Professional Transcription Turntables
--------- This cut-away illustration of a Gates turntable shows the fine
machining and workmanship in the equipment. Oilite bearings are used at all
bearing points, including the large center spindle bearing. Speed shift linkages
are through mono-ball self-aligning bearings for smooth, silent, trouble-free
operation. There are no belts, planetary drives or gear trains to wear.
Shift speeds to 78, 45 or 33 1/3 rpm by simply moving shift lever to the desired index point. Then touch the mercury-type switch to either start or stop. Complete one-hand operation leaves the other hand free for cueing or control boards.
PRECISION ENGINEERED
Recent advances in recording techniques, as well as stereo requirements, now place stronger demands on today's reproducing equipment. To meet these improved performance standards, Gates offers two outstanding turntables (one 16 inch model, one 12-inch model), designed to reduce rumble to an all-time low, without the sacrifice of quick cue.
The heart of Gates turntable design is a drive hub, which is part of the turntable platter-and about one-half the radius of a 45 rpm disc. A single idler wheel for all speeds is floating and self-aligning-and a 600 rpm hysteresis synchronous mo tor with 3-speed pulley, engages the idler wheel to the inner hub.
The combination of lower motor speed (one-third that of other models) and a drive located inside the playing surface, results in remarkably low rumble.
Speed change is exact and functionally correct. All three speeds shift across a single indexed plate. A mercury-type start/stop switch illuminates when on. The smooth felt platter surface offers slip-cueing if desired. A captive pop-up spindle is provided for 45 rpm discs.
Every Gates turntable is totally hand-assembled, micrometer checked under rigid quality-control standards and then individually tested in our laboratory for wow, flutter, and speed consistency.
As Gates turntables are precision machined devices they are not the lowest in initial cost, but are far less expensive on the basis of per-hour cost.
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DRIVE DESIGN PRINCIPLE
OLD METHOD
Rim drive turntables, as the word implies, drive against the outer rim of the platter. Vibration, commonly called rumble, is returned to the center spindle, or bearing, across the entire playing surface of the platter.
This type of drive usually requires an 1800 rpm motor for proper speed ratios. The greater the motor speed, the greater the vibration. Also, higher motor speeds raise the audio frequency of this vibration or rumble.
GATES METHOD
In both the 12- and 16-inch Gates turntables, the drive is against a solid inner hub, away from the us able playing surface of the platter.
Likewise, any minute vibration or rumble is pushing against the center bearing instead of pulling away as in outer rim drive turntables. With this exclusive drive system, a 600 rpm hysteresis synchronous motor is used. Lower motor speed assures lower vibration or rumble. The lower speed substantially drops the audio frequency of this much-lower motor vibration so that nearly all of the rumble is in the sub-audible spectrum.
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Professional Transcription Turntables-16-Inch
MODEL CB-500
Gates CB-500 is the most widely used 16-inch turntable in the broadcasting industry. Designed for continuous 24-hour commercial service, this turntable is ruggedly constructed to meet the strain of any control room operation, while maintaining its excellent quality of performance.
Time proven features include heavy machined aluminum platter, rubber-shock-mounted cast aluminum chassis, Oilite hub bearing, self-centering neoprene idler wheel, monoball self aligning speed shift bearings, and a functional speed selector mechanism. (Order pickup arm separately.)
SPECIFICATIONS
CHASSIS SIZE: 21 1/4" x 21 1/4" x
MOTOR HANG BELOW BOTTOM OF CHASSIS: 4 7/8".
CONSTRUCTION: Both platter and base of machined aluminum.
FINISH: Beige-gray with escutcheon in black and turntable platter cover in heavy gray felt.
PLATTER SIZE: 17".
STROBOSCOPE: Built-in on platter for all three speeds.
CENTER SPINDLE: Spring-locking type, snaps up for 45 rpm hub, locks down for smaller-spindle records.
CENTER BEARING: 1" diameter hardened steel, rotates in Oilite bearing.
MOTOR: Hysteresis synchronous, single phase, 600 rpm, with 40°C temperature rise.
CUEING: At 33 1/3 rpm, 1/2 turn. At 45 rpm, 1 / 2 turn.
At 78 rpm, 1 3 / 4 turn.
NOISE OR RUMBLE: At 33 1/3 rpm, rated -45 dB. At 45 rpm, rated -40 dB
At 78 rpm, rated -35 dB.
WOW: Rated 0.1 % at 33 1/3 rpm, capable .08 %.
FLUTTER: Rated 0.07 % at 33 1 / 2 rpm, capable .05 %.
MOTOR START: Rocker-type illuminated mercury switch.
