H.H. Scott PRO 100 loudspeakers

Scott speakers are designed and engineered for listeners who demand the ultimate in true sound reproduction. All Scott speakers are designed and individually tested for low distortion, flat frequency response and the highest possible efficiency. Their crossover networks are built with low loss capacitors, and coils with exceptionally close tolerances to give you the truest sound possible.

Unlike many other speakers, Scott speakers neither add nor subtract from the original sound. And unlike so many of today's "fad" speakers, they don't distort the original sound for special effect. Nor do they color the sound for an exaggerated response.

Scott speakers provide pure listening pleasure by accurately reproducing music with qualities equivalent to live performances, and with a degree of authenticity limited only by the quality of the record, tape or broadcast signal.

It is this uncommon ability to reproduce sound in a truly natural fashion that has eamed Scott speakers their outstanding reputation and critical acclaim. Listen for yourself. The true sound of Scott is pure pleasure. And true sound is built into every Scott speaker in every price range, from the Bookshelf Series to the distinguished Pro 100 .

 

Individual Dispersion Control and Frequency Response Switches

The Pro 100 provides a unique sound dispersion control that allows you to adjust the direction and amount of sound between the upward-firing and front-firing drivers. Two additional switches allow you to tailor the high end and midrange frequency response of the speaker to best match your room acoustics.

 

Unique bi-Directional Midrange and Tweeter Arrangement.

Pairs of midrange and tweeter drivers in two planes, one horizontal and one vertical offer the advantage of steering high-frequency distribution to most favourably complement speaker placement and individual listening taste. Unlike many other speaker systems, the Scott Pro 100 is not dependent on the reflecting surface of the listener's walls for its response  and provides a truly omnidirectional effect in any listening environment.

 

Specifications

Power Handling:  125 W

Impedance: 4 Ω

Frequency Response:  20 - 22,000 Hz

Crossover Frequency:  700 Hz, 3,500 Hz

Drivers

Low Frequency :  380 mm and 90 mm woofer

Mid Frequency :  115 mm and 23 mm midrange

High Frequency :  25 mm tweeter

Dimensions :  743 x 448 x 368 mm

Weight:  30 kg

 

H.H. Scott 386 receiver

 Featuring such sophisticated technological advances as electronic circuit protection and electronically regulated power supply, the new Scott 386 AM/FM stereo receiver is a new landmark in the field of audio engineering. High usable power and carefully considered design make the 386 the only choice for the experienced audiophile.

Scott guarantees at least this level of amplifier performance - Massive power transformer and Full Complementary Output circuitry give maximum undistorted power at all audible frequencies.

Instant-acting electronic overload protection - Unlike conventional thermal cutouts, Scott's new protective circuit releases the drive when too much current flows through the output transistors. A circuit-breaker will also trip under prolonged short circuit conditions at high power. There are no fuses to burn out.

Ultra-reliable space-age circuitry - Permanently aligned quartz crystal filter IF, FM amplifier, and four Integrated Circuits (including Perfectune logic module) are included in this small area.

AM reception virtually indistinguishable from FM - New Integrated Circuit AM front end features pre-tuned multi-pole filter for optimum AM fidelity.

Instant-information panel indicator lights - let you know at a glance whether you're receiving AM or FM, stereo or monaural broadcast, Scott Perfectune indicator tells when you're perfectly tuned for best reception.

New connection techniques eliminate solder joint failures - Wire-wrap terminal connections plus plug-in module construction result in the kind of reliability associated with aerospace applications.

