(1) excellent condition 1.177.230 Record Amplifier Card with Muting Circuit daughter board for Revox B77/PR99 series reel to reel tape machines. This was pulled from a working system and inspected.
The electrolytic caps have been replaced with long-life Panasonic caps.
All trimmers have been replaced
Sold as-is, as-pictured.
Attention - I have more refurbished B77 cards in separate auctions.