I have 2 pairs of gyrator boards for sale. They are fully functional ( I tested all of them in a 6e5p driver at 200 Vpeak to peak) and stuffed with my best selection of components:
All about electronic valves and hi-fi
I have 2 pairs of gyrator boards for sale. They are fully functional ( I tested all of them in a 6e5p driver at 200 Vpeak to peak) and stuffed with my best selection of components: