Linn Valhalla Power Supply

Here we have an upgrade for early Linn Sondek turntables in the form of a Linn Valhalla power supply. It is in good condition and will be appropriately packaged along with switch and mains cable.
Linn Say….
The Valhalla is designed to isolate the rotation of the turntable motor from variations in the mains supply. At the heart of the Valhalla is a very low noise crystal oscillator, which produces a highly accurate square wave at an exact frequency. As the LP12 motor runs at its quietest when driven with a clean sinusoidal waveform, a precision filter is employed in the Valhalla to remove harmonics from the square wave, leaving only a pure waveform. The most uniform torque is delivered from the motor when both phases are driven at ninety degrees with respect to one another and this is achieved by a ninety-degree phase-shift network after the filter. The two resulting sinusoids are then boosted by an amplifier circuit and fed to the motor windings.
Introduced: 1982
Mains Supply Power Consumption 90 – 132 V; 198 – 264 V (AC) < 13 W