NASA releases weird "moon music" heard by astronauts in 1969

Depends on the phase of the mission. The radios would have been tested against each other because Apollo 10 was flown to validate operations prior to 11. To do that you would start docked and then undock with the radios running. It wouldn’t have to be the transmissions interfering with each other. These were big old, noisy radios and probably had beat frequency oscillators which could interfere with each other.

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