That's right Alex. However my primary concern expressed in my original email was truncated...I would not consider schemes that directly rectify the mains to provide the DC supply rail to a QRO MOSFET
Why? The TV industry and the American radio industry has been doing it for tens of years! You don't have any qualms about using a transformer coupled power supply, but you shrink when considering a t
Well Alex an amateur / ham could consider doing such an abominable thing in a home brew project, but directly rectifying the AC mains would never pass regulatory approval for commercial equipment sal
You need to ensure that the neutral is not earthed at any time by the amplifier, too. Safety requirements would dictate double insulation. As Leigh says the myriad legal requirements for commercially
ORIGINAL MESSAGE: (may be snipped) REPLY: Another nice coincidence is that a 50 ohm dummy load can be used to test the power supply. Remember of course that both sides of the coax and dummy load are
I can in principle concur with your 3 salient points here Manfred. However, as I said in a recent post an amateur / ham could consider doing such an abominable thing in a one-off homebrew project; bu
In some countries, connecting the neutral to an outside earth could be extremely dangerous, leading to fires or even electrocution. Where a Protective Multiple Earth system is used, a ruptured neutra
ORIGINAL MESSAGE: (may be snipped) REPLY: The requisite isolation would be achieved by transformers - toroids on both the input and output to the transistors. There's your isolation. And there are AC
NO,NO,NO!! The rectified line- rectified and filtered , that is- does not go to the chassis!!!! Ever wonder why AC/DC radios were built in a Bakelite case? It was because the radio chassis inside was
I can in principle concur with your 3 salient points here Manfred. However, as I said in a recent post an amateur / ham could consider doing such an abominable thing in a one-off homebrew project; bu