Voyager transmitters are in 10 watt range. On 2 and 8 GHz bands. Lots of interesting reading, for those so inclined, at https://descanso.jpl.nasa.gov/DPSummary

Voyager transmitters are in 10 watt range. On 2 and 8 GHz bands. Lots of interesting reading, for those so inclined, at https://descanso.jpl.nasa.gov/DPSummary/Descanso4--Voyager_new.pdf https://descanso.jpl.nasa.gov/DPSummary/Descanso4--Voyager_n...