| 摘要 |
PURPOSE:To enable changing-over of loads to be readily performed at each exchanging of cartridges by mounting a specific card removably to the cartridge in an audio amplifier. CONSTITUTION:When the protruding piece 9 of a card 7 is so pushed in toward the end edge of an insulation substrate that it is interposed between a contact plate 3a or 3n and 4a or 4n, the respective contacts of the contact plate 3a or 3n and contact plate 4a or 4n facing a notch 10 maintain a closed state. On the other hand, the contacts which are force expanded by the protruding point 9 are opened. Hence, the connection state of load resistances R1, R2 and capacitor C to an equalizer amplifier 5 is changed and the load resistance and load capacity of the cartridge mnay be changed over. |
