Audio Engineering Magazine Pt 4: Schematics
Today we’ll look at some of the more interesting audio-circuit plans and schematics from the first two years of Audio Engineering magazine. Pictured above is a great lil’ amplifer (approx. 30watts) that uses a single 6AS7G tube for push-pull output. I’ve never used these tubes, but they are real cheap. Apparently they are sorta like 2 2A3 triodes in one envelope. Except that they cost $13, rather than $200 for a vintage 2A3.
A fully-balanced 30-watt amp using about a million dollars in tubes.
another 30-watt amp, this time using the very cheap 807 tubes. The 807 is similar to a 6L6, except that the grid connection is on a top cap. 807s can also handle crazy high voltage.a
A schematic for the venerable Langevin 108C, which was apparently a very popular choice for industrial audio distribution in the ’40s.
Another 807-based amp; this one is an RCA Radiotron model 515. This looks like a great circuit. Wish I had kept those 807s i found last year…
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