Baandopptaker TB6

Model 6 is one of Tandbergs top models, it was manufactured 1960 - 1966. It has high performance stereo record and playback amplifiers with cathode follower output for use with a separate output amplifier and speaker system.The tape recorder can record and play in full stereo with four track technique, which means two tracks on one half of the tape and two tracks on the other half after turning the tape. It has three speeds, 7 1/2 "/sec, 3 3/4 "/sec och 1 7/8 "/sek.

As can be seen in the picture of the tape transport there are three heads, erase, record and playback head.  Because there are separate record and playback amplifiers it is possible to listen to the recording after the record head to check the quality and also to make some trick recordings, for example sound-on-sound and echo.

Technical data:
Bandwidth
7 1/2 "/s    30 - 20000 Hz +-3dB
3 3/4 "/s    30 - 14000 Hz
1 7/8 "/s    50 -   7000 Hz
Distorsion  3% max (at 400 Hz with full volume indicated on the magic eye)
Wow better than 0,15%, 0,2% or 0,3% at the different tape speeds
Noise level better than 55 dB at full volume
Erase and premagnetizing frequency 78 kHz

The overview picture shows the recorder ready for stereo playback (playback 1 and 2 pressed).
The next picture shows the chassis with the mains transformer upper left, the synchronous motor in the center with the oscillator board beneath it. The record and playback amplifiers are hidden in the screening shield to the right. The last picture shows the tape transport with the three heads.