ReVox B-790 Vintage Linear Tracking Turntable - with New Grado Silver Cartridge

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General:
The ReVox B-790 is a unique linear tracking turntable that features a quartz-locked direct-drive motor for accuracy along with a small stylus brush that is stored near the arm. 

Most noteworthy is the linear tracking arm that looks super futuristic. This 'table will fit well in a 1970's or 1980's stereo setup. 

Paired with this turntable will be a NEW Grado "Silver" phono cartridge. A great MM (Moving-Magnet) cartridge that sounded excellent in our testing.

This ReVox 'table is fully pushbutton operated, meaning  it's perfect for someone who doesn't want to touch or mess with a delicate tonearm. 

This particular 'table has no hinges for the included dust cover. If you'd like to use the dust cover you simply place it on top.

We performed a light service including the lifting mechanism and other moving parts. It is now tracking precisely and reliably. 

SkyFi Cosmetic Notes:
It has some marks on the plinth and linear arm. Overall it is presentable.

Ownership:
Second Owner

Connections:
RCA + Ground

General Sound:
Smooth, uncolored, undistorted natural and clean

Working Condition:
Working perfectly and calibrated on our custom turntable calibration stand.

Included:
Unit and dust cover.

Packing:
Will be packed using our highly developed in-house process and custom packing materials.Specs:
Turntable speeds: 33.33 RPM and 45.00 RPM
Speed accuracy: +/- 0.01%
Manual speed variation: +/-7% approx
Speed indication: 4-digit LED readout, quartz precise
Platter (turntable proper): 312mm diameter, 1.1kg weight
Run-up time: better than 2 seconds at 45rpm
Braking time: better than 1.5 seconds from 45 RPM to 33.33 RPM
Wow and flutter: better than 0.05% (weighted)
Signal to noise ration: better than 65 dB

Dimensions:
17.8 x 5.6 x 15 inch

Weight:
25 lbs.

Recommended Cables:
Kimber Kable - Phono Interconnects

Kimber Kable - Flagship Phono Interconnects

Testing Process:
First we try to identify any mechanical issues, particularly in the tonearm bearings. We check for freedom of movement or any resistance on both the horizontal and vertical range. There is a quick test for this which involves placing the table on its front edge and allowing the arm to swing freely like a pendulum. We then make any adjustments necessary to achieve minimal resistance and sometimes adjust the bearing pressure. On gimbal tonearms we inspect the cone tip with a magnifier.

We then assess the platter speed using one of several methods, the most accurate being playing a test tone on a test record and measuring the frequency output with a frequency counter or oscilloscope. We also utilize test equipment to measure the wow and flutter to ensure it is within spec. We do this for all speeds available for that particular model (33 RPM, 45 RPM, 78 RPM).

Adjustments are then made to achieve proper speed which will vary depending on the turntable's drive design. Some require an adjustment of an internal or external potentiometer, some will require a pulley or motor adjustment. We also inspect the platter bearing to ensure it is properly lubricated, keeping in mind that some bearings don't require lubrication at all

We then inspect the power supply and address any issues with overworked capacitors, particularly on Linn and later Thorens machines which tend to need attention.

On fully mechanical vintage tables like the Thorens TD-124 and Garrard 301/401 we will go thought the entire mechanism. Then replace any worn parts and lubricate all components necessary to ensure smooth operation, speed change, and low mechanical noise. 

When fitting a new phono cartridge we will go through our detailed calibration process which can involve as many as 12 steps depending on the tonearm design. We perform this work on our custom turntable calibration rig which was developed in-house.

Some of these steps include:
• Pivot to Spindle Adjustment
• Tracking Force
• Anti-Skate
• Tonearm Height
• Lifter Height
• VTA (Vertical Tracking Angle)
• Azimuth
• Stylus Distance and Overhang

We then do a critical listening test using our test records and our test system to ensure proper sonics.