| 摘要 |
PURPOSE:To locate a switching circuit near a head amplifier, by using two relays for switching so as to short-circuit a channel not in use. CONSTITUTION:The 1st switching relay 7 connecting each one terminal of each coil to, e.g. one output terminal 5, and the 2nd switching relay 8 connecting one terminal of each coil to the other output terminal 6 selectively, are provided. Then, the relays are used to short-circuit and to ground a channel not in use for the purpose of connection so as not to have the effect of the channel not in use. Thus, the arrangement is attained for a rotary transformer 3 and the relays 7, 8 so as to use shield wires among them. That is, the switching circuit is located near the head amplifier 9. |
