Golden Age Of Audio: HI-FI

Showing posts with label HI-FI. Show all posts

Tuesday, 19 March 2024

Sony TC-850-2

https://hifi-wiki.com/index.php/Sony_TC-850-2

https://www.radiomuseum.org/r/sony_stereo_tape_deck_tc_850_2.html

https://reel-reel.com/tape-recorder/sony-tc-850/

DESCRIPTION

The TC 850 was a semi-professional three-motor, four head tape deck with a 10½ ” reel capacity.
The recorder could record in half-track stereo, but thanks to the extra playback head, quarter-track stereo playback was possible.
All transport controls were servo-controlled, which resulted in a seamless transition between transport modes. The recorder was considered ‘easy to use’ by reviewers.
This was not a cheap machine, in 1974 it cost almost twice as much as a Revox A77 so it is fairly easy to see why not many were sold.

Number of Transistors
77

Semiconductors

Main principle
Audio-Amplification

Wave bands
- without

Details
Tape Recorder

Power type and voltage
Alternating Current supply (AC)

Loudspeaker
- This model requires external speaker(s).

Material
Various materials

from Radiomuseum.org
Model: Stereo Tape Deck TC-850-2 - Sony Corporation; Tokyo

Shape
Tablemodel, with any shape - general.

Dimensions (WHD)
445 x 501 x 254.5 mm / 17.5 x 19.7 x 10 inch

Notes
Sony Stereo Tape Deck Model TC-850-2.
Track system: 2-track, 2-channel, stereo/monaural system
Heads: 1 x 2T record, 1 x 2/4T playback, 1 x erase
Motor: 3 motors: 1x capstan, 2x reel
Reel size: up to 10.5 inch reel
Tape speeds: 3 Speeds: 3 3⁄4 7 1⁄2 15 ips
Wow and flutter: 0.03% (15 ips)
Frequency response: 20Hz to 30kHz (15 ips)
Signal to Noise Ratio: 59dB
Input: 70mV (line), 0.2mV (mic)
Output: 0.775V (line)
Semiconductors: 77x transistors, 79x diodes

See also:
Sony TC-850-4 (4-Track Version)

Net weight (2.2 lb = 1 kg)
26 kg / 57 lb 4.3 oz (57.269 lb)

Wednesday, 20 March 2019

Marantz CD-73 Compact Disc Digital Audio Player (1983-84)

The Marantz CD-73 Compact Disc Digital Audio Player employs ultra precise manufacturing techniques and sophisticated digital and servo technology to assure you an audio output which is the full equivalent of that at the studio console where the original recording was made. Your listening room will never be the same again!

Marantz has succeeded in developing a mechanism of unprecedented small size through use of its own independently developed ultra compact laser beam pickup and linear motor mechanism. This enables slim styling which complements that of other equipment in your audio set-up.

The disc loading mechanism in this player represents a new concept in loading compact digital audio discs which is based on Marantz's many years of experience with cassette decks. When the motor drive drawer is pulled out, the disc clamper automatically rises and the front panel tilts. All that is necessary is to set the disc in place.

The independent functions of three separate microprocessors are employed to ensure that the fullest use is made of the potential of digital audio recordings. Two high-speed 8-bit microprocessors interact with each other to assure perfect tracking by the focus servo, radial servo, and platter servo.

Together with a random access program, this unit allows three different programs to be stored for playback control. Each program allows up to 15 selections to be played back in any desired order.

Use of Marantz's own fully balanced swing mechanism ensures superb resistance to vibrations and inclination, as well as making it possible to increase the speed of random access.