FET/RACK Revision A
Complete DIY Kit


Message About Price Increases

The Blue Stripe

Often referred to as a “Blue Stripe”. These units were the first commercial revision and have a silver panel with a distinctive blue stripe over the VU meter. The signal and line amp are based on the 1108 mic pre and use a FET as the first active component in each amp stage (all other revisions use a bipolar transistor). The gain reduction FET in this model has a unique circuitry around it, different from all other models (notably the lack of source resistor). This results in a little more distortion that helps define the “Blue Stripe” sound. This revision also has a slightly lower threshold in comparison to later revisions (about 5db) and more gain in the amplification stages (about 5db) than the Rev D. This revision is rare, limited to less than 1000 units, and are highly sought after by many engineers and producers.

Interested in a FET/RACK but not into DIY? Check out our list of kit builders

Recommended for intermediate builders.
  • All the parts needed to complete the build
  • Revision A (v1.12) PCBs designed by MNATS 
  • Clear chem-film front panel made in Seattle, USA
  • Custom 18 gauge steel zinc plated enclosure made in Seattle, USA
  • Custom Ed Anderson O-12 reproduction input transformer made in the USA
  • Custom Ed Anderson 5002 reproduction output transformer made in the USA
  • Custom Ed Anderson 11754 reproduction power transformer made in the USA
  • Custom BI Technologies T-Pad input attenuator
  • Interlocking push button switches with “All Buttons In” mode
  • Fully discrete audio path including capacitors selected by ear from Cornell Dubilier (Orange Drop), Kemet, Nichicon, Panasonic, Vishay, United Chemi-Con and Elna
  • Bourns trim pots
  • Neutrik XLR connectors
  • JST connectors and pre-assembled wire harnesses
  • 120/240 voltage select switch
  • 1% metal film resistors
  • Matched FETs
  • Authentic control knobs


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