1. Introduktion og overview
The Dynascan P-72 is an advanced dual-band mobile amateur radio transceiver designed for reliable communication across VHF and UHF frequencies. Its compact size and robust feature set make it ideal for various amateur radio applications. This manual provides comprehensive instructions for the proper setup, operation, and maintenance of your Dynascan P-72.
Nøglefunktioner:
- Full Duplex Capability
- Simultaneous Reception of VHF and UHF Frequencies (144-146 MHz / 430-440 MHz)
- 20W Transmission Power
- 255 hukommelseskanaler
- Side Jack for Microphone-Headset or Speaker-Microphone
- Selectable Frequency Steps: 5, 6.25, 10, 12.5, 25, 50, and 100 kHz
- Tastaturlås funktion
- Integrated DTMF Keypad
- TOT (Time-Out Timer) Function
- VOX funktion
- Built-in Scanner
- Supports 53 CTCSS Tones and 108 DCS Tones
- Backlit LCD Display with Function Indicator
- Commercial FM Radio Function
- Ultrakompakt størrelse
2. Pakkens indhold
Please check the box carefully to ensure all items are present and in good condition:
- Dynascan P-72 Transceiver Unit
- Handheld Speaker Microphone with Keypad
- DC strømkabel
- Monteringsbeslag og hardware

Figur 2.1: Dynascan P-72 package contents, including the main transceiver unit, handheld speaker microphone, mounting bracket, and power cable.
3. Opsætning
Follow these steps to set up your Dynascan P-72 for initial operation.
3.1 Tilslutning af mikrofonen
Connect the coiled cable of the handheld speaker microphone to the dedicated jack on the side of the transceiver unit. Ensure the connector is fully inserted to establish a secure connection.
3.2 Strømtilslutning
Connect the supplied DC power cable to the power input on the rear of the transceiver. Connect the other end of the power cable to a stable 13.8 VDC power source capable of supplying sufficient current (e.g., a regulated power supply or vehicle battery). Observe correct polarity (red for positive, black for negative).
3.3 Antenneforbindelse
Connect a suitable 50 Ohm dual-band antenna (VHF/UHF) to the antenna connector on the rear of the transceiver. Ensure the connection is tight and secure. Never transmit without an antenna connected, as this can damage the transceiver.

Figur 3.1: The Dynascan P-72 transceiver with its handheld speaker microphone connected, showing the main display.
4. Betjeningsvejledning
This section details the basic operation of your Dynascan P-72.
4.1 Tænd/sluk
For at tænde enheden skal du trykke på og holde MAGT button (usually located on the front panel or microphone). To power off, press and hold the same button again.
4.2 Justering af lydstyrke og squelch
- Bind: Drej på BIND knob (or use volume controls on the microphone) to adjust the audio output level.
- Squelch: Drej på SQL knob to set the squelch level. Adjust it until background noise disappears, but weak signals can still be heard.
4.3 Frekvensvalg (VFO-tilstand)
In VFO (Variable Frequency Oscillator) mode, you can directly input or tune to desired frequencies.
- Tryk på VFO/MR button to switch to VFO mode.
- Use the main tuning knob on the transceiver or the up/down arrows on the microphone to adjust the frequency.
- Alternatively, use the DTMF keypad on the microphone to directly enter the desired frequency.
4.4 Channel Operation (Memory Mode)
The P-72 supports 255 memory channels for storing frequently used frequencies and settings.
- Tryk på VFO/MR button to switch to Memory mode.
- Use the tuning knob or up/down arrows to scroll through stored memory channels.
- Refer to the full manual for detailed instructions on storing and deleting memory channels.
4.5 Transmission (PTT)
For at sende, tryk og hold nede PTT (Push-to-Talk) button on the side of the handheld microphone. Speak clearly into the microphone. Release the PTT button to return to receive mode.
4.6 Dual Frequency Reception and Full Duplex
The Dynascan P-72 can receive two frequencies simultaneously (VHF and UHF). It also supports full duplex operation, allowing you to transmit on one band while receiving on another.
- The display will show both active frequencies.
- Brug A/B button to select which frequency is active for transmission.

Figur 4.1: Vinklet view of the Dynascan P-72, highlighting the display and control knobs.
5. Vedligeholdelse
Proper maintenance ensures the longevity and optimal performance of your Dynascan P-72.
5.1 Rengøring
Wipe the transceiver and microphone with a soft, dry cloth. For stubborn dirt, use a slightly damp klud med mild sæbe, og tør derefter af. Brug ikke skrappe kemikalier, opløsningsmidler eller slibende rengøringsmidler.
5.2 Opbevaring
When not in use for extended periods, store the unit in a cool, dry place away from direct sunlight, extreme temperatures, and excessive dust. Disconnect the power cable and antenna.
5.3 Antenna and Cable Care
Regularly inspect antenna connections and cables for any signs of wear, damage, or corrosion. Ensure all connections remain tight to prevent signal loss and potential damage to the transceiver.
6. Fejlfinding
If you encounter issues with your Dynascan P-72, refer to the following common problems and solutions.
| Problem | Mulig årsag | Løsning |
|---|---|---|
| Ingen strøm | Strømkabel frakoblet; forkert lydstyrketage; sprunget sikring. | Check power cable connection; verify power supply voltage (13.8 VDC); check inline fuse on power cable. |
| Ingen lyd / Svag lyd | Volume too low; squelch set too high; microphone not connected properly. | Increase volume; lower squelch level; ensure microphone is fully inserted. |
| Kan ikke sende | Antenna not connected; PTT button faulty; frequency out of band. | Connect antenna securely; test PTT button; ensure frequency is within 144-146 MHz or 430-440 MHz. |
| Dårlig modtagelse | Antenna issue; high interference; squelch too high. | Check antenna connection and condition; move away from interference sources; lower squelch. |
| Tastatur låst | Tastaturlåsefunktion aktiveret. | Refer to the manual for the specific key combination to unlock the keypad. |
For issues not listed here, or if troubleshooting steps do not resolve the problem, please contact your dealer or a qualified service technician.
7. Specifikationer
Detailed technical specifications for the Dynascan P-72.
| Feature | Specifikation |
|---|---|
| Modelnummer | DYNASCAN P-72 |
| Frekvensområde | VHF: 144-146 MHz, UHF: 430-440 MHz |
| Transmissionseffekt | 20 W |
| Antal kanaler | 255 |
| Frekvenstrin | 5, 6.25, 10, 12.5, 25, 50, 100 kHz |
| Tuner-teknologi | UHF, VHF |
| Voltage | 13.8 VDC |
| Antenne impedans | 50 Ohm |
| Lydudgang | 2 W |
| Dimensioner (ca.) | 121.5 x 66.5 x 42.5 mm |
| Vægt (ca.) | 550 g (with microphone) |
| Farve | Sort |
| Særlige funktioner | Keypad Lock, Compact Design |
8. Garanti og support
The Dynascan P-72 is manufactured by Pihernz Comunicaciones. For warranty information and technical support, please refer to the documentation provided with your purchase or contact your authorized dealer. Keep your proof of purchase for any warranty claims.





