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Month: April 2019

New Adcom GFA-555 MK1 Input boards!

Posted on April 26, 2019January 17, 2022 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
* Not affiliated with ADCOM corporation, past or present.

Featured Products

  • BFA-565 Power Supply for Adcom GFA-565 $160.00
  • EBFA-565 Replacement Circuit Board for Adcom GFA-565 $80.00 – $400.00
  • BFA-555 Smart Soft-Start Power Supply for the Adcom GFA-555 $220.00 – $340.00
  • BFA-555 MK2 Input board for ADCOM GFA-555 MK2 $80.00 – $400.00
  • BFA-555 MK1 Input Board for Adcom GFA-555 MK1 $80.00 – $380.00
  • Matched input transistors, 2 pairs KSC1845 $20.00
  • BFA-535 Power Supply for Adcom GFA-535 MK1 $140.00

Recent Posts

  • How not to lose your 1/4″ to 1/8″ headphone adapter.
  • Replacement 1/4″ phone jacks for DBX compressors, EQs, vocal processors, etc…
  • A few pictures of a GFA-555 MKI without “The Works”
  • Interesting phenomena visualized. High voltage attracts dust!
  • Galaxy Audio GPS-8 Mini review and tear-down.

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Recent Posts

  • How not to lose your 1/4″ to 1/8″ headphone adapter.
  • Replacement 1/4″ phone jacks for DBX compressors, EQs, vocal processors, etc…
  • A few pictures of a GFA-555 MKI without “The Works”
  • Interesting phenomena visualized. High voltage attracts dust!
  • Galaxy Audio GPS-8 Mini review and tear-down.

Recent Comments

Steve Rothermel on How not to lose your 1/4…
hoppesbrain on How not to lose your 1/4…
Tyler on How not to lose your 1/4…
hoppesbrain on A fun project: Adcom GFA-535 S…
Patrick Lenehan on A fun project: Adcom GFA-535 S…

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