"A schematic diagram of the module. Component values are from curve-fitting to oscilloscope traces, so they're probably off by at least 10%." As the modules ar

"A schematic diagram of the module. Component values are from curve-fitting to oscilloscope traces, so they're probably off by at least 10%." As the modules are made of discrete components (as opposed to some thin film process) wouldn't it have been better to assume standard values, i.e.: 20k to either 18k or 22k, 4.9k to 4.7k, 155 to 150 ohms, etc. and work backwards from there? Tooling up for such odd values would be a messy business, especially so for such a small quantity (and in that era when jigging up would have been a big effort). Alternatively, standard components may have been used and a SOT (Select on Test) method employed to obtain those specific values (say as is done in 'film terms' matrices where exact values are of critical importance). No doubt this could be determined by opening one of the modules and either measuring them directly or checking the color code bands on the resistors. It's very unlikely that a standard resistor made during that era would not have had the normal color coding and as far as I can recall Motorola never made resistors so it would have had to have purchased them from a manufacturer of same, Allen-Bradley (A-B), Sprague Electric, etc., so it's all the more reason the resistors would have been color-coded. (BTW, please correct me if Motorola did make resistors.) I'm of the generation who remembers those events happening so I find it fascinating. I'd like to monitor how this project eventually unfolds.