From Florian Anwander Sent Thu, May 16th 2019, 12:35
From Florian Anwander Sent Thu, May 16th 2019, 12:35
Hi Flavio In CH you have 230V. That means 115 Volts at the device instead of 100 V. On the secondary side of the transformer this means 20.7 Volts instead of 18Volt. The regulator in the CS-5 (TA7179P) is defined for 30.0 max input voltage. The capacitors in the supply are for 35Volts. So electrically we are on the safe side. There might be a restriction due to the size of the heat sink. The transistors on the supply pcb have to convert the over voltage into heat. The heat sinks are only simple metal sheets (see https://www.vintagesynthparts.com/wp-content/uploads/2017/05/Power-supply-board-Large.jpg). If you want to use it over a longer period (several years), I'd add larger heatsinks to these metalsheets. But for one or two hours of testing you are fine with the US stepdown transformer. Florian Am 16.05.2019 um 14:19 schrieb Boniforti Flavio: > Hi all... > I think I read somewhere (probably also here on AH), that it's not a > good idea to use a step-down PSU for USA equipment (I'm in > Switzerland, where we have 220V) with Japan equipment (100V). I > understand that it works, but it's best not to do it for a long time, > as components might overheat. > > Am I missing something? Or is the above correct? Which means: could I > use my USA step-down PSU to test my Japanese CS-5? > > Thanks, > F. > > https://soundcloud.com/bonnyfused -- http://www.florian-anwander.de