Electronics > Beginners
Celltower Power Supply
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LaserTazerPhaser:
Whats the typical working voltage of  power amp stages in typical urban celltowers along with the type of supply used for turning mains into DC?
ArthurDent:
I'm at a total loss as to why just anyone would need, or want, to know that information. Perhaps giving us a little more information of what you are trying to do might help.
MagicSmoker:
Many cell sites use -48V, same as POTS (Plain Old Telephone Service). This is both because the MOSFETs in many RF PAs (power amplifiers) are designed for 48V operation, and telephone ESS (electronic switching systems) have traditionally been designed for 48V as well.

TheHolyHorse:

--- Quote from: ArthurDent on September 07, 2019, 07:23:23 pm ---I'm at a total loss as to why just anyone would need, or want, to know that information. Perhaps giving us a little more information of what you are trying to do might help.

--- End quote ---

Maybe he's building his own cell tower, because why not  :P
LaserTazerPhaser:
Was considering they might have used swiching regulators to step down the voltage or cap droppers to power the amps.

Are the amps cooled with forced convection or do they simply run the power semis well below their derating values?
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