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The Apollo-IV is an 18-channel SSB/AM base station transceiver designed for two-way radio communication. It offers a blend of practical functionality and exciting features, making it suitable for both experienced users and those new to radio communication. The device is built with high-quality components to ensure reliability and optimal performance.
The Apollo-IV functions as a Citizens Band (CB) radio, allowing users to transmit and receive on 18 designated channels. It supports three modes of operation: standard AM (Amplitude Modulation), LSB (Lower Sideband), and USB (Upper Sideband). Communication between stations is only possible if both are operating in the same mode. The transceiver is primarily designed for AC-powered base station use but also offers DC power operation, making it versatile for various scenarios such as power outages, camping, or mobile use.
A key feature of the Apollo-IV is its ability to operate as a public address (PA) system. When an external 8-ohm, 3-watt speaker is connected to the PA SP jack on the rear panel, the transceiver can be used to project sound. This function is disabled when the unit is in CB mode.
The device includes a Push-to-Talk (PTT) microphone, which controls the receiver and transmitter sections. Pressing the PTT switch activates the transmitter, while releasing it allows the user to receive. For optimal transmission, the microphone should be held 5 to 6 centimeters from the lips, and the user should speak in a normal conversational voice. The radio requires the supplied low-impedance dynamic microphone to be operational, preventing unauthorized use.
The Apollo-IV offers a range of controls and indicators on its front panel to facilitate ease of use.
For receiving, users should connect the microphone, place the CB-PA switch in the CB position, rotate the Squelch Control fully counterclockwise, and the RF Gain Control fully clockwise. Temporarily set the LSB-USB-AM switch to AM, turn the unit on, and set the Volume Control for a comfortable listening level. Then, select an unoccupied channel and slowly adjust the Squelch Control clockwise until the hissing noise disappears. For advanced SSB reception, the LSB-USB-AM switch and Clarifier should be adjusted for clearer voice.
For transmitting, after ensuring the chosen channel is clear, users should select the desired mode (LSB, USB, or AM). Once the channel is confirmed unoccupied, depress the Push-to-Talk switch on the microphone and speak in a normal conversational voice. It is important not to transmit an unmodulated wave (carrier) to comply with regulations. Releasing the Push-to-Talk switch stops transmission and enables reception.
The Apollo-IV transceiver is specifically designed for durability, particularly for mobile installations. Its fully transistorized circuitry, incorporating reliable ICs and semiconductors, ensures high stability and reliability in base operation.
In the event of a failure, it is crucial to replace parts only with identical components authorized by Apollo. Substitution of parts is not recommended. Users are advised to refer to the schematic diagram for guidance.
The transceiver is factory-aligned and should not require any adjustment when used with a 52-ohm antenna. However, if an antenna with a different impedance is used, adjustment of the transmitter output circuit may be necessary to achieve optimum power transfer to the antenna. This adjustment should only be performed by qualified personnel using high-quality measurement equipment.
If the performance described in the Receive and Transmit Operation sections cannot be achieved, users should first review the instructions to ensure that proper procedures were followed. If problems persist, contacting an Apollo dealer or the place of purchase for specific servicing information is recommended. They are equipped to provide assistance and meet user needs.
To prevent fire or shock hazards, the appliance should not be exposed to rain or moisture. It is also advisable to save all packing materials (carton, fillers, cushionings) as they will be valuable in preventing damage if the unit ever needs to be transported or shipped.
General| Frequency Range | 400-470MHz |
|---|---|
| Number of Channels | 16 |
| RF Output Power | 5W |
| Battery Type | Li-ion |
| Battery Capacity | 1800mAh |
| Waterproof Rating | IP54 |
| Operating Voltage | 7.4V |
| Weight | 220 g |
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