Scully 284B-8
Eight tracks on one inch of tape, a DC servo capstan, and a build that made studios trust the name for decades.
Overview
The 284B-8 is Scully's one-inch eight-track master recorder. The spec that matters most to anyone shopping one today is the capstan. According to the survey material, the machine could be ordered with either an AC capstan running 3¾/7½ or 7½/15 in/s, or a DC servo capstan that gave 3¾/7½, 7½/15, and 15/30 in/s. The DC servo version is the one most collectors want. It reaches 30 in/s and pairs with the constant-tension transport Scully built its reputation on. Those two features were what the company leaned on in period advertising. Recording-Engineer (April 1978, p.35) ran copy calling out "the standard DC Servo-Drive and Constant Tension for high value and dependability."
The transport takes up to 14-inch reels. Bigger reels mean longer takes before a reel change interrupts the session, which counts on an eight-track machine. The 284B-8 was announced alongside the rest of the 280 series, and Scully's launch advertising framed it as the new one-inch eight-channel master recorder in the family. Studio-Sound (July 1975, p.75) carried the introduction, describing it as the one-inch eight-channel master with DC servo and 14-inch reels. The same announcement ran in Recording-Engineer (April 1975, p.27) and again in Studio-Sound (August 1975, p.31). The machine was positioned as a serious multitrack head, not a budget entry.
The 284B-8 shares the broader 280B design with its siblings. The survey material describes its feature set as "similar to 280B Series machines." It is the eight-track, one-inch member of a family that also covered quarter-inch mono through four-track formats. The 280B handled full-track, half-track mono, stereo, quarter-track stereo, and four-track on quarter-inch tape, plus a four-track half-inch version. The 284B-8 sits at the top of that range in track count and tape width. It's the one that turns up in studio-sale listings rather than home hi-fi closets.
Treat the frequency response and noise figures for the eight-track carefully. The published survey data for the 284B-8 lists tracks and speeds, but it doesn't give a full response/noise spec the way it does for some other machines in the same roundup. The detailed 50 Hz - 20 kHz and 62/64 dB figures in that document belong to a different Scully model, not this one. Response and noise on the 284B-8 depend on the electronics package and the speed selected, so confirm against the specific machine's documentation rather than assuming a number. What is documented is the format: eight tracks on one-inch tape, with the speed options above depending on capstan type.
Recording-Engineer (February 1978, p.51) ran a piece on the machine that described it as unique for two reasons and pointed to Scully's sales record as the proof of the pudding. The copy cites "more than 200 Scully sales," which is the kind of line a manufacturer runs when the install base is the argument. That's marketing, not an independent measurement. It does tell you the 284B-8 was sold into working rooms in numbers, which is why parts machines and complete units still circulate.
The practical picture is the usual one for a machine of this class. The transport is the big piece of it, and the DC servo capstan and constant-tension system are what make the 284B-8 worth restoring rather than parting out. The 14-inch reel capacity and the eight-track one-inch format are the reasons a studio would keep one alive. The machine appears on the used market now and then. A 1987 Mix classified listed a 284B eight-track one-inch with varisync alongside a console as a package deal. That's the typical way these surface, as part of a room being sold off. This is professional gear, and it takes someone who can service a tape transport and source heads.
The 284B-8 doesn't get the collector attention of the quarter-inch machines. It was never a home recorder. It's a one-inch eight-track master with a servo capstan option that reaches 30 in/s. If one turns up with the DC servo drive and a clean transport, it's the version to have.
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