any other more powerful signal.

In most areas the local VHF.FM services are normally receivable at reasonable signal levels. Between these stations on the tuning scale, among the background noise, there will usually be distant stations spilling over from other areas. Because the FM3 inter-station noise suppression circuit is adjustable the owner can decide where to set the suppression level between complete silence between one strong station and the next, on the one hand, and no suppression at all so as to rake in every scrap of signal (and noise) on the other. Also as the suppression system provides muting until the station is correctly tuned, not only is background "hash" suppressed but the unpleasant noises associated with tuning through the sidebands of the station are also avoided, and with strong stations it is possible to proceed from one perfectly tuned programme through silence to the next perfectly tuned programme.

Operating the FM3 is simple, the only control on the front of the FM3 tuner being the tuning knob (which is also used for setting the station markers) and no others are required. The noise suppression adjustment is a pre-set control at the rear of the tuner and all other controls, Volume, Stereo-Mono switching, Mono Hold, ON/Off, are provided by the associated Quad 33 control unit.

The positions on the scale of any five stations may be indicated by pre-set markers. These are positioned by pressing the tuning knob to engage its pointer with each marker in turn, tuning to the stations to be marked and releasing the knob. The markers then stay in position for future reference. The tuning indicator is the original Quad twin lamp system which provides for simple, positive and highly accurate tuning. The tuner is self-powered.

 

Circuit Detail

The RF and frequency changer stages use protected, dual gate MOS FET, and the IF stages and decoder section IC devices. Tuning is by means of a three gang capacitor and the stability is such that AFC is unnecessary. To achieve (and maintain) the desired bandwidth and shape the tuner employs ceramic filtering.

The audio output is via a 5 pin DIN plug on which pins 3 and 5 carry either mono or left and right stereo channels respectively, according to the incoming programme, in addition pin-1 carries a separate mono output, useful if an over-ride facility is required.

 

Specifications

Frequency Range:  88 - 108 MHz

Sensitivity:  30 dB sig; noise for 1 µV

Aerial Input:  75 Ω  coaxial, 300 Ω  balanced

Full Limiting:  from less than 2 µV

Image Rejection:  56 dB

IF Rejection:  80 dB

400 kHz Selectivity:  46 dB

Capture Ratio:  3 dB

IF Bandwidth:  less than -3 dB at ±120 kHz, better than -60 dB at ±200 kHz

Output at 38 kHz and Above:  -50 dB

Frequency Response:  20 Hz - 15 kHz ±1 dB

Channel Separation:  40 dB at 1 kHz

Distortion (at 1 kHz, and ±40 kHz deviation):  0,3%

Output:  100 mV per channel for 30% modulation

Source Impedance:  5 k Ω

Recommended Load Impedance:  better than 50 k Ω

Recommended Load Capacity:  less than 1000 pF

De-emphasis:  50 µ Sec or 75 µ Sec as required

Power Input:  100-125 or 200-250 V, 50/60 Hz;  6VA

Dimensions:

Width :  260 mm

Height :  92 mm (freestanding), 83 mm (panel only)

Depth :  165 mm (freestanding), 140 mm (behind cabinet panel when mounted) plus 64 mm for connectors

Weight:  2,7 kg