Other features:

New illuminated dial results in increased visibility

New muting circuit eliminates noise between FM stations

Plug-in speaker connectors eliminate phasing problems

Silver-plated Field Effect Transistor front end receives more stations more clearly with less distortion

Integrated Circuit IF strip virtually eliminates all outside interference

Integrated Circuit preamplifier reduces distortion to inaudible levels

Full Complementary direct coupled all-silicon output circuitry provides effortless instantaneous power, with maximum reliability

Automatic stereo switching instantly switches itself to stereo operation

Specifications:

Power:  170 watts ±1 dB, IHF power spec. (at 0,8% T.H.D. both channel driven)

Dynamic Power:  67,5 watts/channel (at 4 Ω)

Continuous Power:  42 watts/channel (at 4 Ω);  35 watts/channel (at 8 Ω)

Frequency Response:  20 - 20,000 Hz ±1 dB

Selectivity:  40 dB

Hum and Noise (Phono):  -65 dB

Cross Modulation Rejection:  80 dB

Usable Sensitivity:  1,9 µV

Tuner Stereo Separation:  40 dB

FM IF Limiting Stages:  9

Capture Ratio:  2,5 dB

Signal-to-Noise Ratio:  65 dB

Input Phono Sensitivity:  3,6 mV

Dimensions (W x H x D):  17-1/2" x 5-1/2" x 15-3/4"

Weight:  20 lbs

H.H. Scott 450R receiver

Stereo receiver with DC Power Amp

the 350R features a DC configuration OCL power amplifier for clear, clean sound and low distortion. the four gang FM tuning section and all silicon dual gate MOSFETs assures an extra-wide, low noise signal and superior FM reception. The 350R's dual wide range power level meters calibrated in watts and dBW indicate amplifier output at a glance, the MPX filter cancels unwanted FM noise

Features include: a stereo beacon; FM center chanel and AM/FM signal strength tuning meters; left and right output power meters calibrated 0,001 to 100 watts and -30 dB to +20 dBW for 8 Ω loads; automatic dubbing from one tape to another; and an output hold-off that prevents power supply turn-on transients from being fed to the speakers.

There are inputs for magnetic phono, aux, and two tape. Outputs fro two speaker systems, two tape, and phones.

Controls are provided for tuning, volume, ganged bass, ganged treble, input selection /FM MPX filter, and speaker selection. There are switched for FM muting, high filter, loudness compensation, mono-stereo mode, copy 9dub tape 1 to tape 2), and tape monitor selection.

The fM antenna input is 75 and 300 ohms. A rod antenna and external connection are provided for AM. There are switched and unswitched AC outlets.

Performance FM Tuner Section

Full mute release was attained with 5,5 µV. The monophonic high fidelity sensitivity (60 dB quieting) measured 7 µV. The stereo high fidelity sensitivity (55 dB quieting) was 75 µV. Full mute release was attained with 12 µV. At standard test level the stereo frequency response measured ±3 dB from 70 to 14,000 Hz, rising to +3,5 dB at 15,000 Hz. The monophonic distortion measured 0,65% T.H.D.  The stereo distortion was 0,95% to 0,8% depending on the tuning adjustment (the indicators permit a relatively broad center-channel tuning range). The Signal-to-Noise ratio (mono) measured 69 dB. Stereo separation was 32 dB. Selectivity was good.

AM Tuner Section - background noise was relatively higher than average

Amplifier Section

The power output per channel at the clipping level with both channels driven 20 to 20,000 Hz into 8 ohms measured 88 watts RMS. The Frequency Response at 88 watts, 8 ohms measured +0/-1,5 dB from 20 to 20,000 Hz at a distortion no higher than 0,06% T.H.D. at any frequency.

The tone control range measured +9/-11 dB at 50 Hz ; ±11 dB at 10,000 Hz

The magnetic input hum and nooise measured -62 dB, stereo separation was into the noise level.

The LED output power indicators are instantaneous and track the peak program level. Calibration is approximate. The frequency response is "flat" from 20 to 20,000 Hz in terms of a single LED staying lit across the entire band of test frequencies.

