Where to buy high-voltage power supplies for OKO driver boards?

Any regulated (DC 0...300V, 100mA) laboratory power supply will work. Good regulated 300V power supplies are produced by Delta Elektronika, postbus 27, 4300 AA Zierikzee, The Netherlands, tel. (0)111-413656, fax (0)11-416919. EMCO high-voltage DC to DC convertors F03 (F02 for lower voltage) can be used for portable applications. One module is needed for a 19-ch system, two modules will power a 37-ch system. In general, you will need one module per 20 channels.