These are extra PCB's for a active ABY switcher. They fit in a 1590BB. It has transformer isolated outputs along with ground lifts on each output. There is also a phase inversion
switch. All the parts are easy to find. This project is an excellent design, quiet, and extremely useful.
This is for the unpopulated PCB only. All other pictures shown are soley for reference.
4.30 x 2.39 inch (109.2 x 60.7 mm) 2 layer board.
Below you can download the parts list and we can help you locate any parts needed or any assembly questions.
The project we built had the ground lift and phase switches under the in/out jacks but you can put them wherever you can fit them.