

The panel that comes with this kit was rejected for surface scratches or dings. The rest of the kit is identical to the full priced kit. These have very limited availability. If you can add to cart, we have stock!
Traditionally, the Revision F has a black faceplate and looks just like the Revision D. In many cases, original units are confused for Rev C/D/E's with engineers mistakenly thinking of the revision F as a silver faced unit. To give this underrated revision a unique look, we've added a red stripe and red off button cap. Though the Revision F is cleaner than the A or D, it's not dull or boring. In fact, it's the favorite of many at Hairball Audio. It imparts that classic FET compression while adding a glossy, polished sound to the source material. Frankly, it makes everything sound like a better version of itself. A favorite of top engineers, including Bruce Swedien, this is a flavor unique to the predecessors. Like the Revision A and D, the input uses an O-12 transformer and the signal is attenuated at the input with a 600Ω T-pad. The output is class A/B, utilizing a B11184 output transformer.
Interested in a FET/RACK but not into DIY? Check out our list of kit builders.
Not all of the parts needed to complete your build are included in this partial kit. This kit is designed for more advanced builders who are not afraid to source parts, or already have parts in their shop.
Mouser.com Cart Sharing
Mouser.com has a feature that allows us to create a custom shopping cart pre-loaded with most of the additional parts you need. To use this feature, simply click the Mouser cart link below. This will fill your cart with the parts you need for your revision. You can edit your cart and customize it all you like, you will not be altering our saved cart.
FET/RACK Revision F (Latest Version)
Mouser Cart Link | Bill of Materials PDF Download
Mouser.com does not stock the MPSW06 and MPSW56 output transistors. You need one of each. Check Newark or Farnell for them or email us and ask us to toss a set in your kit.
If you'd like to learn more about substitutions for out of stock parts, please have a read through our substitution guide.
Substitution Guide.
Digikey.com may also have stock it Mouser is backordered.
Disclaimer: Lists are not guaranteed to be accurate. We do our best to double and triple check the lists however we update them a lot and do make errors. Hairball Audio, LLC is not responsible for any BOM errors. If you do find an error, please let us know so we can update our BOM's for accuracy.
We got your back! We offer flat rate repair on all of our DIY builds if you get stuck.
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