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Analogue Tube AT-101 Fairchild 670 Stereo Mastering Compressor Limiter

£18,528.00 inc. vat
£15,440.00 ex. vat
Please contact us for availability.

Analogue Tube AT-101

The Analogue Tube AT-101 is a faithful recreation of the original Fairchild 670 stereo limiter. The AT-101 is built using traditional point-to-point wiring methods and standard turret component mounts. The audio path and power supply are completely free from any printed circuit boards.

The AT-101 like the original Fairchild 670 has been assembled completely by hand and uses high quality modern components. The tube complement is exactly the same using a new generation 6386 remote cut-off triode developed to replace the original 50 year old tube types many of which were used in the Fairchild 670.


  • Original 1db per step ‘T’ Attenuators (21 step total)
  • Original complement of tubes
  • Fully transformer balanced audio path
  • Newly developed 6386 Triode tubes– new feature
  • Visual temperature indication
  • 5 &12 Watt Non-Inductive Wire-Wound resistors throughout Audio Path
  • Original Non-Inductive Pots throughout
  • Original Anode supply
  • Original CVT heater supply
  • Hovland Musicap Polypropylene film capacitors throughout
  • Silver Mica capacitors
  • All Teflon ‘Point to Point’ wiring throughout
  • Ceramic Tube sockets throughout
  • Stereo Link switch fitted
  • Over temperature electronics
  • Simpson Electric metering
  • Top and bottom panel torque hinges
  • Original front panel
  • New Chassis Design
  • Large Knobs
  • XLR Chassis mounting connectors
  • Specially made Sowter audio transformers throughout
  • Switched IEC mains socket
  • US & EUK adjustable