| 摘要 |
Disclosed is an AM radio receiver instructional device comprising a metal frame having a vertically opposing posts and being traversed by a mid-channel member. A flat transparent nonconductive panel mounted to the frame serves as visual display. A plurality of circuit boards integrally attached to the panel, each includes a plurality of port terminals adapted to interconnect with each other. A control member, connected to the circuit boards and mounted to the mid-channel member, regulates the flow of the de bias voltages to the circuit boards; said control member having a plurality of input and output terminals connected to the circuit boards as voltage test points. A power supply, connected to the circuit boards and mounted to the mid-channel member, is adapted to energize the device. |
