I finally found time to gather all of them and have a family picture. I know it says favourite and most used but I have many power supplies but non really fit the bill, so I switch between them depending on the projects I am working on.
The Kenwood PAR20-4H is the most used and it has 3 preset memory voltages and lots of function, I love the output on/off toggle switch on this. It also has incredible precision current adjustment down to 0.1mA and also front connection for remote sensing. Rotary encoder knob is very cool to control fine tune or coarse and nothing to wear out! Quite easy to use without the manual. The only problem is the 20V output limit. It has small vent holes all over the case welcome the collection of dust so annual maintenance is required. The massive transformer can be configured from input 100 to 240V. It is also very heavy at 8Kg.
The Kikusui PMC18-2A has a very small form factor, it is very short length suitable for small benches. Output on/off toggle is great. It hums happily at 60% load. Similar to the Kenwood the mains transformer can be rewired for various parts of the world. I would recommend this power supply if you only need less than 2A, it is easily available used, Made in Japan. The Kenwood replace the portable Kikusui on most occasions.
HP E3610A, this is my first commercial power supply, the cover melted when I tried to bake it after cleaning silly me... It's a very simple power supply, easy learn from and understand the inner workings. Very robust power supply lasted me for a long time. Replaced by E3615A due to limited wattage.
HP E3615A, similar to the E3610A except it is longer and heavier. No output on/off toggle, not good enough.
Philips PM2811, lots of features I don't need. I use this when I need high voltage, it goes up to 60V 5A. Illuminated LCD display, output on/off toggle, GPIB Output connection from rear screw terminals, no banana jacks, noisy fan.
All of them are linear power supply except the Philips SMPS with noisy fan
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