Overall dimensions measure (W x H x D): 17-3/4" x 5-1/4" x 11-13/16"

Weight:  24,5 lbs

Scott PS-18 turntable

Semi-Automatic Turntable

The Scott PS-18 is a belt-driven two-speeds semi-automatic record player complete with factory installed pickup. Overall performance and soun quality is about average for the price, though the system is sensitive to external shock and vibration. The motor starts when the tonearm is moved off its rest. At the end of play the tonearm recycles to the rest and the motor turns off. The tonearm has a micro-adjust counterweight that serves as an 0 - 4 gram VTF (vertical Tracking Force) adjustment calibrated in 0,5 gram increments. There is a calibrated anti-skate. The pickup rated for 1,5 to 3 grams VTF, is factory installed in a fixed headshell. The stylus overhang gauge is a reference mark on the shell which isn't sufficiently accurate for user-installed pickups. The tonearm rest has a positivie user-applied lock that prevents accidental displacement of the tonearm from its rest, which might result in stylus damage. The PS-18 we tested was from the first production run at the factory. Subsequent units are to be delivered with a universal headshell mount to give the user more flexibility in cartridge selection and easier installation.

Controls:

Speed select

Reject

Tonearm lift

Anti-skate

Vertical Tracking Force

Turntable Performance

Line Voltage Immunity:  Total (90 to 140 volts)

Wow and Flutter:  0,07% (average);  0,1% (peak)

Tracking Force Calibration :  accurate to 0,25 grams

Output Cable Capacitance:  150 pF

Pickup performance:

Frequency response Limits:  +5/-1 dB

Frequency Response:  20 to 20,000 Hz

Channel Balance:  1 dB

Stereo Separation:

At 1,000 Hz :  20 dB

At 15,000 Hz :  15 dB

Dimensons (W x H x D):  17,25" x 5,5" x 13,75"

Weight: 15 pounds

H.H. Scott 390R

Scott's new 390R is perhaps the most complete receiver ever made. A professional control center for your entire sound system, the 390R delivers a full 120 watts per channel (min. RMS, 8 Ω 20-20,000 Hz no more than 0,03 T.H.D.). And it offers more options, features and flexibility than you 'll find on most separates.

Features:

DC configuration OCL power amplifier with fully complementary output stage.

Bimodal electrosensor relay protection and delay circuit with LED indication.

Differental current mirror loaded low noise input stage.

Centaer channel and signal strength tuning meters

18 LED Analog to Digital logarithmic power display indication calibrated in watts and dBW

3 stage IF amplifier incorporating 3 linear phase ceramic filters with differential limiter and quadrature detector

LED function indicators

Connections for 3 pair of speakers

2 phono input

5 gang FM tuning capacitor with twin stage dual gate MOS FET TRF amp

Multiplex filter

Specifications

FM Tuner Section

Tuning Range:  87,5 to 108 MHz

IHF Sensitivity:  9,8 dBf/ 1,7 µV

50 dB Quieting Sensitivity:

Mono :  15,6 dBf/3,3 µV

Stereo :  35,6 dBf/33 µV

Signal-to-Noise Ratio(at 65 dBf):

Mono :  80 dB

Stereo:  75 dB

Distortion (at 65 dBf):

Mono :  0,15

Stereo :  75 dB

Frequency Response:  25 Hz - 15 kHz (±2 dB)

Capture Ratio:  1,0 dB

Alternate Channel Selectivity:  80 dB

Image Rejection:  90 dB

Stereo Separation at 1 kHz:  50 dB

Spurious Response Rejection:  100 dB

Subcarrier rejection:  74 dB

IF Rejection (98 MHz):  100 dB

AM Section Tuner

Tuning Range:  515 to 1620 kHz

Usable Sensitivity (bar antenna):  150 µV/m

Signal-to-Noise Ratio:  55 dB

Selectivity ( 1Mhz):  500 dB

Image Rejection:  60 dB

Amplifier Section

Minimum Continuous RMS Output Power Per Channel (both channels driven into 8 Ω from 20 Hz to 20 kHz with no more than rated T.H.D. :  120 watts

Total Harmonic Distortion at Rated Output:  0,03%

Total Harmonic Distortion at 10 Watts, 20 Hz - 20 kHz :  0,015%

IMD at Rated Output:  0,03%

Input Sensitivity:

