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What is stereo?




There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.




H.H. Scott '59





Visualizzazione post con etichetta PHASE LINEAR. Mostra tutti i post
Visualizzazione post con etichetta PHASE LINEAR. Mostra tutti i post

Phase Linear 8000 turntable

Model 8000 Series Two Linear Motor Turntable

No other turntable can match the Phase 8000, because no other turntable has such advanced motors. You can't buy a quieter turntable. Or one with as low wow and flutter. Or one that tracks better.

The Phase 8000's tangential tracking tone arm keeps the stylus in perfect 90° tangent with the grooves. It's the same way the master disc was cut, so the motion of your stylus is identical to the cutterhead stylus. There's absolutely no tracking distortion. No crosstalk. No skating force that can actually re-cut your grooves.

 


New Linear Motor Eliminates Mechanical Linkage

Other manufacturers have tried to move tangential tone arms with worm gears. Belts. Rollers. All with the same sad result; Mechanical connections pass on the noise and vibration of the motor. The Phase 8000 solves this problem with an ingenious Linear Motor. The tone arm base is a permanently magnetized armature that glides along guide bars above electro-magnetic coils. The arm moves by direct induction - not mechanical connection. So there's virtually no noise. Inside the tonearm, an opto-electric detector cell senses the slightest tracking error, and instantly sends correcting signals to keep the arm on track.

 

New Quartz-PLL Direct Drive

Our new slotlles, coreless Stable Hanging Rotor DC motor virtually eliminates "platter wobble". Quick start/stop. Speed deviation is lower than 0,002%.

 


Specifications

Motor and Turntable Section

Drive System:  Direct drive

Motor:  Quartz PLL Hall motor

Platter:  310 mm diam. aluminum die-cast alloy

Inertial Mass:  330 kg-cm² (including platter mat mass)

Speeds:  33-⅓ and 45 rpm

Wow and Flutter: 

DIN :  less than 0,35%

WRMS :  less than 0,025%

Signal-to-Noise Ratio:  better than 78 dB (DIN-B)

Rotational Characteristics

Build-up Time:  with 90° rotation at 33-⅓ rpm

Speed Deviation:  less than 0,002%

Speed vs. Load Characteristics:  stable up to 220 grams drag load

Speed Drift: 

less than 0,00008% per hour at 33-⅓ rpm

Less than 0,00003% per degree of temperature change at 33-⅓

Tonearm

Type:  Linear motor direct-drive static-balance type; linear-tracking arm

Effective Arm Length:  190 mm

Overhang:  0 mm

Usable Cartridge Weight:  4 g to 24 g

Arm Height Adjust Range:  ±3 mm

Headshell Weight:  10,5 g

Semiconductors:  22 ICs; 17 Transistors; 16 Diodes; 3 Hall Elements; 14 LEDs; 5 Photo Transistors; 1 CdS

Miscellaneous

Power Requirements:  110 - 120 V AC, 40/60 Hz

Power Consumption:  35 watts

Dimensions (W x H x D):  494 x 154 x 456 mm (19-7/16" x 6-1/16" x 17-15/16")

Weight:  12 kg (26 lb 8 oz)


 

Phase Linear Model 400


Solid State Stereo Amplifier Model 400 has gained an international reputation as the world's mos reliable and most accurate high powered amplifier. It puts out 201 watts per channel which enables it to drive all the better bookshelf speakers as well as the most exotic loudspeakers available. It also rates better than any amplifier in its power range on a dollar per watt basis.
If you contemplating the purchase of high powered amplifier, you should audition the Phase Linear 400.

Circuit description
The Phase Linear amplifier consists of two direct coupled designed linear power amplifiers combined to form a single, dual channel unit capable of extremely high power output. The output stages employ twelve high current, high voltage, triple-diffused silicon output transistors arranged in a quasi-complimentary format and biased for class AB operation. The output stages are driven by two stages of Darlington connected current amplifiers, which in turn are driven by a predriver voltage amplifying stage swinging the full supply voltage.
The upper output transistors are driven into saturation by a constant current source and the lower transistors are driven by the predriver. Bias control is accomplished by a bias regulator consisting of two voltage reference diodes, a regulator transistor, and temperature compensating circuitry. The low level stage consists of a differential pair which provides voltage gain and level shifting to accommodate the predriver requirements.
 The patanted protective circuits consist of four small analog to digital computers,each computer monitoring the operating conditions of four output transistors. Output current,voltage, energy, time raate of current and voltage change, and common mode conduction are monitored continuously during amplifier operation. If the value any one, or the sum value of more than one or all of these quantities exceeds a safe stress level for the transistors, the computer instructs a "disconed circuit" to instantly shut down the amplifier.


Specifications:
Power:  201 watts per channel (min. RMS at 8 Ω, 20-20,000 Hz, with no more than ,25%T.H.D.)
Hum and Noise:  at least 100 dB below rated output
Damping Factor:  1000 : 1 at 20 Hz
Rise Time:  less than 1,7 microseconds
Phase Shift:  lagging 12 degrees at 20 kHz
Sensitivity:  1,75 volts for rated power output
Slew Rate:  11 volts/microsecond.
Meter ballistics:  V.U. calibration is such that impulsive waveforms result in 0 V.U. at clipping
Stability:  absolutely stable with all loudspeakers including electrostatic units.
Protection:  electronic energy limiters together with supply fuses prevent excursions into unsafe operating regions
Dimensions (W x H x D):  19" x 7" x 10"
Weight:  35 lbs
Finish:  light brushed gold, baked enamel and black anodize.

