The Altec Model 438A
Compressor Amplifier (1960)
This Operating Instructions booklet is available as a PDF for downloading in two resolutions, both of which are formatted for 8½ × 11 inches. The high-resolution version is best if you intend to print the book with sharp detail. Download links are at the bottom of this page. Here is what you will get:
Download the 12 MB high-rez Operating Instructions.
Download the 540 KB low-rez Operating Instructions.
The high-resolution version is best for printing.