Chinese company Cayin have a business policy of not supplying circuit diagrams even to suppliers in various countries .
If anybody finds a source there are plenty of Cayin customers looking for circuit diagrams.
Tube preamps aren't that complicated especially twin triode tubes somebody could talk you through it.
If anybody finds a source there are plenty of Cayin customers looking for circuit diagrams.
Tube preamps aren't that complicated especially twin triode tubes somebody could talk you through it.