AC LINE CONNECTIONS FOR OVERSEAS USE
The power transformer supplied in DH-500 amplifiers sold in the USA is intended for 120 volt, 60 Hz operation only. For use in other countries, a multi-voltage transformer is supplied in Export versions, available at higher cost. It has dual tapped primary windings which can be connected in series or parallel combinations for 100, 120, 200, 220 or 240 volt, 50 or 60 Hz power sources. The connections which are different from the standard 120 volt connections described in the kit assembly instructions are all related to the transformer lead terminations, and to the large resistors on the 7-lug terminal strip. An additional 3-lug terminal strip is required when the
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multi-voltage transformer is installed. This, the 600 o hm resistors, the mounting hardware, and the alternate line fuse are supplied in kits which include this transformer.
The diagrams below show pictorially and schematically the alternative wiring. Only the pertinent wire connections are shown. There are other wires connected to the 7-lug terminal strip which are unchanged. If the amplifier is to be operated with line voltages between 200 and 240 volts, a different fan, part #AA128, is required, the 600 ohm resistors must replace the 300 ohm values, and the 7 ampere slo-blo fuse must replace the 15 ampere line fuse.
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240V.
