Another NBTV 32 line receiver build link with a lot of written discussion by LabGuysworld (Richard N. Diehl) on youtube. He goes into a lot of detail in the design and construction of a mechanical TV receiver. He includes build info for either B/W or color.
LabGuy's World: NBTV - 32 Line BIG Televisor Project
https://labguysworld.com/NBTV_BigTelevisor_001.htm