YAMAHA INTERNATIONAL CORPORATION, P.O.BOX 6600. BUENA PARK, CA 90620
The tuner that restates the state of the art.
Imagine a stereo FM tuner that performs as cleanly and vividly as your favorite records. That has distortion so low it defies laboratory measurement. That automatically rejects all unwanted noise and interference.
You're looking at it. The YAMAHA CT-7000... the new state of the art tuner. Its cost? $1,200.
So listen at your own risk, because you may never be satisfied with any other tuner again.
It's the first tuner with Negative Feedback. Long used in amplifiers to lower distortion, the application of Negative Feedback to the CT-7000 has all but eliminated MPX distortion. (At 400 Hz, for example, it's an unheard of 0.02%-and that includes distortion caused by the measuring instrument itself.) Also, Negative Feedback eliminates the need for distortion-causing Side Carrier Filters.
For superior separation of the left and right channels, Yamaha designed a unique Phase Lock Loop MPX Decoder Instead of being a single IC chip as in other tuners, our Phase Lock Loop consists of discrete components mounted on their own circuit board, thus allowing precise control in production and hand-tuning adjustment to meet exact specifications.
A 7-Gang Tuning Capacitor? Most tuners get by with 4 or 5 stages. We refused to. By designing the Front End with our unique 7-Gang Tuning Capacitor and utilizing Dual Gate MOS FETs, the CT-7000 can receive the weakest stations and, at the same time, accept an extremely high input (up to 1 volt input signal) without overloading.
Advanced IF Amp Stages. Inside the IF amp stage is the world's finest combination of ceramic and L/C filters. This has resulted in an advanced degree of selectivity (the ability to pick out a desired signal while rejecting neighboring frequencies). And maintains proper phase linearity and minimum distortion (less than 0.08%).
A selectable IF Mode lets you choose the width of the tuner's selectivity ... narrow setting for crowded band areas; wide setting for un-crowded areas. The tuner's reception can be optimized for virtually every listening situation.
Some other important differences. An Auto Blend Logic Circuit automatically operates in three stages to blend high and middle-high frequencies for maximum stereo separation with minimum noise and distortion on even the weakest stations. And you don't need to get up and switch in the MPX filter when a station turns noisy. The CT-7000 does it for you-silently, automatically.
There's Auto-Touch Tuning that automatically disengages AFC while you tune, for maximum station selection. When you release the tuning knob, AFC reengages and locks onto the station, electronically fine-tuning it to the one point of maximum stereo separation and minimum distortion.
A unique Variable Muting Control makes it possible to receive music where there used to be just noise. This control lets you select the muting cut-off level to an unbelievably low 10 dB (3 MA), yet it can be adjusted to accommodate stations up to 30 dB (30 mil) in level.
Variable Output Level permits adjustment of the tuner's output to match the other input levels. So, when switching from tape, to records, to the CT-7000, you don't have to readjust your volume control.
The end of Multipath Distortion. Reflection of FM signals off their surroundings causes multipath distortion. And that causes muddled, distorted sound. Until now, you could rely on inaccurate-signal strength meters to orient the antenna-or you could invest about 800 dollars in an external oscilloscope.
The CT-7000 neatly solved that problem with a unique signal minus multipath circuit which when activated by the S-M front panel relay, allows the signal strength meter to accurately display the multipath content of the incoming signal. Without guesswork, you now can zero-in the antenna incoming signal to reduce to a minimum multipath interference and distortion. In fact, tests show the S-M meter of the CT-7000 to be three times more accurate for this purpose than an oscilloscope.
Some things we didn't have to do. We could have settled for just having the best performing tuner in the world. But we also wanted it to be the most reliable and durable.
That's why all the push buttons are silky smooth, precision reed relays instead of switches.
Why the flywheel is solid brass. And why, beneath the walnut wood case, each circuit board is protected by a stainless steel cover to guard against stray noises and interference.
Or as Stereo Review summed it up in its January 1975 issue: "Judged by its overall measured performance, the Yamaha CT-7000 is clearly one of the finest FM Tuners ever made. In no respect was it less than superb, and in a few areas--notably distortion, image rejection. AM rejection, and pilot-carrier suppression--it was either far better than anything we had previously measured or simply beyond the measurement abilities of the best laboratory instruments Your Yamaha Audio Dealer will be pleased to demonstrate the incomparable CT-7000. Plus other state of the art Yamaha components that make up the system-designed to make you unhappy with what you're listening to now.
Because, like life, the best is always yet to come.
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