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Month: April 2019

New Adcom GFA-555 MK1 Input boards!

Posted on April 26, 2019 by hoppesbrain

By popular demand, I have created new input circuit boards for the GFA-555 MK1! These boards integrate all of the improvements I normally make when I refurbish a GFA-555.

Buy one here.

Continue reading New Adcom GFA-555 MK1 Input boards!

Posted in Uncategorized1 Comment
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!

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Frank Fisher on Hoppe’s Brain Coronaviru…
hoppesbrain on Yet another variation of the A…
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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

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Categories

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  • Classic ADCOM Service – Repair and Restoration, Madison, WI
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