Hello Jakob,
unfortunately the info as present has no value other than historical for the IRT speced units, what is displayed regarding the tube units are specs that date to approx. 1955 and are more idealist than real. There are several big mistakes due to revisions and DIN changes, so without the proper serial numbers, etc. it has more entertainment value.
The entire "Recording Studio Specs" are not listed or missing...
Most people that have Gotham imports like the EMT equipment, Danner/Eckmiller Faders/Eqs, etc. have factory modified units that need different schematics... And most of all there were several Radio Station specific modules, the SWF were slightly different than the NDR modules, etc....
Also there are huge gaps in accuracy, missing pages and info.
A good start for people trying to learn about german modules but as I said more for general info only...
Best regards,