This a nice unit. It does have some more recent updates that the original did not have.
The unit has gold contact rocker switches which replaced the original somewhat troublesome switches that only showed up as they age and were never used to keep their contacts clean. These switches eliminate this issue. Sorry, they are no longer available.
This unit also has a regulated B+ supply along with regulated heater supplies. This was a major improvement over the original.
With phono circuits, and in obviously good condition, this is a good deal for a really nice performing and reliable all vacuum tube preamp.
Regards,
Frank Van Alstine
