Hoppe’s Brain Shop
DIY circuit board kits for Adcom amplifiers and other goodies.
Note: Fully assembled boards are usually out of stock, but they are built-to-order in less than 15 days.
Showing 17–23 of 23 results
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Earth-Loop Breaker Board
$25.00 Add to cart -
Matched input transistors, 2 pairs KSC1845
$20.00 Add to cart -
“Capacitor Hats” for Large Aluminum Electrolytic Capacitors
$25.00 Select options -
BFA-555 MK1 VERTICAL Input Board for ADCOM GFA-555 MK1
$80.00 – $380.00 Select options -
M3 and #4 Spacer Kit for Transistor Adapters
$4.00 Add to cart -
M3.5 and #6 Spacer Kit for Transistor Adapters
$4.00 Add to cart -
GFA-585 Cable Assembly Kit
$40.00 Add to cart