You really need to check the output of these power supplies with a scope. I'm a cellular systems engineer at AT&T and our -48 volt charger outputs are really dirty. We have additional filtering installed at the radio equipment end of the power circuit to clean it up. In addition we only sell as used the units that took lightning strikes or have severe voltage drops at high current outputs.
John Norris K1CAG
On Thursday, October 22, 2020, 05:24:55 AM CDT, Karl Heinz Kremer, K5KHK <khk@...> wrote:
What would I search for if I am looking for these power supplies??