edwin,
That would be it! Just looked them up. Guess they didn't last that long. Found this little quote:
In 1979, Tapco was purchased by Electro-Voice who slowly phased out the Tapco name and blended the Tapco products into their own product line. The factory space in Redmond, Washington remained active, producing electronic products for EV until perhaps 1989, when the lease ran out. The entire industrial park was razed and high rise office buildings constructed. Microsoft is the current occupant.
Doesn't that just figure, entire park was razed for Microsoft. Figures.
As I remember, they were a pretty good, inexpensive little mixer which was expandable and comparable (because it was really pretty clean) to some mixers which cost a heck of a lot more. It wasn't the first mixer we had but, because of its cleanliness, we got rid of the old one and added to the little 8 channel. Something came up and we got a 32 or 64 channel. But that was a different make. Soundcraft???
Soundcraft sounds about right but finding a board I'd recognize from the 70's. Ugh, I doubt it. Brain just isn't quite what it used to be.
Good find though edwin!