It's really cool to design all those NOR gates using thermionic valves, as shown in the schematics in the middle of the article. I just wonder if using two regu

It's really cool to design all those NOR gates using thermionic valves, as shown in the schematics in the middle of the article. I just wonder if using two regular diodes in the input paths of each NOR gate and another diode in the output path is a little bit of "cheating", since diodes are somewhat newer technology than thermionic valves.