Wow Frank, so many issues with these legacy blocks! I am surprised and disappointed that the quality control was so poor with changed components, missing components, and incorrect labeling. Are the three or four I gave you all mismarked and/or incomplete?
The amplifier block was continued by LectronRWO, I wonder what their version of the block is like. I should have one in my storage area.
Thank you for your research and updates! I wonder who many other multi component blocks have issues 😥