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Hoppe's Brain

DIY circuit board kits for Adcom amplifiers

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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 – $360.00
  • 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 $80.00 – $380.00

Recent Posts

  • Hoppe’s Brain Coronavirus Pandemic Statement.
  • New Product: “Capacitor Hats” for large screw-terminal electrolytic capacitors.
  • **SOLD** Pair of fully restored ADCOM GFA-565 Monoblock amplifiers $2600
  • New product! Input Boards for 1985 vintage Adcom GFA-555’s
  • Yet another variation of the Adcom GFA-555 discovered in the wild!

Product categories

  • Adcom (7)
  • Amplifier Parts (8)
  • Circuit Boards (7)
  • Power Supply Kits (5)

Recent Comments

Frank Fisher on Hoppe’s Brain Coronaviru…
hoppesbrain on Yet another variation of the A…
Nelson Pass on Yet another variation of the A…
Edward Verlie on GFA-555 MK1 “VERTICAL…
Eric from Coast Elec… on New Adcom GFA-555 MK1 Input bo…

Archives

  • March 2020
  • February 2020
  • January 2020
  • November 2019
  • September 2019
  • August 2019
  • 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

  • Hoppe’s Brain Coronavirus Pandemic Statement.
  • New Product: “Capacitor Hats” for large screw-terminal electrolytic capacitors.
  • **SOLD** Pair of fully restored ADCOM GFA-565 Monoblock amplifiers $2600
  • New product! Input Boards for 1985 vintage Adcom GFA-555’s
  • Yet another variation of the Adcom GFA-555 discovered in the wild!

Recent Comments

Frank Fisher on Hoppe’s Brain Coronaviru…
hoppesbrain on Yet another variation of the A…
Nelson Pass on Yet another variation of the A…
Edward Verlie on GFA-555 MK1 “VERTICAL…
Eric from Coast Elec… on New Adcom GFA-555 MK1 Input bo…

Archives

  • March 2020
  • February 2020
  • January 2020
  • November 2019
  • September 2019
  • August 2019
  • 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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