1. Introduzione
This manual provides detailed instructions for the assembly, setup, operation, and maintenance of the N11R Mini ATU-100 Automatic Antenna Tuner. The ATU-100 is designed to automatically tune antennas across a wide frequency range, optimizing performance for radio amateur bands.
2. Prodotto finitoview
2.1 Caratteristiche principali
- Sintonizzazione automatica: Designed for automatic antenna impedance matching.
- Ampia gamma di frequenze: Operates effectively in broadband, overlapping radio amateur HF bands from 1.8MHz to 50MHz.
- Display OLED: Features an OLED screen for clear display of tuning data (Power, SWR, Capacitance, Inductance).
- Design compatto: Portable and easy to integrate into various setups.
- Kit fai da te: Provided as a kit for self-assembly, offering an educational and hands-on experience.
- Inductance & Capacitance Stages: Equipped with 7 inductance and 7 capacitance stages for precise tuning.
2.2 Package Contents (DIY Kit)
The N11R Mini ATU-100 is supplied as a DIY kit. Please verify all components are present before beginning assembly.
- 1 x Main Printed Circuit Board (PCB)
- 1 x OLED Display Module
- 1 x Set of Accessories (e.g., jumper wires, connectors, mounting hardware)
3. Specifiche
| Parametro | Valore |
|---|---|
| Materiale | PCB, Plastic |
| Gamma di frequenza | 1.8 MHz - 50 MHz |
| Consumo di corrente massimo | 400mAh |
| Power Measurement Step (under 10W) | 0.1 Watt |
| Power Measurement Step (above 10W) | 1 Watt |
| Precisione della misurazione della potenza | 10% |
| Set di induttanza massima | 8.53 uH |
| Passo minimo per impostare l'induttanza | 0.05 uH |
| Capacità massima installata | 1869pF |
| Minimal Installed Capacitance | 10pF |
| Colore | Nero |
| Main Board Dimensions (L x W x H) | Circa 128 x 62 x 20 mm (5.0 x 2.4 x 0.8 pollici) |
| OLED Display Dimensions (L x W) | Circa 28 x 27 mm (1.1 x 1.1 pollici) |
| Peso | Circa. 129 g (4.6 once) |
4. Installazione e assemblaggio
The N11R Mini ATU-100 is provided as a DIY kit and requires assembly. Basic soldering skills and familiarity with electronic components are recommended.
4.1 Fasi di assemblaggio
- Ispezionare i componenti: Unpack all components and verify against the package contents list. Check for any visible damage.
- Preparare il PCB: Familiarize yourself with the main Printed Circuit Board (PCB). Identify the input (IN) and output (OUT) antenna connectors, power input, and the header for the OLED display.
- Collega il display OLED:
- Locate the 4-pin header on the main PCB labeled "GND VCC SCL SDA".
- Locate the corresponding 4-pin header on the OLED display module.
- Using the provided jumper wires (or by soldering a pin header), connect the OLED module to the PCB, ensuring correct pin alignment:
- OLED GND to PCB GND
- OLED VCC to PCB VCC
- OLED SCL to PCB SCL
- OLED SDA to PCB SDA
Figure 4: OLED Display Module Pinout (GND, VCC, SCL, SDA) 
Figure 5: OLED Display Connected to Main PCB - Collegamento elettrico: Connect a suitable DC power supply (not included) to the power input terminals on the PCB. Ensure correct polarity.
- Collegamenti dell'antenna:
- Connect your transceiver's antenna output to the "IN" connector on the ATU-100.
- Connect your antenna to the "OUT" connector on the ATU-100.
Caution: Incorrect wiring or power supply voltage/polarity can damage the device. Always double-check connections before applying power.
5. Istruzioni per l'uso
The N11R Mini ATU-100 is an automatic antenna tuner designed for ease of use. Once assembled and connected, it will automatically attempt to match your antenna's impedance to your transceiver's output impedance.
5.1 Accensione iniziale
- Ensure all connections (power, transceiver, antenna) are secure.
- Apply power to the ATU-100. The OLED display should illuminate and show initial readings.
5.2 Automatic Tuning Process
When your transceiver transmits, the ATU-100 will detect the RF signal and automatically adjust its internal inductance and capacitance stages to achieve the lowest possible Standing Wave Ratio (SWR). The OLED display will show the current power (PWR), SWR, and the adjusted capacitance (C) and inductance (L) values.
- PWR: Displays the current power output from the transceiver.
- SWR: Shows the Standing Wave Ratio. A lower SWR (ideally close to 1.00) indicates a better match.
- C: Indicates the capacitance value selected by the tuner.
- L: Indicates the inductance value selected by the tuner.
For optimal performance, transmit a low-power signal (e.g., 5-10 watts) for a few seconds to allow the tuner to find the best match. Once tuned, you can increase your power output.
6. Manutenzione
- Pulizia: Mantenere il dispositivo pulito e privo di polvere. Utilizzare un panno morbido e asciutto per la pulizia. Non utilizzare detergenti liquidi.
- Magazzinaggio: Store the tuner in a dry, cool environment when not in use.
- Ispezione: Periodically inspect all connections and components for signs of wear or damage.
7. Risoluzione Dei Problemi
| Problema | Possibile causa | Soluzione |
|---|---|---|
| OLED display does not light up. | No power, incorrect power connection, faulty OLED module, incorrect OLED wiring. | Check power supply, verify power polarity, re-check OLED wiring (GND, VCC, SCL, SDA). |
| High SWR reading after tuning attempt. | Antenna mismatch too severe, faulty antenna/cable, tuner limits exceeded. | Check antenna and cable connections. Ensure antenna is suitable for the frequency. The tuner may not be able to match extremely high SWR. |
| Tuner does not respond to RF signal. | No RF input, incorrect IN/OUT connections, faulty transceiver output. | Verify transceiver is transmitting. Check IN/OUT antenna connections. Test transceiver with a dummy load. |
| Inconsistent readings on OLED. | Loose connections, RF interference, power supply instability. | Secure all connections. Ensure power supply is stable. Check for strong nearby RF sources. |
8. Suggerimenti per l'utente
- Ottimizzazione a bassa potenza: Always initiate tuning with low power (e.g., 5-10 watts) to protect your transceiver and the tuner.
- Qualità del cavo: Use high-quality coaxial cables for connections between the transceiver, tuner, and antenna to minimize signal loss.
- Messa a terra: Ensure proper grounding for your radio equipment, including the antenna tuner, to prevent RF interference and ensure safety.
- Allegato: As this is a bare PCB kit, consider housing it in a non-conductive enclosure to protect components from dust, moisture, and accidental short circuits.
9. Garanzia e supporto
Per informazioni sulla garanzia e assistenza tecnica, consultare le policy del venditore o contattare il punto vendita. Conservare la documentazione di acquisto per eventuali reclami in garanzia.