JVC CD-1970 (1976)
A front-loading cassette deck with a patented air-damped door and a timer circuit that lets the machine record while you're not in the room.
Audio (December 1976, p.67) noted that the tuning-lock system on a receiver under test was as effective under actual listening conditions as it was on the test bench.
Overview
The CD-1970 is a front-loading cassette deck that JVC built to sit inside a component stack rather than on a shelf by itself. The details give it away: a polished handle, a metal case, and a control layout that assumes you'll be reaching for it in the dark alongside a tuner and an amp. At $399.95 it was not a budget machine, and it carried the feature set to justify the price. It was profiled as a strong example of then-current cassette design, with the front-loading transport, the noise reduction, and the timer provision singled out as the headline facilities. The same review noted that the array of controls and the metalwork gave it, in the reviewer's words, a very professional appearance.
The transport is what separates this deck from its contemporaries in daily use. Seven tape controls sit below the cassette compartment on the right side of the face - six lever switches plus a push-button eject - and the eject mechanism is air-damped and patented. Rather than flinging the cassette out, the door opens slowly and the tape just sits there. The reviewer called the transport mechanically quiet and the controls smooth, eject included.
The numbers are respectable for 1976 but not spectacular by later standards. Frequency response is quoted at 30 to 16,000 Hz ±3 dB with CrO₂ tape, dropping to 40-1,500 Hz ±3 dB with normal tape. Signal-to-noise runs 52 dB, rising to 57 dB at 1 kHz with the ANRS noise reduction engaged. Wow and flutter is 0.09 percent W rms, and THD is listed at 1.2 percent. The motor is a d.c. servo, bias is set at 95 kHz, and the whole package measures 16½ inches wide by 6¼ high by 11 deep and weighs 18.7 pounds. None of that is state-of-the-art for the period, but the figures are coherent for a deck at this price.
ANRS - JVC's own noise reduction - gets the most interesting treatment in the period coverage. The manual recommends engaging it when playing Dolby-encoded tapes, and the reviewer reported that several Dolby tapes played back through ANRS sounded remarkably good. ANRS and Dolby are not the same system, but both operate from 500 Hz up with parameters that shift with frequency and amplitude, so the overlap is real. It's not a substitute for a proper Dolby decoder.
The timer facility is the sleeper feature. The procedure is straightforward: set the controls to record, depress pause, set levels from a source like a tuner, plug both the deck and the tuner into an external timer, and when the timer switches on the deck starts recording automatically. The review walked through exactly this sequence and noted that timers were widely available at electronics parts stores. For anyone who wanted to capture a broadcast without being present, that was the whole point of owning a deck like this in 1976.
The input section is more flexible than the price might suggest. Microphone and line inputs are independent, and both use dual-concentric controls with separate knobs for each channel, so several mixing arrangements are possible without outboard gear. A playback level control, a memory switch, a digital counter, and a tape-run indicator round out the left side of the face. The two VU meters sit in a black recessed panel alongside the ANRS switch and a two-position meter switch. The manual recommends setting the meter switch to peak when recording music with high transient content, which gives a more accurate read on levels than straight VU. Lever switches for tape bias and equalization select CrO₂ or normal (Low Noise or High Efficiency) tape. Standard jacks for headphones and microphones sit below the input controls, and the rear panel carries input and output sockets, a DIN socket, and an unswitched a.c. outlet.
This is a well-built mid-line component cassette deck with a nice transport, a useful timer circuit, and enough input flexibility to handle more than dubbing. The ANRS system is proprietary and won't decode Dolby tapes properly - it just happens to play them pleasantly - and the 52 dB S/N without noise reduction is thin by the standards of even a few years later. The air-damped eject has more parts than a spring-loaded door, so it wants a gentle hand. The 18.7-pound weight and metal case suggest a deck built to last, and the period review backs that up. Anyone buying one today should expect to service the transport and check the belts before trusting it with a favorite tape.
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