Bench power supply?

[Maximilian Hohmann]

Hello!

(05-27-2020 07:03 PM)David Hayden Wrote:  ... repair/upgrade projects ...

If you can repair calculators, then you can easily repair power supplies :-) I bought one like these (Iso-Tech ips2303) - first google result: https://www.abex.co.uk/esales/test/iso-t.../index.php as "defective" from eBay for less than 20 Euros including shipping. All that was broken was a diode for 20 Cents. Took less then half an hour to find the fault and fix it. The original price must have been something like 200 Euros and even at that price the unit is not expensive.

I like that power supply very much. It is not a switching type but instead uses heavy tranformers with several taps and linear voltage/current regulators. When you increase the voltage you can hear the clicking of variuos relays that select the approriate transformer windings. The two channels can either be used separately or in parallel or series, thereby giving you up to 60V or 6A. Plenty for my need. Additionally there is a completely separate 5V supply which is, as I must confess, the one I use most often.

Regards
Max