[Elecraft] Running low power (supply)

[Bob Lewis (AA4PB)]

> could I get away with using a small power supply
> (say 750mA) which supplies just enough current to charge
> the battery and run the rig in receive mode?

No, with the K2 circuit as designed as soon as the battery voltage
drops below the supply voltage then the whole transmit current will be
taken from the supply. The supply will be overloaded if it is rated at
less than the required transmit current.