also older info - The 279.0-MHz frequency
can transmit or receive only among the two EVA astronauts and the
orbiter, not the ground stations.
On Sun, Nov 15, 2020 at 7:20 PM Peter Szerlagi <zerg90@gmail.com> wrote:
>
> older info - All three of the UHF frequencies (296.8 MHz, 259.7
> MHz and 243.0 MHz) are preset in the UHF transmitter and cannot be
> altered by the flight crew.
>
> unknown if these channels are still used
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