IDLER WHEEL: Special shear action neoprene, self-aligning.
SPEED CHANGE: To 33 1/3, 45, or 78 rpm by single indexed lever control.
POWER: 117 volts, 60 Hz, 35 watts. (50 Hz available, see below.)
WEIGHT: Net: 34 lbs. Packed: domestic, 45 lbs.; export, 70 lbs. Cubage: 6 cubic feet.
ORDERING INFORMATION
CB-500 16-inch transcription turntable, chassis only, for 60 Hz 994-5739-003 $325
CB-500A 16-inch transcription turntable, chassis only, for 50 Hz 994-5739-004
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Professional Transcription Turntables-12-Inch
MODEL CB-77
Gates CB-77 is a professional 12-inch transcription turntable, with the same unique design principles as its companion 16 inch model. In the 12-inch CB-77 chassis will be found the same inner hub drive system, the same convenient speed change system, the same illuminated rocker arm on-off switch, etc. The only difference is the reduced size, affording broad casters a more compact turntable arrangement for today's busy control room, were space is at a premium.
The chassis is ready for you to attach the pickup arm of your choice (order separately), and is designed for 33 1/3 , 45 and 78 rpm speeds.
SPECIFICATIONS
CHASSIS SIZE: 16" x 16" x 1 5/16. Motor hang below bottom of chassis: 5 3/4".
CONSTRUCTION: Platter and base of machined aluminum.
FINISH: Beige-gray with escutcheon in black and turntable platter cover in heavy gray felt.
PLATTER SIZE: 13 3 /8".
STROBOSCOPE: Built-in for all 3 speeds.
CENTER BEARING: 1" diameter hardened steel, rotates in Oilite bearing.
CENTER SPINDLE: Spring-locking type snaps up for 45 rpm, locks down for smaller spindle records.
MOTOR: Hysteresis synchronous, single phase, 600 rpm, with 40°C tempera ture rise.
CUEING: At 33 1/2 rpm, 1 / 6 turn. At 45 rpm, 1/4 turn. At 78 rpm, 1 turn.
NOISE OR RUMBLE: At 33 1/2 rpm, rated -45 dB. At 45 rpm, rated - 40 dB. At 78 rpm, rated - 35 dB. (Meets or exceeds NAB specifications for stereophonic reproduction.)
WOW: 0.1 % maximum, capable .08 %.
FLUTTER: .07 % maximum, capable .05 %.
MOTOR START: Rocker-type illuminated mercury switch.
IDLER WHEEL: Special shear action neoprene, self-aligning.
SPEED CHANGE: To 33 1/3, 45 or 78 rpm by single indexed lever control.
POWER: 117 volt, 60 Hz, 35 watts. (50 Hz model available, see below.)
WEIGHT: Net: 30 lbs. Packed: domestic, 40 lbs.; export, 65 lbs. Cubage: 3.6 cubic feet.
ORDERING INFORMATION
CB-77 12-inch transcription turntable, chassis only, 60 Hz 994-5798-0051 $199 CB-77A 12-inch transcription turntable, chassis only, 50 Hz 994-5798-006
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Turntable System Components
16-INCH SYSTEM COMPONENTS
To make up a 16-inch turntable system, the following components are recommended:
MONOPHONIC SYSTEM
CB-500 turntable, 60 Hz (50 Hz available) 994-5739-003 Gray 208-S 16" viscous damped tone arm 723-0094 6 / or Gray 306 16" Micro-Trak tone arm 723-026 01 '1 -
Shure M-44-7 stereo dynetic cartridge w/.0007" diamond stylus 723-0236 M-6244 equalized turntable preamplifier, transistorized 994-6244 NOTE: If Gray 208-SG tone arm is desired (723-0153), a General Electric VR-Il turn-around cartridge should be used (723-0017). STEREOPHONIC SYSTEM CB-500 turntable, 60 Hz (50 Hz available) 994-5739-003 Gray 208-S 16" viscous damped tone arm 723-0099 or Gray 306 16" Micro-Trak tone arm 723-0269 Shure M-44-7 stereo dynetic cartridge w/.0007" diamond stylus 723-0236 M-6442 equalized turntable preamplifier, transistorized, stereophonic 994-6442 NOTE: To order cabinet, see below.
12-INCH SYSTEM COMPONENTS
The following components are recommended to make up your 12-inch turntable system.
