[R-390] R-390A

[Larry H]

Hi Thomas,  The label on mine says 220 W, but that's with the heaters on.  At 115 vac that's about 1.95 amps, but they usually draw a little less than that.   With the vfo ovens off, about 140 watts.  You should not need them on unless your operating temp is very cold.  The switch is on the back.  The thermostat has a habit of sticking on and ruining the vfo.
For the audio, check the links on the back.
Did you replace the killer cap, c553?  If not, do so asap.
Enjoy.

Regards, Larry