Transmissions to/from Earhart were possible on both voice and Key (morse),weather info was always via Key - not sure if weather also on voice ?
It was an HF radio (High Frequency) so reception and transmission distances could vary enormously with weather and (say) altitude.
The full (?) transcripts are available online at......
https://earchives.lib.purdue.edu/dig...arhart/id/3052
Gets interesting at page 041 but there is some important info on pages prior to that.
Edit - I forgot to say that one of the important infos was that Earhart apparently was not informed that the Navy had an HF 'Homer' Beacon on Howland specifically for her to use for navigation.
I have just skimmed through a few pages and appears that 'Tare','Victor' and 'Queen' used as phonetics