Gates SA-50 Dual Channel Console
A broadcast workhorse that stations bought, patched, and fought over in the classifieds — nine mixing channels and dual program amplifiers in a box built to stay on the air.
Overview
The SA-50 is a dual-channel speech input console from Gates, and the way stations treated it tells you almost everything. These boards didn't get retired so much as they got handed down — a 1968 classified in Broadcasting shows WRFC in Athens, Georgia listing a nine-position SA-50 as "available mid-April," while out in Dodge City, Kansas, chief engineer Chuck Stark at KGNO was advertising a complete two-channel SA-50 "now in use and in good operating condition." When a piece of broadcast gear shows up for sale still working, still in service, and still being described by its chief engineer by name, that's not nostalgia — that's a console that earned its keep.
Gates positioned the SA-50 at the top of its speech-input line. A 1952 advertisement in Audio (June 1952, p.17) laid out the family plainly: three consoles "that fully meet every TV need," with the SA-50 described as the "ultra complete" dual-channel equipment, sitting above the SA-40 single-channel console and the 52-CS Studioette. That hierarchy matters for anyone trying to understand what they're looking at on a surplus listing — the SA-50 was the fullest expression of the line, not the entry model.
The architecture is what broadcasters were paying for. Nine mixing channels feed dual program amplifiers, with dual VU metering — the kind of redundancy a station needs when one program path is feeding a network and another is feeding local spots, or when a live feed and a tape machine both have to be up at once. The same Audio advertisement (September 1952, p.41) repeated the pitch almost verbatim a few months later, which suggests Gates was running this campaign hard — the SA-50 was a console the company wanted stations to see as the default choice for a control room build-out.
What's genuinely useful about the SA-50's paper trail is how it documents real deployment. A station history preserved in a Gates manual describes chief engineer Steinbacher and assistant Rodney Smeal adapting the station's SA-50 dual-channel board for use in a new sub-control room — Line 1 amp feeding channel 1 on an Otari and channel 1 of a Magnecord 1022, Line 2 amp feeding channel 2 of both reel-to-reels. That's the SA-50 doing exactly what dual-channel consoles were built to do: splitting program across two tape machines without a separate router. The same sub-control room ran two Gates turntables and a Gates playback cart alongside the console, which tells you the SA-50 was the hub of a working air room, not a display piece.
The console's reputation in the trade press was built on Gates' broader standing as a speech-equipment house. The 1952 ad copy leans on the company's thirty years of building "fine speech equipment," and frames the SA-50 as the flagship of that tradition. Whether that translated into measurable performance is harder to pin down — the period advertising is clearly marketing, and independent bench numbers for the SA-50 don't appear in the material available here. What the record does show is adoption: stations kept them, patched them, and sold them working, which is its own kind of review.
For a collector today, the SA-50 sits in an awkward but interesting spot. It's a broadcast console, not a hi-fi component — it wants a rack, it wants balanced lines, and it wants someone who understands why a board would have two program amps instead of one. The classifieds record is the best guide to what's out there: complete two-channel units in operating condition have changed hands through station sales and trade listings, and the fact that engineers were still advertising them as "in good operating condition" decades after the 1952 ad campaign says something about how long these stayed in service. Parts and documentation surface through broadcast-equipment channels rather than the consumer audio market, and anyone chasing one should expect to deal with a seller who knows exactly what it is.
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