The list of nRF51822 hw revisions (build code) and matching baluns are not updated, and it is simply NOT POSSIBLE to figure out which baluns that match the nRF51 hw revisions. None of the datasheets are up to date.
Could you please make a complete list of nRF51822 revisions (build codes) and which baluns that match.
List of baluns www.nordicsemi.com/.../nRF51822