Phono 1 :  2,5 mV/5 mV

Phono 2 :  2,5 mV/5 mV

Others :  150 mV

Signal-to-Noise Ratio Weighted , Input Shorted

Phono :  90 dB (re: 10 mV RIAA 1 kHz)

Others :  95 dB

Frequency response:

Phono :  20 Hz - 20 kHz ±0,5 dB (RIAA)

Others at 1 watt :  20 Hz - 20 kHz ±0,5 dB

Phono Overload:  300/600 mV

Tone Control Range:

Bass :  ±10 dB at 100 Hz

Mid :  ±6 dB at 1 kHz

Treble :  ±10 dB at 10 kHz

Filters:

High :  8 kHz 12 dB /oct

Subsonic :  18 Hz  12 dB/oct

Loudness Compensation at -30 dB

=3,5 dB at 10 kHz

+7 dB at 100 Hz

Channel Separation:

Phono 1 kHz :  70 dB

Others 1 kHz :  75 dB

Crosstalk (1 kHz):  75 dB

Damping Factor (1 kHz)  8 Ω:  better than 100

General

Line Voltage and Frequency

US/canada :  117 V AC 60 Hz

Europe :  100 V, 117 V, 220 V, 240 V switchable 50/60 Hz

Power Consumption:

US/Canada :  320 watts

Europe ;  800 watts

Dimensions (W x H x D):  580 x 165 x 400 mm (6-1/2" x 22-7/8" x 15-3/4")

Weight:  22,3 kg (49,0 lbs)

H.H. Scott PS87A Turntable

PS87A Fully-Automatic Direct-Drive Turntable with Srobe

The Scott PS87A boasts an unmatched combination of the most wanted features. And, at a suprisingly affordable price. Automatic start, reject, return and shut-off plus single play or repeat functions provide the ultimate in convenience.

Featured strobe light with adjustable speed controls (±3%)

Viscous damped arm lifter with cueing lever

Direct readout stylus pressure and anti-skating controls

Record size selector

Spare handshell receptacle 12" finished diecast platter with strobe pattern

Low-capacitance phono cables and hinged dust cover

Unipivot suspension statically-balanced "S" shaped tonearm minimizes tracking error

Specifications:

Type:  Direct-drive full automatic

Motor:  electronically controlled DC motor

Turntable Platter:  12-inch (300 mm), aluminium diecast

Drive System:  Direct drive

Speedas :  33-1/3 and 45 rpm

Pitch Control Range:  ±3%

Wow and Flutter:  0,03%

Signal-to-Noise Ratio:  60 dB

Tonearm: 210 mm, static balanced, adjustable weight and anti-skating

Stylus pressure Range:  1 - 3 grams

Antiskating Range:  0 - 4 grams

Power Requirements:  AC 220V, 50 Hz; AC 120 V, 60 Hz

Power Consumption:  11 watts

Dimensions (W x H x D):  448 x 150 x 354 mm (17-2/3" x 5-3/4" x 13-5/6")

Weight [net]:  7,8 kg (17 lbs)

H.H. Scott PS77XV

Quartz-Lock Direct-Drive Semi-Automatic Turntable

The PS77XV offers absolute speed accuracy by incorporating a quartz synthesizer speed lock system to control a high torque 72 pole FG AC direct-drive motor.

Features:

Automatic reject, return, and shut-off functions.

Strobe light and speed controls for flexibility

Unipoint suspension statically-balanced "S" ahaped tone arm for accurate tracking

Quartz lock speed indicator LED

12" finished diecast platter with strobe pattern

Viscous damped are lifter with cueing lever

Low capacitance phono cables

Hinged dust cover

Specifications:

