Voltcraft 13.8V 2/3A Regulated Power Supply
I recently got this from eBay. The previous owner added an optocoupler that interrupts the current to the control chip, such that the supply can be soft- turned off and on remotely.
I removed this circuitry and restored the supply into its original order, furthermore I replaced the two capacitors since it looked like that unit had quite a runtime over the years.
Furthermore the voltage adjustment potentiometer fall apart, so I replaced that one, too.
SP-606-Z 13.5V 5/7A Regulated Power Supply
This supply was working fine, but the one connector terminal was missing, so I replaced both banana connectors.
Inter-Power 12V 3/5A Regulated Power Supply
This one had multiple issues, the capacitors were all bad to begin with, so I replaced them all. On nominal load the current sense resistor went up to 140C, so I opted to replace it with a higher-powered resistor as well for good measure.