Phase Linear Model 2000


 The Model 2000 Stereo pre-amplifier offers excellent specifications, outstanding sonic performance and a unique "Ambience Circuit" designed to retrieve out-of-phase signals while using the 2000 in a stereo mode. Prior to this time one had to add another amplifier and an additional set of speakers to utilize such a system, but this is not true of the ambience system in the 2000. When listening to a record played through the 2000 with the ambience circuit on, you will hear instruments that would not be audible on our preamps. The music is on the record out of phase and the 2000 corrects that problem


"In measurements made at CBS, the Model 2000 proved itself a strong performer. In neither channel did output clipping occur at less than 12,2 volts, whether driven singly or together. At an output level of 2 volts (more than enough for full output from most power amps), harmonic distortion was less than 0,02% in all cases - well below Phase Linear's 0,1% spec. And if we ignore as inaudible all harmonics above 20 kHz, harmonic distortion is  no more than 0,0066%"
"The Model 2000 is as super in the listening as it is smooth in the handling. Once one has become used to the controls, they are convenient to operate and satisfying to touch. The extra flexibility in the tone controls (the separate knobs for each channel, as well as the variable turnover points) delivers worthwhile options."




Specifications
Total Harmonic Distortion:  Basically so low it is unmeasurable. Guaranteed less than 0,1% at rated output with 1 HF measurement.
Frequency Response:  Phono ±0.5 dB of RIAA Standard
Input Sensitivity: 
High level input : 40 K
Low level input : 47 K, 290 pf
Hum and Noise:  20 Hz - 20,000 Hz (inputs shorted)
High level : 88 dB belov 2 V
Low level : 74 dB a 10 mV input
Ambience Signal:  (L-R) =L & (R-L)=R
Volume Control Tracking:  Less than 1 dB Tracking error
Gain: 
Low level (Phono) to pre-amp output : 56 dB at 1 kHz
Phono to Tape Output : 41 dB at 1 kHz
High Level to Pre-amp output : 15 dB at 1 kHz
Maximum Output Levels:  Rated at 2 V : maximum 10 volts will source a 5 kohm load
Bass:
Turnover frequency 50 Hz : ±11 dB at 20 Hz
Turnover frequency 150 Hz : ±13 dB at 20 Hz
Treble:
Turnover frequency 5 kHz : ±10 dB at 20 kHz
Turnover frequency 2 kHz : ±14 dB at 20 kHz
Dimensions:  5½" (H) x 19" x 6" (D)
Weight: 15 lb

Phase Linear Model 200


 The Phase Linear Model 200 Stereo Amplifier is the best amplifier you can purchase for medium power handling applications. At 105 watts per channel, the 200 complements all high quality bookshelf speakers in the efficient to medium efficiency range. The 200 has enough power to eliminate clipping with most efficient speaker system as well as many inefficient systems
The Phase 200 has a Velocity Feedback switch which allows for a Reduction in current feedback. This results in a lowering of the damping ratio and this has been a recommendation made by various speaker manufacturers. In numerous speaker systems this reduction in feedback will provide a warmer, more mellow sound.



Specifications
Power: 105 watts per channel, minimum RMS at 8Ωfrom 20 Hz to 20 kHz with no more than 0.25% THD
Hum and Noise:  At least 95 dB below rated power
Damping Ratio:  100 : 1
Rise Time: less than 1,7 microseconds
Phase Shift:  lagging 12 degrees at 20 kHz
Sensitivity:  1,5 Volts for rated power output
Input Impedance:  18 kohms
Protection:  Current limiting amplifier protection (output relay electronically operated for speaker protection)
Dimensions:  19" x 5½" x 8¾" (W x H x D)
Weight:  16 pounds

Phase Linear Model 5000


 The Phase Linear Model 5000 FM Tuner fully compliments our line of separate components both in appearance and philosophy.
Until now, separate component manufactures have put most of their design emphasis into reaching the theoretical limits of FM receiving. Few consumers, however, can actually benefit from these technical achievements simply because the broadcast itself is too mediocre. A cure for that problem is what we have added to our tuner.
The Phase Linear 5000 combines excellent receiving capabilities along with a unique linear expansion circuit which compensates for the problems associated with FM broadcast. Consequently, the 5000 FM Tuner delivers dynamic range and sonic quality audibly beyond that which has been available.


 Features:
Large slide rule dial;
Variable muting 2 µV to 100 µV;
Fixed and variable outputs;
25 µSec and 75 µSec de-emphasis;
75 Ω cable connector;
Expander with selection for 4 dB and 9 dB, tailored to "decompress" typical FM compression techniques;
L.E.D. multipath indicator which shows instantaneous multipath distortion;
Center tune and signal strenght meters with back panel calibration adjustments;
Panel light dimmer switch.



Specifications
Sensitivity:  2,0 µV
50 dB Quieting level:  5 µV mono, 25 µV stereo
Signal-to-noise Ratio: 74 dB mono, 72 dB stereo
Selectivity:  75 dB
Capture Ratio:  1,7 dB
Distortion:  1 kHz - less than 0,25% mono or stereo
Separation:  1 kHz - greater than 40 dB
Suppression at 1 kHz:  Greater than 40 dB
Suppression at 38 kHz:  Greater than 40 dB