Hardware design issue

Author	Message
Volhout Guru Joined: 05/03/2018 Location: Netherlands Posts: 5994	Posted: 10:55am 05 Dec 2024       Mick, I understand why. With AC input the transformer also works as a filter, and typically all you get is 50Hz/100Hz hum. Easy to workaround. Switchmode power supplied (even when switching at frequencies above 20kHz) can output audio band modulation depending on the load (cycle skip at low load) similar to the pico power supply. And typically transformers have a very loooooong lifetime. I just look at my 65 year old Philips PE4801 power supply, or my 50 year old grundig clock radio. Still have to find a switchmode power supply that comes close. My 30yr old Phillips PM3394 oscilloscope comes close though.. Volhout Edited 2024-12-05 20:57 by Volhout