Technisphere Corp. Color "Technically." Technisphere's color conversions for 1/2-inch black and white VTR's. Front page: stacked like dominoes, these modifications for VTR's are sold as color-pack modifications for their own units or complete VTR with color adapter packages. Adapter modifications are available for the following models: Sony AV-3600, 3650, Panasonic NV-3010, 3020, 3020SD, JVC KV-360, Shibaden SV-510, 510D, 512, Sanyo VTR-1200, 1350, and under the Special TC Pkg. Sony's AV-3400. The average cost for said modifications is between $650-750.