Tuesday 19 March 2024

Sony TC-850-2






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 34  7 12  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)

Tuesday 19 May 2020

Beo Sound Ouverture CD/Tape/Tuner

BeoSound Ouverture CD/Tape/Tuner
Manufactured: 1994 - 2003
Designer: David Lewis
Colours: Black, Silver

"BeoSound Ouverture: the design may be a Bang & Olufsen classic, but BeoSound Ouverture and BeoSound 3000 refuse to rest on their laurels. Access to new musical sources and fresh loudspeaker options ensure that the concept remains an open invitation to make something special out of your music" (B&O catalogue 2001 -2002)

This stereo has two different names: BeoSound Ouverture in Europe and BeoSound 4000 in the rest of the world. This is the only stereo system, so far, to support the new MasterLink system without any add-ons. It's really a follow up to the Beocenter 2500 which was the first and original stereo with this somewhat different look. Along with the launch of this unit in 1991 (as the BeoSound 2500) Bang & Olufsen also started selling the new remote control - Beo4.

The difference between the Ouverture and Beocenter 2500 is that the newer model doesn't feature two-way communication and it has instead a completely new CD mechanism. It also holds some new features when it comes to the CD. But the most important difference is the MasterLink connection. With this system you can connect the unit to, for example, a BeoLab 2000 or BeoLab 3500 without any further electronics.

Reach out and the doors glide quietly aside, while a gentle light spreads from within. It's BeoSound Ouverture's way of saying, "welcome" and part of the experience every time you put on a new tape or CD. CD player with programming, tape recorder with auto reverse, FM/AM radio with pre-set, timer function, optional Beo4 remote control operation, connections for Beolink® and headphones, optional wall bracket and floor stand.

BeoSound Ouverture's unassuming rubber key pad hides a contact foil, which, in turn, covers a matrix of vertical and horizontal cords. When a control is pressed, the cords connect and the microprocessor is activated.



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.


Disc format: CD
Digital converter: 2 x TDA1540D, 16 bit linear
CD Mechanism: CDM-0
Frequency response: 20Hz to 20kHz
Dynamic range: 90dB
Signal to Noise Ratio: 90dB
Channel separation: 90dB
Total harmonic distortion: 0.005%
Line output: 2V
Dimensions: 416 x 81 x 300mm
Weight: 8kg
Year: 1983

More Information: