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Hoppe's Brain

DIY circuit board kits for Adcom and DIY Amplifiers

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* Not affiliated with ADCOM corporation, past or present.

Featured Products

  • BFA-555 Smart Soft-Start Power Supply for the Adcom GFA-555 $220.00 – $340.00
  • Adcom GFA-555 MK1 Input Board $80.00 – $360.00
  • Matched input transistors, 2 pairs KSC1845 $30.00
  • Adcom GFA-535 MK1 Power Supply Kit $140.00
  • Adcom GFA-565 Replacement Circuit Board $80.00 – $380.00

Recent Posts

  • Another tour of a Hoppe’s Brain Adcom GFA-555 restoration (5 years later with better technology.)
  • Cool new product! ‘Add-A-Buffer’ adapter boards (Your op-amp + TI BUF634A in a DIP-8 socket)
  • Most built-and-tested boards now in stock!
  • New Product! Earth-Loop Breaker Boards
  • New policy at Hoppe’s Brain: I’m going to start actually billing for my time. :)

Product categories

  • Adcom (7)
  • Amplifier Parts (7)
  • Circuit Boards (5)
  • Power Supply Kits (3)

Recent Comments

ROB M on Adcom GCA-510, Minimalist inte…
Andrew Bernbaum on New policy at Hoppe’s Br…
Win Rice on New policy at Hoppe’s Br…
John Coutcher on New policy at Hoppe’s Br…
JEFFREY A YOGURTIAN on New policy at Hoppe’s Br…

Archives

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Categories

  • Adcom
  • forsale
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  • Uncategorized

Recent Posts

  • Another tour of a Hoppe’s Brain Adcom GFA-555 restoration (5 years later with better technology.)
  • Cool new product! ‘Add-A-Buffer’ adapter boards (Your op-amp + TI BUF634A in a DIP-8 socket)
  • Most built-and-tested boards now in stock!
  • New Product! Earth-Loop Breaker Boards
  • New policy at Hoppe’s Brain: I’m going to start actually billing for my time. :)

Recent Comments

ROB M on Adcom GCA-510, Minimalist inte…
Andrew Bernbaum on New policy at Hoppe’s Br…
Win Rice on New policy at Hoppe’s Br…
John Coutcher on New policy at Hoppe’s Br…
JEFFREY A YOGURTIAN on New policy at Hoppe’s Br…

Archives

  • September 2022
  • May 2022
  • April 2022
  • February 2022
  • December 2021
  • June 2021
  • January 2021
  • August 2020
  • July 2020
  • March 2020
  • February 2020
  • January 2020
  • November 2019
  • September 2019
  • August 2019
  • June 2019
  • April 2019
  • February 2019
  • January 2019
  • October 2018
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  • May 2018
  • February 2018
  • December 2017
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  • August 2017
  • June 2017
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  • February 2017
  • November 2016
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  • May 2016
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  • February 2016
  • January 2016
  • October 2015
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Categories

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