Type:  Direct-drive auto return system with strobe, speed adjust and cueing

Motor:  2-phase, 8-pole coreless quartz DC FG servo motor

Drive System:  Direct drive

speedS:  33-1/3 and 45 rpm

Pitch Control Range:  ±5%

Wow and Flutter:  0,035%

Signal-to-Noise Ratio:  60 dB

Tonearm: 214 mm, static balanced, adjustable weight and anti-skating

Turntable Platter:  12-inch (300 mm), aluminium diecast

Power Requirements:  AC 220V, 50 Hz; AC 120 V, 60 Hz

Power Consumption:  5 watts

Dimensions (W x H x D):  448 x 150 x 354 mm (17-2/3" x 5-3/4" x 13-5/6")

Weight [net/packing]:  8 kg (17,6 lbs)/ 9,5 kg (20,9 lbs)

H.H. Scott T-527

Specifications

FM Tuner Section

Tuning Range:  87,5 to 108 MHz

Usable Sensitivity [Mono]:  7 dBf/2,2 µV

Sensitivity for 50 dB S/N Ratio [Mono]:  12 dBf/4,5 µV

Signal-to-Noise Ratio (at 65 dBf)

Mono :  65 dB

Stereo :  60 dB

Frequency Response:  10 to 15,000hz

Distortion (at 65 dBf)

Mono :  0,25%

Stereo :  0,5%

Capture Ratio:  1 dB

Alternate Channel Selectivity:  60 dB

Image Rejection Ratio:  80 dB

Stereo Separtion 91 kHz):  40 dB

Spurious response Rejection Ratio:  90 dB

AM Suppression Ratio:  60 dB

Streo Threshold (preset):  5 to 10 µV

Muting Threshold (Switchable on-off):  5 to 10 µV

 AM Tuner Section

Tuning Range:  525 to 1605 kHz

Usable Sensitivity:  150 µV/m

Signal-to-Noise ratio:  45 dB

Image Rejection:  60 dB

IF Rejection:  60 dB

General

Power Requirements: 

Europa :  220/240 V, 50/60 Hz

USA, Canada :  110/120 V, 50/60 Hz

Power Consumption:  18 watts

Dimensions (W x H x D):  420 x 140 x 290 mm

Weight:  7 kg

H.H. Scott 3300

 Exclusive Scott perfectune.

The world's most accurate and reliable tuning device, obsoletes center-tuning meters by employing a digital computer to automatically flash an indicator panel light when best tuned for maximum reception (absolute center channel and lowest distortion).

True AM high fidelity

After years of costly experimentation, Scott engineers discovered the answer underlying true Am high-fidelity. Distortion so low that Scott AM is virtually undistinguishable from FM. Employing latest FET and Integrated Circuit techniques in the 3300, they throughly eliminated interference and drift. Weak stations now assume a new clarity, strong stations become totally distortion-free, and a new FET mixer improves cross modulation rejection and cuts adjacent stationinterference.

Solderless wire connections

A scott exclusive, "tension wrap" each wire around a terminal under tremendous torsion. Consequently, the 3300 possesses a dependability akin to aerospace and computer applications because the problems of cold or unsoldered connections are drasticly reduced.

 The world's first high fidelity IC Multiplex section (no larger overall than a cigarette filter) incorporates 31 transistors, 10 diodes and 29 resistors to ensure superior reliability and superior FM streo separation than conventional printed circuit construction.

Scott's quartz crystal lattice filter

In the tuner IF section never requires realignment or adjustment. Never … regardless of age or operating temperature. This revolutionary feature, never found before in receivers in this price range, also yields the extra divident of very low distortion and incredible selectivity.

F/C/O Circuity

Provides close to distortion-free listening, even at low volume levels. The 3300 incorporates Full Complementary Output Transistors to achieve perfect undistorted sound, over a wide power bandwidth at both 8 and 4 ohms … a vital factor when connecting extra speakers.

