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Coil Audio CA 286 preamp module

Modulaire buizen microfoon/lijnversterker en PS6 Preamp Module, een eerbetoon aan de klassieke Europese tweetrapsversterker uit de jaren 50 en 60

CA-286

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Product omschrijving

Coil Audio CA-286

PS6 PREAMP MODULE
Modular Microphone/Line Amplifier

The CA-286 preamp module is a tribute to the classic 1950’s and 60’s European two-stage amplifier made popular by Telefunken™, Langevin™, Collins™, and Gates™. The CA-286 excels in high fidelity recording applications providing the rich, detailed midrange often associated with vintage EF86 tube based preamps. The CA-286 PS6 preamp module uses Coil Audio’s own transformers, high quality capacitors, resistors, and NOS octal tubes and is powered by the Coil Audio PS6 Rack Tray and Power Supply (sold separately).

The Controls

The (INPUT) pad section contains a phase reverse switch, and a 6 position pad network. The first four positions are various 150/250 ohm mic pads; -6db, -12db, and -19db. The final two L1 and L2 allow line-level signals providing tone-shaping capabilities while mixing from your DAW, tape machine, other line level devices – including other preamps.
The (NF) control varies the amount of negative feedback present in the circuit. Counter-clockwise brightens and moves the sound forward while raising harmonics and sensitivity. Turning it clockwise increases negative feedback, producing a darker tone with a smooth, dampened harmonic structure.
The (HIGH) switch transitions from the natural openness of the tubes, to a gentle filtering of upper frequencies.
The (LOW) switch reacts with the NF, boosting or cutting low frequency while moving the low end from front to back in the sound stage.
The (OUTPUT) control knob is placed between the 1st and 2nd stage EF86 tubes and sets the final output level.

Specifications

  • Two-stage EF86/6267 pentode vacuum tube-based circuit.
  • 42db-60db of available gain.
  • Flexible input pad section for mic or line level operation.
  • Transformer balanced. 150 Ohm mic, or 20k Bridging line input, 600 Ohm output.
  • Interchangeable/Optional input and output transformers.
  • NOS tubes, signal caps and resistors, PEC 2W carbon pots.
  • Up to Six CA Series Amplifiers mount into the PS6 Rack.
  • Hand Built and Tested in the USA.

COIL AUDIO TRANSFORMERS

CT-110HN Super-Mu Microphone/Input Transformer
Based on a rare 1950's high fidelity coil. Detail oriented, it adds an excellent top and bottom extension with a smooth, breathy saturation.

CT-41 Line Output (or Input) Transformer
Based on a popular 1960's Peerless design. Frequency response is ruler flat from 20Hz to 30kHz, dipping just below 1db at 60kHz. Its smooth saturation imparts a rich, wooly, high fidelity sound to anything passing through it.

CA-286 Installation Guide & Operating Manual

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