Technics SV-3900
A professional DAT deck built for the handful of people who needed a whole rack of them talking to each other.
Overview
The SV-3900 is a professional DAT recorder, and the thing that set it apart from the consumer DAT machines flooding the market around it was networking. Panasonic's own advertising for the deck told the story of Garry Greth, chief engineer at radio station KLON, who was reading the SV-3900 Pro-DAT manual on a flight from Los Angeles to Frankfurt somewhere over Greenland when he realized he could automate an entire international broadcast chain with it. The pitch was that the SV-3900 could be strung together into an automated network broadcasting twenty-two hours of jazz a day to Europe, with music, features, and commercials cued to start and stop at precise times around the clock with no operator intervention. That's a marketing narrative, not an independent verdict, but it does frame exactly who this machine was for.
The hardware behind that story is a bidirectional serial remote control system running over industry-standard protocols. In mastering sessions, a single MK-390 remote controller could command up to 32 Pro-DAT machines; a computer could drive hundreds. The deck also offered automated random-access high-speed search across up to two hours of stereo material spread over multiple Pro-DATs, and its serial interface ports supported control either from the SH-MK390 wired remote or from an external computer. Panasonic shipped a Software Developer's Toolkit for Macintosh and DOS-based systems so owners could write their own control routines against the machine. For broadcast, recording, and installed-sound work, the SV-3900 was less a tape deck than a node in a system.
The deck's real-world reputation among professionals was strong but not uncritical. But a later user writing to EQ Magazine (December 1992, p.104) was more measured: happy with the SV-3900 overall, but wishing it would record, play, and chase-lock to time code without external boxes. That same correspondent praised the converters in the cheaper Panasonic SV-3700 as better, which is the kind of backhanded compliment that stings a flagship. The complaint about a skimpy manual shows up in the same letter.
So the SV-3900 is a specialist's tool with a specialist's tradeoffs. The time-code limitation and the manual are the recurring gripes, and the converter quality relative to cheaper siblings is a point of contention rather than a settled fact. For anyone assembling a period-correct broadcast or mastering rack, it's a serious piece; for a casual DAT user, it's a lot of machine for the money.
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