To Next PageTo Next PageWhat to do if PTT key is pressed but Alinco Transceiver transmission does not occur?
If the PTT key is pressed but transmission doesn't occur, check the microphone and antenna connections. Ensure the microphone is properly connected. Also, verify that the antenna is correctly connected.
Why no sound comes from Alinco DR-638 speaker?
If no sound is coming from the speaker, try decreasing the squelch level. Also, ensure that the CTCSS or DCS squelch is turned off.
What to do if Alinco DR-638 Transceiver fuse is blown?
If the fuse is blown, you should identify and resolve the underlying issue that caused the fuse to blow. After fixing the problem, replace the blown fuse with a new one.
How to unlock Alinco DR-638 Transceiver if key and dial do not function?
If the key and dial do not function, cancel the Key-lock function.
Why Alinco DR-638 rotating dial will not change memory channel?
If the rotating dial will not change the memory channel, it may be because the Transceiver is in CALL mode. Try changing to the VFO or memory mode.
How to fix dim display on Alinco DR-638?
If the display is too dim, adjust the LCD backlight parameter to the proper setting.
What to do if power is on, nothing appears on Alinco DR-638 Transceiver display?
If the power is on but nothing appears on the display, the polarities of the power connection may be reversed. Connect the red lead to the positive terminal and the black lead to the negative terminal of the DC power supply.
General| Brand | Alinco |
|---|---|
| Model | DR-638 |
| Category | Transceiver |
| Language | English |
Important safety alerts, handling precautions, and environmental advice.
Key safety alerts and warnings for operating the radio product.
Safe practices for using the transceiver, power, and emergency situations.
Guidelines for safe operating conditions and environmental factors.
Instructions for mounting the transceiver securely in a vehicle.
Steps for connecting the transceiver to a vehicle's DC power source.
Proper method for connecting an efficient antenna for optimal performance.
Details on connecting the microphone and its placement.
Identification and function of controls on the transceiver's front panel.
Explanation of symbols and information shown on the LCD display.
Description of ports and connectors on the back of the unit.
Details on the microphone layout and its connector pinout.
How to power the unit and adjust audio levels for both bands.
Setting the squelch to minimize noise and receive signals effectively.
Navigating between frequency and memory channel modes.
Methods for selecting operating frequencies and memory channels.
Switching between and transmitting on main and sub bands.
How the transceiver receives signals on both bands and interprets indicators.
Temporarily disabling squelch for monitoring weak signals.
Steps for initiating transmission and speaking into the microphone.
Adjusting the transmitter output power level (High, Mid, Low).
How to reverse transmit and receive frequencies for repeater use.
Setting up CTCSS/DCS tones for selective calling.
Accessing a pre-programmed frequently used channel.
Scanning for active CTCSS/DCS codes.
Initiating and controlling channel or frequency scans.
Storing frequencies and settings into memory channels.
Copying and removing memory channel data.
Organizing and accessing memory channels in different banks.
Setting automatic power-off timer for energy saving.
Configuring the transceiver for automatic transmit frequency offset.
Adjusting the frequency increment step in VFO mode.
