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The gar2520 DOA PCB is the printed circuit board only, that is required to complete the gar2520 Discrete Operational Amplifier build. This board has been designed by Gary Barnett of Barnett Industries. Gary has built upon the reverse engineering work of Peter Lazaro, better know as “Peter Purpose”. This DOA is a nine transistor amplifier modeled after API’s legendary, mid ‘70’s, Studio Systems/Huntington era 2520. The gar2520 sounds absolutely fantastic in our VP25, VP26 and VP312 microphone preamplifiers. Sonically, it’s hair-splittingly close to a vintage Huntington 2520 which is amazing if you consider the “modern component” phenomenon. Some of the applications the gar2520 DOA can be used for: Microphone Preamplifiers Line or Booster Amplifiers Lossless Combining Amplifiers Balanced Transformerless Amplifiers Equalizers and Compressors Additional features and specs: Industry standard 2520 footprint for plug-in or PC mount connections Low noise, high power output Low distortion Minimum load impedance is 75 ohms for full output voltage Power supply voltage is bi-polar +/- 12 VDC to +/- 20 VDC A complete PDF assembly guide including BOM will be provided via email after purchase It should be noted that all 9 transistors are currently in production and easily obtainable gar2520 Full Kit Bundles including the PCB, are also available ***Please note: This item is a raw, unpopulated PCB only. All other components in pictures are for informational purposes only. This assembly is not for the beginner. Good assembly and solder skills are a must!

PCB Bottom

Bird's eye stuffed

Front angle

4 DOA's on an ACA

121 V-scored DOA's

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