MONOPHONIC SYSTEM
CB-77 turntable, 60 Hz (50 Hz available) 994-5798-005i, .--, Gray 206-S 12" tone arm 723-0259 or ct--p,S 6 . Gray 303 12" Micro-Trak tone arm 723-0268
Shure M-44-7 stereo dynetic cartridge w/.0007" diamond stylus 723-0236 15
M-6244 equalized turntable preamplifier, transistorized 994-6244
NOTE: If Gray 206-SG 12" tone arm is desired (catalog number 723-0250), order
General Electric VR-I1 turn-around cartridge (catalog number 723-0017). STEREOPHONIC SYSTEM CB-77 turntable, 60 Hz (50 Hz available) 994-5798-005 Gray 206-5 12-inch tone arm 723-0259 or:
Gray 303 12" Micro-Trak tone arm .723-0268
Shure M-44-7 stereo dynetic cartridge w/.0007" diamond stylus 723-0236 M-6442 equalized turntable preamplifier, transistorized, stereophonic 994-6442
NOTE: To order cabinet, see below.
DUAL TURNTABLE CABINET
Beautifully styled, and dimensioned to accommodate either 12- or 16-inch Gates turntables.
Dual turntable cabinet 994-6449
SINGLE TURNTABLE CABINET
Fits any decor.
Accommodates either 12-inch or 16-inch Gates turntable.
Single turntable cabinet 994-6448
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Transcription Tone Arms and Pickups
12" AND 16" MICRO-TRAK TONE ARMS
Especially designed for stereo, this durable arm will track distortion-free at micro-pressures of 1/10 gram. A new material never before used in a tone arm, wood impregnated with epoxy resins, was selected for this arm to achieve the extremely low tracking force and very low resonance characteristics. Sapphire bearings floating in a unique elastomer ring isolate the tone arm from its mounting and produce a tone arm with virtually no vertical friction.
Available for 12" and 16" turntables, this Gray arm will accept any broadcast type stereo cartridge.
Gray 303 Micro-Trak 12" tone arm 723-0268 Gray 306 Micro-Trak 16" tone arm 723-0269
MONOPHONIC PICKUP CARTRIDGES
Proven, rugged broadcast transcription cartridges for mono phonic recordings. Response 20 to 20,000 Hz with output of 12 mV at 10 CM per second at 1000 Hz.
Tracking force 4 grams. Replaceable clip-in styli for a wide range of recordings. Use high impedance type with M-6244 equalized pre amplifier, low impedance with Gray 602-C passive equalizer.
GE TYPE VR-II PICKUP
High Impedance Cartridge with single stylus 4G-040 Sapphire, 0.0025" 723-0013 4G-041 Sapphire, 0.001" 723-0014 4G-061 Diamond, 0.001" 723-0016 4G-063
Diamond, 0.0025" 723-0015 High Impedance Triple Play with Styli (turnaround cartridge) 4G-050 Sapphire 0.001"; sapphire 0.0025" 723-0017 4G-052 Diamond 0.001"; sapphire 0.0025" 723-0018 4G-053
Diamond 0.001"; diamond 0.0025" 723-0019
Low Impedance Cartridges with Single Stylus 4GS-07D
Diamond .0007" 723-0272 4GS-02D
Diamond 0.0025" 723-0020 4GS-075
Sapphire .0007" 723-0273 4GS-025
Sapphire 0.0025" 723-0026
Low Impedance with Triple Play Stylus 4GD-07DO2D
Dual diamond .0007" and 0.0025" 723-0290 4GD-075025 dual sapphire .0007" and 0.0025"
723-0291
Clip-in Styli for VR-II Cartridges
4G-02S
Sapphire 0.0025" 723-0045 4G-01D
Diamond 0.001" 723-0041 4G-02D
Diamond 0.0025" 723-0042 RPJ-01D
Diamond 0.001" 723-0035 RPJ-02D
Diamond 0.0025" 723-0036 RPJ-01S
Sapphire 0.001" 723-0038 RPJ-025
Sapphire 0.0025" 723-0039
Single Tip Replacement Styli for RPX-040, 041, 061, 063 RPJ-005
Sapphire 0.001" 723-0033 RPJ-006
Sapphire 0.0025" 723-0034 RPJ-004
Diamond 0.001" 723-0032 RPJ-002
Diamond 0.0025"__ 723-0030
12" AND 16" TONE ARMS
Models 206-S and 208-S viscous damped tone arms come with slide and modular weights for mounting single play stereo or monophonic cartridges. Designed specifically for the GE turn around cartridges, the models 206-SG and 208-SG have a slot cut out in the front of the arm to clear the stem of the GE cartridge, and are specially balanced for this cartridge.
Accessory weights are also available.
