Battery Based Power Supply
I may test this circuit (or a similar circuit) using lithium battery packs (no grid availability) of plus/minus 48VDC. It seems that I would need to retain the regulator circuitry of the Fig. 8 power supply. The battery pack may have an internal resistance of about 300 milliohms. If the power supply capacitors have lower ESR than the battery pack then I imagine I should retain the entire LCRC network? Or just the capacitors?
I may test this circuit (or a similar circuit) using lithium battery packs (no grid availability) of plus/minus 48VDC. It seems that I would need to retain the regulator circuitry of the Fig. 8 power supply. The battery pack may have an internal resistance of about 300 milliohms. If the power supply capacitors have lower ESR than the battery pack then I imagine I should retain the entire LCRC network? Or just the capacitors?
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no need for reg with litiums , but 48Vdc rails are damn high
read F5 Turbo article , to grasp how to cascode input JFets , to keep them safe and sound
also , whatever rails are , with F5-like construction , I wouldn't go bellow 1A Iq , because with lower Iq THD is rising
so - plenty of heat , but A class envelope is small
frankly , with batteries , and especially that high rails , I wouldn't bother with A Class
read F5 Turbo article , to grasp how to cascode input JFets , to keep them safe and sound
also , whatever rails are , with F5-like construction , I wouldn't go bellow 1A Iq , because with lower Iq THD is rising
so - plenty of heat , but A class envelope is small
frankly , with batteries , and especially that high rails , I wouldn't bother with A Class
Thank you again. Perhaps the lithium battery management takes the place of the regulator. Or perhaps I should give up efficiency, build an amplifier with a traditional power supply, and power it from the inverter. Save me from lugging batteries around in my long past grey haired stature. I have read the F5 Turbo article, but I must study it. Or bag the whole project, buy another HPA-1/XA25 and configure one heck of a storage facility. What a 1 KW solar array can't handle can be finished up by the propane generator. I can't take it with me. I need to reach a compromise between the slide rule and the soldering iron. You have been greatly encouraging. Much appreciated.
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use these rails , but choose an amp which will work and sound nice with shallow A class
why wasting energy in that special case ?
or , if you have it plenty , use switching step down converters , to go down to 24-ish rails and make any of regular FW format amps
or choose one having single 48V rail (cap coupled , yes)
or accommodate one with originally dual rails - to use one 48Vdc rail
plenty of possible choices
why wasting energy in that special case ?
or , if you have it plenty , use switching step down converters , to go down to 24-ish rails and make any of regular FW format amps
or choose one having single 48V rail (cap coupled , yes)
or accommodate one with originally dual rails - to use one 48Vdc rail
plenty of possible choices
Again, thank you. I am beginning to grasp the parameters. The reason for 48VDC is that the inverter is based on a 48 volt bank. But I could series two portable 24VDC packs and lug them into the cabin at night. I have much to work through. For now, the cabin is not accessible due to snow. Probably not until April/May. I have some time to gather my thoughts.
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