[McMurdo]

The entire voice comms tape for Apollo 13 has been uploaded to youtube in several parts. Quite interesting as it includes both flight controllers communications and capcom/spacecraft loops...busy at times but quite understandable.

A regular feature throughout the tape is a request for Fred Haise to keep manually selecting the fore or aft omnidirectional (low gain) antenna, they had problems with the automatic high-gain (auto steering) antenna after the explosion due to the attitude problems and lack of power for computer control. At several points the spacecraft lost all comms including telemetry of course and the tape has several rather long quiet sections until the radio link was reestablished. A backroom controller was assigned to constantly track which antenna was best placed to maintain comms and to predict the changeover points, issuing a capcom request before the link was lost.