Specifications

Amplifier Section

Total Power:  130 watts at 4 Ω ±1 dB

IHF Music Power:  100 watts at 8 Ω

Continuous Power Output:

40 / 40 watts at 4 Ω

33 / 33 watts at 8 Ω

Harmonic Distortion:  0,8% at rated output

IHF Power Bandwidth:  20 Hz - 30 kHz

Input Sensitivity

Phono : 3,0 mV

Extra :  0,50 V

Tape :  0,50 V

Hum and Noise (below rated output):

Phono :  60 dB

Extra :  70 dB

Tape In :  70 dB

FM Multiplex Tuner Section

Tuning Range:  88 - 108 MHz

Sensitivity:  1,8 µV

Signal-to-Noise Ratio:  65 dB below 100% mod.

Total Harmonic Distortion:  0,6%

Frequency Response (FCC limit):   50 - 15,000 Hz, ±1 dB

Capture Ratio:  2,5 dB

Dial Calibrtion Accuracy:  0,5% of station freq.

AM Suppression:  55 dB

Separation at 400 Hz:  35 dB

Cross Modulation Rejection:  90 dB

FM Muting Switching Level:  3 - 30 µV (adjustable)

AM Tuner Section

Tuning Range:  535 - 1620 kHz

Bandwidth:  -3 dB = 8 kHz;  -6 dB = 10 kHz

Selectivity:  32 dB

THD (60% modulation):  2,0%

Usable Sensitivity:  100 µV/m at 600 kHz

Hum and Noise:  40 dB below 100% mod.

Spurious Response Rejection:  better than 60 dB

IF Rejection:  better than 33 dB

Image Rejection:  better than 48 dB

H. H. Scott 255S naked

Specifications

Power Output

Total Music Power (IHF): 90 watts at 8 ohms

Continuous Power (RMS):

30 watts at 8 ohms per channel (both channels operating)

40 watts at 4 ohms per channel (both channels operating)

Total Harmonic Distortion: less than 0,5% at rated output

Intermodulation Distortion: less than 0,5% at rated output

Frequency Response: 20 - 25,000 Hz ±1 dB

Power bandwidth (IHF): 15 Hz to 35 kHz

Input Sensitivity and Impedance:

Phono1, Phono2: 2,5 mV 100/50 kΩ

Tuner: 120 mV 25 kΩ

Aux1, Aux2: 120 mV 25 kΩ

Tape IN: 120 mV 25 kΩ

Main Amp. Input: 850 mV 35 kΩ

Signal-to-noise Ratio:

Phono1, Phono2: 65 dB

Tuner, Tape IN: 75 dB

Aux1, Aux2: 75 dB

Damping Factor: 30 at 8 Ω

Output Impedance: 4 - 16 Ω (8 Ω Nominal)

Tone Controls:

High Filter: 9 dB at 10 kHz

Low Filter: 9 db at 50 Hz

Muting: 20 dB at 1 kHz

Bass Control: +12 dB to -10 dB at 50 Hz

Treble Control: +12 dB to -15 dB at 10 kHz

Phono Overload: over 100 mV

Dimensions (W x H x D): 413 x 124 x 222 mm

Weight: 6 kg net.

Photo gallery

H. H. Scott 299 (1958 - 1966)

The H. H. Scott 299 is the ultimate in complete stereo amplifiers. Introduced just a year ago, it is now in use in more fine music systems than any other stereo amplifier in the world. it has won praise from many leading high fidelity experts. It eas "check-rated" and recommended by both leading consumer testing organizations. The 299 was selected for display at world expositions like the Moscow fair.

The proven 40 watt stereo amplifier will drive even the most inefficient speaker systems because its special subsonic filter directs all power into the audible music range and its output stage is of extremely conservative design. This fine amplifier gives you a unique combination of exclusive H. H. Scott features, advanced engineering and handsome apperance. If you are planning a truly fine music system the H. H. Scott model 299 complete amplifier is the ideal choice.

299-A (1958 -1960)

Stereo 40-watt Integrated Amplifier 17-wpc (RMS)

Scott's first "Stereomaster" Integrated Amp

"Christmas Tree" tri-function neon indicators, unique to 299-series

Bias control common to both channels

11 tubes:

(4) 12AX7

(2) 6BL8 (floating paraphase inverter w/AC balance pots)

(4) 7189

(1) 5AR4

299-B (1960-1961)

Stereo 50-watt Integrated Amplifier 21-wpc (RMS)

Larger transformers, changed phase splitters

Minor styling changes to knobs, indicators, logo/lettering, double-H, logo, replaced oval logo.

