Viking enters 8-trackers
Viking, a pioneer in the 4-track tape cartridge equipment field, has introduced three 8-track tape cartridge players for home use. All units have a low silhouette design. Model 811 is a table-top unit in a walnut case, incorporating playback preamplifiers for use with existing stereo equipment ($99.95). Model 811W ($149.95), also a table-top unit in a walnut case, has a built-in power amplifier, two speakers, and volume, tone, balance controls.
In addition, it has a speaker switch and stereo headphone jack. The third unit in the series, Model 811P ($149.95), is a portable version of the 811W. Its case has a two-tone vinyl finish.
All models in the series feature a frequency response of 40 to 15 kHz at its 33/4 ips speed, signal-to-noise ratio of 50 dB peak, and wow and flutter of 0.3% RMS, according to the manufacturer. Tape reproducers with self-contained power amplifiers feature 10 watts (IHF) total power output, and include two 5 1/4-in. high-compliance full-range speakers.
The players have pushbutton track selection and numerical track indicators.
Sansui "bookshelf-size" AM/FM stereo receiver
Sansui introduces a compact 16 1/2 in. wide x 12 3/16-in. deep x 5 1/8-in. high (excluding knobs and rubber stands) AM/FM stereo receiver, Model 400. The solid-state unit's amplifier section produces a total of 60 watts (IHF) at 4 ohms. Power bandwidth at 8 ohms is 20 to 50 kHz; frequency response, 20 to 30 kHz ±1 dB; harmonic distortion, under 1% at all power levels up to rated output. The FM tuner section features 2 microvolts IHF sensitivity, a signal-to-noise ratio of more than 60 dB, selectivity of more than 45 dB, stereo separation, better than 35 dB. AM sensitivity is 20 microvolts.
Switching from FM mono to FM stereo broadcasts is accomplished automatically. A stereo indicator changes in color if the dial pointer crosses a station broadcasting in FM stereo.
A combination of a silicon controlled rectifier and quick-acting fuses protects power transistors from damage due to short circuits.
In addition to the usual assortment of controls, the front panel has a speaker selector switch, loudness on-off switch, stereo headphone jack, noise filter switch, a tape monitor switch, and an FM tuning meter. The unit is priced at $239.95.
Battery-operated test oscillator
Model 930, a 1 1/2-in. x 5 1/2-in. x 5 1/4 in., battery-operated test oscillator from Universal Audio, N. Hollywood, Calif., has been introduced for use in recording, broadcast and motion picture sound facilities. The professional unit provides three fixed audio sine wave frequencies for setting program levels and for checking frequency response of equipment. Standard units produce 30 Hz, 700 Hz and 10 kHz signals, though other frequencies are available on special order.
The output is continuously variable from-60 dBm to 0 dBm into 600 ohms, unbalanced. It's powered by internal 12-volt batteries or an external 24 Vdc source. Frequency stability is ±5%. Distortion is said to be less than 1% at all frequencies. $87.00, less batteries.
(Audio magazine, Jan. 1968)
Also see:
Tape Guide, Herman Burstein
AUDIO EQUIPMENT PROFILES (Jan. 1968)
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