Modulus Digital AM/FM Stereo/Quadraphonic Tuner/Preamplifier AN-2016

• alternative name: Heath Company

The Heathkit AN-2016, also known as the Heathkit Modulus Control Center, is a vintage quadraphonic (4-channel) preamp and tuner system released in the mid-1970s.

The AN-2016 Digital Tuner/Preamplifier puts you incommand of your musical environment. With its matching amplifier and optional plug-in modules you can 'custom design ' a music system to satisfy your every listening need.                                            The tuner section of the AN-2016 is one of the most technically advanced on the market. Four 1/2" tall LED's display the broadcast frequency far more accurately than a conventional tuning dial. TWO tuning meters: signal-strength for AM and FM, and center channel for FM give you outstanding tuning precision.
A phase-locked loop stereo multiplex circuit assures wide FM stereo separation of 40 dB at 1000 Hz. Even the AM section features dual-gate MOSFET's, a nine pole LC filter and static-shielded loop antenna for AM reception that's real hi-fi quality.                                The preamplifier section of the AN-2016 has overload characteristics and freedom from distortion that allow superb sound reproduction from any program source. On high-level inputs, the AN-2016 reaches full output with a signal of 170 mV, yet it doesn't overload until 5 volts. The phono amplifier can be driven to full output with as little as 2 mV, but does not overload until the input reaches 60 mV. Has peak-responding output meters for each channel. The music system designed to change with your changing needs nel, full bass, treble and balance controls, lighted function push buttons, more. Make the Modulus the "heart" of your custom music system.

Complexity and Assembly:
The AN-2016 was one of Heathkit's most complex consumer kits. Expert reviewers from ImageArchive noted the following: 
Assembly Time: A highly experienced builder required approximately 42 hours for the basic unit, plus another 6 hours for accessory boards. 
Difficulty: Heathkit recommended that builders have prior kit-building experience due to the high component density, though the manuals were praised for being exceptionally detailed with illustrations on nearly every page.

Here you find 775 models, 758 with images and 515 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Heathkit (Brand), Heath Co.; Benton Harbor (MI)