11 tubes:

(4) 12AX7

(2)6U8/6GH8 (floating paraphase inverter w/AC balance pots)

(4) 7189

(1) 5AR4

299-C (1961-1964)

Stereo 72-watt Integrated Amplifier 31-wpc (RMS) or 28-wpc (RMS) smaller transformer versions

Major upgrade for 299-series adapted from the older LK-72 (kit) 7591-design

Added Front-panel Headphone Jack,

More powerful final section center channel volume control some late "C" versions had 233 circuitry and smaller TRA-8-5-4 transformers

11 tubes:

(4) 12AX7

(2) 6U8 or 7199 (Split-load phase inverter)

(4) 7591

(1) 5AR4

299-D (1964-1966)

Stereo 80-watt Integrated Amplifier 34-wpc (RMS)

See 299C above See LK-72-B (kit)

S/N 249780 & up: used 233's output xformers: TRA-8-5-4

Updated, Extruded front panel styling

Minor service-related improvements

used wide "C" case/chassis

11 tubes:

(4) 12AX7

(2) 6U8 or 7199 (Split-load phase inverter)

(4) 7591

(1) 5AR4

Specifications

Frequency response: 20 - 30,000 Hz (with tone controls set flat)

Total Harmonic Distortion: 0,8% at full power output

IM Distortion: 0,3%

Noise and Hum:

Noise equivalent to 10 microvolts on low level input;

Hum better than 80 dB below full power output

Sensitivity Max.: 3 milivolts for rated output (will accomodate all low output pickups)

Outputs: Stereo Tape Recorder; 4, 8 and 16 ohm speaker output for each channel

Dimensions: 15½" x 5" x 12½" (W x H x D)

H.H. Scott 710-A (1955-60)

 Radically new mechanical design virtually eliminates acoustic feedback.

Convenient pushbutton selection of 33-1/3, 45 and 78 rpm speeds.

Individual vernier speed controls to permit matching the pitch of accompanying musical instruments.

Built-in expanded scale optical stroboscope for exact speed control, while record is actually being played.

Torsional and dual stage mechanical filtering reduce rumble to 60 dB below the recording level,

wow and flutter to less than 0,1% all far below audibility.

The 710-A is actually far more than just a high-performance turntable. It is an integrated system incorporating complete facilities for pickup arm mounting with scientifically designed vibration isolation. At its moderate price it represents an outstanding value featuring unique beauty, operating convenience, simplicity of installation and unsurpassed performance.

The radically new mechanical design of this professional turntable reduces annoying disturbances such as motor rumble, "wow" and flutter to limits so low as to be inaudible and virtually unmeasurable. This is possible through the use of unique dual-stage mechanical vibration filtering and high compliance torsional filtering. A significat design contribution is the rigid connection of the integral pickup-arm mounting board to the turntable bearings through a heavy aluminum casting. This prevents acoustic feedback and other undesirable results of vibration differences between pickup arm and turntable.

Real operating convenience is provided by pushbutton selection of 33-1/3, 45 and 78 rpm speeds. Built-in expanded scale optical stroboscope with electronic peak-pulsing for extreme clarity insures precision speed adjustment even while a record is being played. Each speed is separately adjustable by ±5% to allow matching the pitch ofanaccompanying musical instrument.

The turntable board in gleaming stainless steel, can be mounted directly to a cabinet without additional vibration isolation, providing simple and convenient installation. The 710-A is a beautifully styled unit, available either with or without the handsome modern base.

