Solar DC power supply for anode circuits, heaters, transistor amplifiers etc

At your risk. All safety precautions should be strictly followed. Any voltage or current can be very dangerous.


While supplying power to the Pleiades DL33 single ended class A (electrons flowing all the time) electron tube music power amplifier, the inverter supplying 230V ac sinewave blew.


It may be frustrating but it is somewhat illogical too. Where to get now 40V DC or 90V DC or whatever?


Problems have the answer embedded in themselves.


DC have been there all the time. Solar panels can easily give 24V, 48V or more when connected in series.


This was realized while reading the inverter Wikipedia article:
https://en.m.wikipedia.org/wiki/Power_inverter


So maybe the best inverter is no inverter.


The best PSU (converting from 230V ac to DC) is no psu.


Sun, our Sun rising every day, is giving the most steady DC energy.


All might be needed is connecting solar cells (through a circuit of over voltage protection, safety fuses etc) directly to electro tubes, transistors etc.


Or using the DC voltage to charge (through suitable battery chargers) 12V batteries, 90V batteries or whatever.


The best sound is from batteries anyway. Almost infinite bandwidth (DC from off to on or a step function has infinite bandwidth). So quiet. No push pull (in audio amplifiers for example) needed to cancel the noise of the rectifier power supply etc.


So perhaps a new protocol at a home or a lab? One problem is that DC may be more dangerous.


There must be great ways to arrange safety. After all DC could be limited to 48V (phantom power level). 48V may be dangerous too.