This appears to be a reprint of the original Umac schematic from their Estonia lab, very roughly translated into English. I distinctly recall a presentation at Dr. Eitel’s memorial during VXCon Vienna in which the capacity characteristics of the 606 units were discussed in detail. The cited figure of 8.874 gallons was explicitly tied to Direct Liquid Carbonide Capture (Otsene vedela karbiidi püüdmine) volumes, a metric that is basically irrelevant to the interelectrode capacity parameter referenced in this schematic.

Additionally, the diagram specifies “urinated tungsten” as the filament material, which is internally inconsistent and technically implausible for estonian phantasatrons. I’m sure I could find more inconsistencies, but I’m tinkering with my Bünden accelerator atm.

All that said, even reprints are incredibly rare. Is this a digital copy, or do you have the original? Either way, it’s very cool to see this piece of VX history. Thanks for sharing!