DL9RNV pisze:

To nie przekonanie, to oficjalne dane producenta.

"FT-891 HF+50Mhz ALL MODE MOBILE TRANSCEIVER

Supply Voltage: 13.8VDC +/- 15%, negative ground
Current Consumption: Rx: 2.0 A (Signal Present) Tx: 23 A
Operating Tempature Range: 14 °F to ° +122 °F (-10 °C to +50 °C)..."