TC-K777ES

Tree-head system

Separate record and playback heads allow optimum gap settings and impedance ratings for distortion-free recording and greatly extended frequency response. For good tape-to-head contact the heads are mounted in one block and each head is separately adjusted for precise azimuth alignment. The three-head system also enables you to monitor the recorded tape while actually recording.

Newly-developed Laser Amorphous Heads

The record and playback heads are made of a special amorphous magnetic alloy developed by Sony, and its cores are solidly welded by laser. This new highly-durable head provides a wider dynamic range and a more extended frequency response, especially in the high-frequency range. The head is designed to take full advantage of the potential of the metal tapes.

Closed-loop dual-capstan tape drive system

Two pairs of capstans and pinch rollers ensure uniform tape tension and stable tape-to-head contact. As a result, wow and flutter and modulation noise are greatly reduced.

Very stable tape speed

The motors for the capstan and reel drives are linear torque BSL (brushless and slotless) motors with an extremely smooth torque. The speed of the capstan motor is regulated by a crystal oscillator. The shaft of the capstan motor drives the tape directly to eliminate any fluctuation in the tape speed which might be caused by belts or idlers.

Bias and record level calibration

Bias current can be precisely adjusted to the optimum level for any tape on the market, assuring the fliattest possible frequency response. Furthermore, the sensitivity of the tape can be compensated for, permitting optimum performance of the Dolby NR system.

Vibration-free aluminium alloy chassis

The chassis of the tape transport mechanism is made of 3 mm (14 in.) thick aluminum alloy plate, which suppresses resonance of the chassis and greatly reduces the transmission of vibration to the tape.
The chassis of the amplifier section is of copper-plated steel having 5 sides, which prevents eddy-current from circulating and reduces harmonic distortion.

High-quality amplifier section

This cassette deck incorporates a dc amplifier design which assures true fidelity down to the de region. The recording section and the playback section of the right and left channels are physically separated with the signal paths of the right and left channels parallel, using the symmetric Dolby NR ICs. The channel circuits themselves are weil separated by a busbar to eliminate interference. The electronic components used have been carefully selected to provide the highest possible. sound quality, as exemplified by the gold-plated input and output jacks and the use of a newlydeveloped dual FET.

Function memory

A total of 8 steps of tape operations can be memorized and activated in the memorized sequence by pressing one button.

Timer switch

You can set the unit to record or playback at a predetermined time by connection any commercially available timer.