Gray 206-S, 12" viscous damped tone arm 723-0259 Gray 206-SG, 12" viscous damped tone arm for turnaround cartridge 723-0250 Gray 208-S, 16" viscous damped tone arm 723-0099 Gray 208-SG, 16" viscous damped tone arm for turnaround cartridge 723-0153
STEREOPHONIC PICKUP CARTRIDGE
Model M44-7 stereo dynetic cartridge is recommended for faithful reproduction of stereophonic recordings with the M 6442 stereo preamplifier. It offers superior stereo separation, smoother response, and is designed to complement the 15-effective cutting angle now being used on stereo recordings.
The easily changed styli may be interchanged for various types of recordings.
SPECIFICATIONS FREQUENCY RESPONSE: 20 to 20,000 Hz, CHANNEL SEPARATION: More than 25 dB at 1000 Hz.
OUTPUT: 9 millivolts per channel at 1000 Hz at 5 cm/sec.
LOAD IMPEDANCE: 47,000 ohms per channel.
TRACKING: 1.5 to 3 grams.
STYLUS: Features "no scratch" retractable design.
INDUCTANCE: 680 millihenries.
D. C. RESISTANCE: 650 ohms.
MOUNTING: Standard 1,2 " mounting center.
WEIGHT: 7 grams net.
ORDERING INFORMATION
Shure M44-7 stereo Dynetic Cartridge with 0.0007" diamond stylus 723-0236
Replacement Stylus N-44-7 0.0007" diamond 723-0237
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Transistorized Turntable Preamplifiers
MONOPHONIC
Single-channel monophonic preamplifier designed for use in broadcasting, recording, and general sound requirements where low distortion and exacting frequency response characteristics are demanded. Featuring self-contained power supply and transformer output, the preamplifier includes two position equalizer with escutcheon and knob for RIAA/NAB or roll off equalization. The input impedance of 47,000 ohms makes the M-6244 compatible with virtually all magnetic cartridges (including stereo).
SPECIFICATIONS
INPUT: 47,000 ohms.
OUTPUT: Adjustable from -22 dBm to -12 dBm with 12 mV input.
RESPONSE: Within +/- -1 dB of RIAA/NAB standard curve.
Additional high frequency, roll-off filter position provided.
DISTORTION: Less than 0.5 % at normal levels ( - 22 dBm to -12 dBm out put). Less than 1.0 % at 10 dB overload (above 12 mV input).
NOISE: 68 dB or lower, below -12 darn output (with 12 mV input).
LOAD IMPEDANCE: 600 ohms or 150 ohms, balanced or unbalanced.
MAXIMUM OPERATING AMBIENT TEMPERATURE: +60°C (+140°F).
POWER: 115 volts, 50/60 Hz, 1 watt.
MOUNTING: Two holes for mounting to Gates turntable or inside of any cabinet. May be mounted in any position.
SIZE: 2 9 46" wide, 8 3/8" long, 2 7/8" high.
WEIGHT AND CUBAGE: Net weight, 1 1/4 lbs.
Packed weight, 8 lbs.
Cubage, 1 cubic foot.
ORDERING INFORMATION
Monophonic transistor equalized turntable preamplifier 994-6244
STEREOPHONIC
Designed for superior performance in stereophonic transcription systems, the M-6442 offers these features: Three-position response selector switch for flat, RIAA/NAB, and roll off equalization; plus a two-position switch to provide a monophonic output from stereo discs, important in many AM/FM and special library situations. Fully shielded, and completely self contained, including power supply. The M-6442 input impedance of 47,000 ohms makes it compatible with virtually all magnetic stereo cartridges.
SPECIFICATIONS
INPUT: 47,000 ohms.
OUTPUT LEVEL: Adjustable from -22 dBm to -12 dBm, from 8 mV input.
RESPONSE: Within -f-1 dB of RIAA/NAB standard curve. Additional high frequency roll off and flat response position switch selected.
DISTORTION: Less than 0.5 % at normal level (-22 dBm to -12 dBm out put). Less than 1.0 % at 10 dB overload (above 8 mV input).
NOISE: 60 dB or lower, with -63 dBm input (-123 dBm relative input noise).
LOAD IMPEDANCE: 600 ohms or 150 ohms, balanced or unbalanced.
MAXIMUM OPERATING AMBIENT TEMPERATURE: +60°C (+140°F).
POWER: 117 volts, 50/60 Hz, 1 watt.
MOUNTING: Two holes for mounting with Gates turntable or inside of any cabinet. May be mounted in any position.
SIZE: 3" wide, 9 1/2 " long, 5" high.
WEIGHT AND CUBAGE: Net weight, 2 lbs.
Packed weight, 8 lbs.
Cubage, 1 cubic foot.
ORDERING INFORMATION
Stereophonic transistor equalized turntable preamplifier 994-6442