The Royal line of effects was made in Tokyo, Japan in the early 70s by Thunder Electronics. Not much is known about the company but they had some own designs in their portifolio along with the casual Shin Ei superfuzz clone.
Royal RC-1 Effect Machine was an inductorless wah which topology was based on fuzz face and a twin notch filter. It is not the most powerful or vocal wah but it does a decent job after a superfuzz just like in Royal RFC-1 Double Effect Machine.
The layout and schematic is verified.
