Having repaired a lot of Studer and Revox Tape machines - I realised that the Hybrid A101 Op Amp Chip is used extensively.
Searching the Internet has proven fruitless to purchase replacement units - so I decided to manufacture a replacement Clone unit.
Gone are the flimsy wire ends - replaced by 2 rows of sill connectors. Gone is the dreaded Tantalum capacitor - replaced by a mini 50V electrolytic - more reliable and less noisy.