Total posts : 45366
You raise an interesting and good point. The devices I described are not FCC certified. They are supplied as modular components intended to be used in equipment which, if marketed, would need to be certified as a complete unit.
As supplied, these units will not function without the addition of components (power supply, antenna, frequency selector switch, power supply filtering components, audio conditioning, and mechanical support and enclosure for examples) thus they could be considered as components rather than functioning transmitter and receiver. They are also not intended to be kits since none of these outboard components is supplied.
The argument could go either way, but it appears that my assemblies are home designed and built as is permitted by the FCC part 15 rules. If one feels that this is in a gray area and is not comfortable with this interpretation then it would be best not to use the units.