Can the WE 407A electron tube be heater phantom powered

It has a Vf=40V. So perhaps with a small series resistor or a bit larger if underheating is required.


Could a Pleiades V6 type front end amplifier be made with both heater and anode voltage supplied by phantom 48V power with the WE 407 electron tube?. (Attention to any voltage, all safety precautions should be strictly followed).


The schematic may look like the following but no Pleiades bias is need as the anode voltage is high enough. So a high Megohm resistor could be connected to gnd or a very very high one to anode? Or using a large dropping resistor to supply low anode voltage and using the Pleiades circuit as it is.






A center tap from the output transformer secondary would receive the phantom power.



But just using a battery supping both heaters and low anode potential may possibly be the best low noise performance from an electron tube.