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Chazz

SOLD: FS: Yamaha CT-7000 Tuner

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Posted (edited)
Item Condition: Used
Shipping Options: Pickup available but audition is not available.,Shipping is available at agreed cost.
Suburb or Town: Wahroonga
State: New South Wales
Payment Method: PayPal, COD
Reason for selling: No longer used

This tuner is acknowledged as being one of the best ever made.

 

Has been upgraded with 2 metre Yarbo 2200 Silver power cable and Furutech US plug.

 

I bought this from a fellow Stereonet member about a year ago (hope it's ok using the same photos keys 1234!).  I just don't listen to radio enough to justify holding on to it.   Unlike most modern tuners it weighs as much as an amplifier.

 

Great reviews here:  http://www.audioreview.com/product/other/tuners/yamaha/ct-7000.html

Description

The Yamaha CT-7000 distortion characteristics are so negligible even the most sensitive testing equipment can't measure them.

Gone are the days when the FM tuner was the weak link in a top of the line stereo system. With the CT-7000, Yamaha gives you clear, distortion free FM stereo response that measures up to (and probably surpasses) every other part of your stereo system.

Even if you don't fully understand the technical details of this radically new design you can hear the difference - because the CT-7000 provides studio like FM stereo even in the most difficult reception areas, with the lowest distortion of any tuner in the world.

Specifications

Type: Mono/Stereo Tuner

Tuning Bands: FM

Tuning Scale: Analogue

FM Tuning Range: 88 to 108 MHz

Sensitivity: 1.6uV (FM)

Signal to Noise Ratio: 75dB (FM)

Distortion: 0.2% (FM)

Selectivity: 80dB (FM)

Frequency response: 30Hz to 15kHz (FM)

Output: 775mV

Dimensions: 436 x 144 x 352mm

Weight: 10.8kg

 

Photos:

 

PLEASE READ

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Edited by Chazz

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Radio enthusiasts will be foaming at the mouth - these are legendary - reputation as one of  the best tuners ever made.

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I'm keen. Can you please explain the power plug. Is it 240v? Or does it go into the amp?

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I  Think by the looks they just have a us  style male plug on it 

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Yes - 240v but US style plug

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GLWTS!

 

https://www.fmtunerinfo.com/yamaha.html

 

< Yamaha CT-7000 (1974, $1,200 in silver [photo1, photo2] and 1976, $1,250 for the all-black CT-7000B [photo], schematic left, schematic right, block diagram, circuit description, entire schematic (same as left and right halves)) search eBay
The fairly scarce CT-7000 is a beautiful, solidly built (29 pounds) analog FM-only tuner with the best sound our panelist Eric recalls ever hearing in his system, surpassing (among others) the top Kenwoods and Sansuis. The CT-7000 is particularly impressive at the low end. It is a pure audiophile tuner in stock form, with poor adjacent channel selectivity even in the Narrow IF mode. The CT-7000's features include a headphone output jack with level control, switchable muting with an adjustable threshold, and a signal meter that doubles as a multipath meter. The rear panel has fixed and variable audio outputs and multipath output jacks for an oscilloscope.

Our contributor David "A" reports: "The CT-7000 has a 7-gang tuning capacitor (two gangs in front of the first MOSFET RF amp, two in front of the second MOSFET RF amp, two in front of the MOSFET mixer and one for the bipolar local oscillator). It uses 7 IF filters, a mix of ceramic and LC types. The IF would be relatively easy to modify for increased selectivity, but I would wonder why anyone would want to since the CT-7000 is oriented toward sound quality and the IF choices were made in that vein. Further, one of the major reasons for the sound is the characteristics of the wide IF (the only 18 dB alternate channel selectivity makes this perhaps the widest Wide mode ever in a quality tuner). The CT-7000 uses a discrete MPX decoder. The tuner design seeks fidelity (and to a lesser degree RF performance) but in my opinion, after owning most of the top tuners, it's not in the top 5 for RF or audio quality. The quieting curve is very steep (although not as steep as the Kenwood 600T and 650T or Pioneer TX-9100), but the absolute signal-to-noise ratio plus distortion is well behind the best. I also find that the stereo separation and distortion are very good (especially for the age of the tuner) but again not up with the very best (high-frequency distortion and pilot leakage are more of a problem than the separation). The CT-7000 owes part of its sound quality to its flat and extended frequency response, but mostly to the ultra-wide IF and limiter choices which were made based on signal fidelity. Given the tuner's current age, a stock unit will be badly in need of replacing all of the electrolytic capacitors and a good alignment.

