Reichelt had the KA3005D on sale for 55 EUR last Friday, so I bought one.
I was a little concerned to see that it has the silly old M5 memory slot instead of a LOCK indicator, but despite this it seems to be a recent build.
Some impressions:
The power transistors are a pair of Toshiba 2SC5198's, which should be easily up to the task. I wonder what type the old ones were.
The fan sounds like it is decent quality but it's quite loud because of chassis turbulence and being run unnecessarily fast. Maybe I'll just add a series resistor as the exiting air isn't too warm even when the power supply is at maximum thermal load.
General soldering quality is good, but the hand-inserted components are all just thrown in rather carelessly. In my case, the overload thermistor had its leads shorted and it also wasn't really pressed up against the heat sink.
The three large caps marked Rubycon may look okay in the picture, but they feel very rough to the touch and unlike real Rubycons, so I suspect that they are instead "con rubies".
The 7812 on the controller board has a tall heat sink that is only attached to the regulator and doesn't even rest against the PCB. Extremely wobbly to the point where I'm a bit surprised that it didn't break off during transport.
No overshoot! Discharging the output cap takes half a second with no load.
Calibration is easy and works fairly well. There's some drift, but that's okay. I didn't expect this to be a precision product.
Pressing the mechanical power switch to turn the power supply on causes a fairly strong burst of noise which doesn't appear if the switch is left on and the IEC cable inserted instead. Having read about previous runs of this PSU in the 120V version, which had lots of problems with the power switch, I wonder if they are still using that same weak switch in the 230V product and if it might be underspecified even there, causing arcing. It's also only a single pole switch.