Magnum S-9 10 Meter HF Amateur Mobile Transceiver Schematic
This document provides a detailed schematic diagram for the Magnum S-9 10 Meter HF Amateur Mobile Transceiver. It outlines the electronic components and their interconnections across various circuit boards.
Main Circuit Boards and Components
The schematic illustrates the complex circuitry of the transceiver, detailing components such as transistors (e.g., 2SC1675L, 2SC945P, 2SA733P), integrated circuits (e.g., LM358M, TA324, NJM4558D, KS8805B, KIA7217A), resistors, capacitors, inductors, diodes, and various switches and connectors.
Key circuit boards identified include:
- Main Board (PCBX-9821R17): This board appears to be central to the transceiver's operation, featuring numerous transistors, ICs, and passive components.
- Display Board (PCBX-0333R2): Houses the frequency display and associated circuitry.
- LED Driver Board (PCBX-0334R3): Manages the lighting for indicators.
- SWR Switch (PCBX-0309R3): Integrates the SWR detection and switching functions.
- SWR Detector (PCBX 9306): Component for SWR measurement.
- Talk Back / Echo Board (PCBX-0319R1): Handles audio feedback and echo functions.
- PCBX-9709: Likely related to audio or microphone input.
The schematic also details power supply connections (e.g., 8V, 13.8V, B+), ground points, and various input/output connectors for microphones, antennas (coaxial wire), and other peripherals.
Key Functional Blocks
The diagram highlights several functional blocks:
- RF Metering: Components related to SWR (Standing Wave Ratio) detection and display.
- Audio Processing: Circuits for microphone input, amplification (MIC GAIN), and speaker output.
- VCO (Voltage-Controlled Oscillator) and Frequency Synthesis: Components enabling frequency selection and tuning.
- Power Supply Regulation: Circuits managing the various voltage rails required by the transceiver.
- Control Switches: Various band switches (BAND SW), dimmer switches (DIMMER SW), and alert switches (SWR ALERT ON/OFF).
Component Identification and Notes
Components are identified by alphanumeric codes (e.g., R1, C1, TR1, IC1, D1, L1, VR1, S1, J1). Specific component types and values are indicated where possible (e.g., 2SC1675L, 10KΩ resistor, 10µF capacitor, IN4148 diode, 10.24MHz crystal).
Note: All changes are subject for better performance without further notice.