VIEW OF TURNTABLE MECHANISM

1. Expanded scale optical stroboscope, with electronic peak pulsing for greatest clarity, is visible even while the record is playing for exact speed control at all times.
2. Precision helical drive gears, of hardened steel and nylon, for smooth silent flow of power to turntable. gears housed in an oil-filled transmission for noiseless trouble-free operation. Special clutch permits cueing turntable.
3. High-compliance torsional filtering reduces annoying speed variations, such as wow and flutter, to less than 0,1% far below audibility.
4. Dual-stage mechanical filtering between motor and turntable reduces motor rumble to more than 60 dB below recording level, an outstanding engineering accomplishment.
5. Integral pickup-arm mounting board, accommodating all leading pickup-arms, is rigidly connected to turntable bearings by a heavy aluminum casting. This eliminates acoustic feedback and other undesirable vibration differences between pickup-arm and turntable.
6. Vernier speed drive with special long-life neoprene idlers permits separate adjustments of 33-1/3, 45 and 78 rpm speeds by ±5% to match the pitch of accompanying musical instruments. Convenient push button selection of each speed and off position.
7. heavy-duty high quality induction motor designed specially for this turntable with dynamically balanced rotor and extremelly low external hum field.

TECHNICAL SPECIFICATIONS

MOTOR RUMBLE:

Reduced to more 60 dB below the recording level, far below audibility.

WOW AND FLUTTER:

decreased to less than 0,1% of rated speed.

SPEED SELECTION:

Push button selection of 33⅓, 45 and 78 rpm speeds.

VERNIER SPEED CONTROLS:

Each speed has its own vernier adjustment. A variation of up to ±5% may be made in the nominal speed to permit matching the pitch of accompanying musical instrument.

STROBOSCOPE:

Built-in expanded scale stroboscope permits precise speed adjustment even while record is being played. Special electronic peak-pulsing circuit insures superior stroboscope illumintion and clarity.

PICKUP ARM MOUNTING BOARD:

Mounting board made of hand-rubbed mahogany is included with the turntable and is part of the special mechanical design. The board is mounted on the same cast frame as teh turntable bearings thus minimizing acoustic feedback and other undesired effects of differential vibration between pickup and record. Mounting board is easily removed or replaced and may be easily drilled for any loading pickup arm.

MECHANICAL FILTERING:

High compliance torsional filtering and two stages of damped mechanical filtering reduce wow , flutter and rumble to limits far below audibility.

TURNTABLE:

Machined from a single five pound aluminum casting. Weight concentrated at the rim for maximum uniformity of speed. Aluminum construction eliminates possibility of magnetic pull on reluctance cartridges.

PRECISION HELICAL DRIVE GEARS:

Smooth, silent flow of power to the turntable is assured by the hardened steel worm and nylon drive gears. Gears housed in an oil-filled transmission for noiseless trouble-free operation.

OTHER CONSTRUCTION FEATURES:

Motor board covered in gleaming machine-finished stainless steel; special precision honed sintered bronze bearings used; long life neoprene idlers; all idlers disconnected with Off button depressed.

SLIP CLUTCH:

Special clutch allows turntable to be cued. Clutch also prevents mechanical shock to gear drive when unit is turned Off.

MOTOR:

heavy duty induction motor, with dynamically balanced rotor and extremaly low external hum field, designed specially for this turntable. This special motor is insensitive to the instantaneous short-term variations in line frequency which occur frequently, and it is also insensitive to changes in line voltage.

ACCESSORY BASE:

A handsome, hand-rubbed mahogany base, precut for easy installetion is available.

CABINET INSTALLATION:

The unique mechanical design makes it possible to mount the turntable board firmly to any cabinet. No special mounting springs or vibration isolators are required. The motor board is simply rigidly fastened to the cabinet. Mounting templates are supplied with the turntable.

DIMENSIONS:

Board dimensions, including pickup armmounting board: 16⅞ x 14½. Depth from top of spindle to bottom of mechanism: 7⅛ inches. Depth below mounting board: 4¼ inches.

POWER:

55 wtts, 105 125 volts, 60 cycle a.c.

Special model 710-A1 available for 50 cycle operation.