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Hoppe's Brain

DIY circuit board kits for Adcom and others

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Restoration: now serving #150
* Not affiliated with ADCOM corporation, past or present.

Featured Products

  • Adcom GFA-555 MK1 Input Board $80.00 – $220.00
  • Matched input transistors, 2 pairs $30.00
  • Hoppe's Brain Adcom GFA-535 MK1 Power Supply Board Adcom GFA-535 MK1 Power Supply Kit $140.00
  • Universal Amplifier Soft-Start Power Supply Board $120.00
  • Adcom GFA-555 MK1 and MK2 Soft-Start Power Supply Upgrade Kit $350.00
  • Adcom GFA-565 Replacement Circuit Board (New Version) $80.00 – $380.00

Recent Posts

  • The nicest GFA-555 MK1 I’ve ever built, $1600
  • New Adcom GFA-555 MK1 Input boards!
  • The GFA-565 boards keep getting better
  • (no title)
  • Fully assembled GFA-565 boards back in stock!

Product categories

  • Adcom (6)
  • Amplifier Parts (7)
  • Circuit Boards (6)
  • Power Supply Kits (4)

Recent Comments

Eric from Coast Elec… on New Adcom GFA-555 MK1 Input bo…
hoppesbrain on The GFA-565 boards keep gettin…
Daniel Elmore on The GFA-565 boards keep gettin…
hoppesbrain on The GFA-565 boards keep gettin…
Charles McGee on The GFA-565 boards keep gettin…

Archives

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

Categories

  • Adcom
  • forsale
  • Refurbished
  • Uncategorized

Recent Posts

  • The nicest GFA-555 MK1 I’ve ever built, $1600
  • New Adcom GFA-555 MK1 Input boards!
  • The GFA-565 boards keep getting better
  • (no title)
  • Fully assembled GFA-565 boards back in stock!

Recent Comments

Eric from Coast Elec… on New Adcom GFA-555 MK1 Input bo…
hoppesbrain on The GFA-565 boards keep gettin…
Daniel Elmore on The GFA-565 boards keep gettin…
hoppesbrain on The GFA-565 boards keep gettin…
Charles McGee on The GFA-565 boards keep gettin…

Archives

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

Categories

  • Adcom
  • forsale
  • Refurbished
  • Uncategorized
  • Classic ADCOM Service – Repair and Restoration, Madison, WI
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