"The CT-7000 is not the best choice for DXers because of the lack of front end/overall selectivity, less than ideal RFIM characteristics and the presence of AFC. Overall, I prefer a Yamaha T-2 (with all polar and electrolytic coupling caps replaced and aligned perfectly) for sound quality (although not in the bass), or a Yamaha T-85 for DXing if one is predisposed to Yamaha tuners. What you do get with the CT-7000 is perhaps the best construction quality ever offered in a consumer tuner as well as a unique aesthetic look that some people love. For the money, the top Kenwoods are much better tuners (and better buys) from an RF perspective, especially when modified. And for sound, tuners like the Accuphase T-106 eat the CT-7000 alive! [By no means a universally held view. - Editor] Also, I don't like how Yamaha implemented the AFC in the front end of the CT-7000, or the fact that it has AFC at all. I found no overall problems that are likely to make the CT-7000 unreliable over time, but it is a pain to replace all of the electrolytics and realign it for best performance (if you own or buy one make sure that whoever aligns it will take the time to go through it carefully for best performance)."

Our contributor Goran says, "The MPX unit of the CT-7000 is one of the very best ever made. Distortion around 0.01%, separation better than 45 dB at 15 kHz, 65 dB at 1 kHz and very low noise levels. It must be stressed that the CT-7000 was an all-out assault by Yamaha back in the '70s to make the best FM sound reproduction possible, and what they came up with was state of the art and hard to beat unless you design something even closer to perfection than what is there already." But Goran observes that after 30 years, "many 'lytics can be exchanged for plastic types which makes for an improvement. Not to mention much longer life since 'lytics will always, slowly, get worse over time and plastic capacitors, polyester, polycarbonate, polypropylene, polystyrene will not change at all over time."

Our contributor Warren M. adds, "I use the fixed outputs rather than the variable ones, which definitely introduce some degradation. The difference between WIDE and NORMAL is very subtle and is what it says (i.e., Wide vs. Normal as distinct from Wide/Normal vs. Narrow) - this is NOT a DXing tuner and would NOT be suitable (without modification) for crowded airwaves. I have terrible multipath on one of our two classical stations in Sydney, using our rooftop TV antenna. On good days, with the CT-7000, you cannot tell that multipath is affecting the sound, but on bad days it can be close to unlistenable (but still better than any of my other several tuners). The better the reception, the better the performance, but quieting comes on very fast and it is fairly sensitive on a clear signal without multipath issues, showing much better performance in this regard than my modified Sansui TU-317. The headphone amp is outstanding. It blows away the headphone facility in my Arcam Alpha 9 amplifier and is as good as (but very different from) my dedicated solid state Chinese headphone amp. The Chinese one is much quieter but has a clinical edge which the CT-7000's headphone amp does not have. The inside of the CT-7000 is laid out like engineer's heaven - undoubtedly the best presented electronics of any piece of hi-fi I have ever seen. But it has a design fault in that the power supply cannot dissipate its heat effectively enough, resulting eventually (after some years) in damaged power supply electrolytics."

CT-7000s in good condition used to sell for $700-1,000 on eBay, with lows around $500 if in poorer shape and as high as around $1,200 for mint ones. Recently, however, the most common range seems to be $440-600. A CT-7000 with the original box sold for $1,100 in 12/09, and another went for $904 in 6/11. See how one CT-7000 sounded compared to other top tuners on our Shootouts page, and read more of David's analysis on the Ricochets page. There's also a page on the CT-7000 at The Vintage Knob.  >

 

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