OPEK SWR-2 - SWR Meter with 300mm Patch Lead

OPEK SWR-2 - SWR Meter with 300mm Patch Lead

Product Overview

The OPEK SWR-2 is a professional-grade Standing Wave Ratio (SWR) meter designed for HF amateur radio and shortwave communication applications operating between 1.7-30 MHz. This precision instrument features dual 200 DC-Micro ammeter indicators for simultaneous forward and reflected power monitoring, enabling accurate antenna system tuning and impedance matching for optimal transmission efficiency. The compact 88mm x 62mm x 80mm design includes a 300mm patch lead for convenient installation between transceiver and antenna feedline.

The OPEK SWR-2 provides essential diagnostic capabilities for HF amateur radio operators, CB radio enthusiasts, and shortwave communication professionals requiring accurate SWR measurements to protect transmitter equipment and maximize radiated power. The 52Ω impedance configuration matches standard coaxial cable systems, while the 10-watt power measurement capability accommodates low-power QRP operations and portable field stations across the entire HF spectrum from 160 meters to 10 meters.

Features & Benefits

1.7-30 MHz HF Coverage Complete frequency coverage across all HF amateur radio bands from 160 meters through 10 meters, including 80m, 40m, 20m, 15m, and 10m bands, enabling comprehensive antenna system analysis for shortwave communication, amateur radio operations, and CB installations.

Dual 200 DC-Micro Ammeter Display Precision analog meter movements provide simultaneous monitoring of forward power and reflected power, allowing real-time SWR calculation and antenna tuning without switching between measurement modes, improving operational efficiency during field deployments.

52Ω Standard Impedance Engineered for 52-ohm impedance systems including RG-58, RG-8X, and RG-213 coaxial cables, ensuring accurate measurements with standard amateur radio antenna configurations and transmission line installations without impedance transformation requirements.

10-Watt Power Measurement Optimized for QRP (low-power) amateur radio operations up to 10 watts output, protecting sensitive meter movements from overload while providing accurate SWR readings for portable field stations, emergency communications, and low-power HF transceivers.

Compact 88mm x 62mm x 80mm Design Space-efficient dimensions fit portable radio stations, mobile HF installations, and desktop operating positions without consuming valuable workspace, while the 300mm patch lead facilitates flexible positioning between transceiver and antenna tuner or feedline connection.

±5% Measurement Accuracy Industrial-grade precision provides reliable SWR readings within ±5% tolerance, delivering sufficient accuracy for antenna system optimization, resonance identification, and transmitter protection across amateur radio and shortwave communication applications.

Technical Specifications

Installation & Compatibility

The OPEK SWR-2 installs in-line between the HF transceiver and antenna feedline using standard SO-239 (UHF female) connectors. The meter requires no external power source, operating entirely from the RF power passing through the measurement circuit. The included 300mm patch lead connects between the transceiver output and the SWR meter input, with the antenna feedline connecting to the meter's output connector.

For accurate SWR measurements, ensure all coaxial connections are properly tightened and free from corrosion. The meter is compatible with 52-ohm antenna systems including HF dipoles, vertical antennas, end-fed wires, and mobile whip antennas operating within the 1.7-30 MHz frequency range. The 10-watt maximum power rating makes this meter ideal for QRP transceivers, portable field stations, and low-power amateur radio operations.

When using the OPEK SWR-2, transmit briefly into a dummy load or antenna to observe meter deflection. Adjust antenna length or tuner settings to achieve minimum reflected power (SWR 1.5:1 or lower ideal). For power levels exceeding 10 watts, consider upgrading to a higher-power SWR meter to prevent meter damage. Professional installation and proper grounding practices are recommended for permanent station installations.

Frequently Asked Questions

Q: What frequency bands does the OPEK SWR-2 cover?

A: The OPEK SWR-2 covers 1.7-30 MHz, which includes all HF amateur radio bands from 160 meters (1.8 MHz) through 10 meters (28-29.7 MHz). This includes the popular 80m, 40m, 20m, 15m, and 10m amateur bands, plus the 27 MHz CB radio band and shortwave listening frequencies.

Q: Can I use the OPEK SWR-2 with 100-watt transceivers?

A: No, the OPEK SWR-2 is rated for a maximum of 10 watts power measurement. Exceeding this power level will damage the sensitive meter movements. This meter is specifically designed for QRP (low-power) operations. For 100-watt transceivers, you need an SWR meter rated for at least 100-200 watts continuous power.

Q: Does the SWR meter require batteries or external power?

A: No, the OPEK SWR-2 is a passive device that operates entirely from the RF power passing through it during transmission. No batteries or external power source is required. Simply connect it in-line between your transceiver and antenna, and it will measure SWR when you transmit.

Q: What type of connectors does the OPEK SWR-2 use?

A: The OPEK SWR-2 uses standard SO-239 (UHF female) connectors on both input and output ports. These mate with PL-259 (UHF male) connectors commonly found on coaxial cables like RG-58, RG-8X, and RG-213. The included 300mm patch lead has the appropriate connectors for installation.

Q: How do I read the SWR on the dual meter display?

A: The OPEK SWR-2 features two analog meters showing forward power and reflected power. To calculate SWR, transmit at low power and note both meter readings. A high forward power reading with low reflected power indicates good SWR (1.5:1 or better). If both meters show similar readings, your SWR is poor (3:1 or higher) and antenna adjustment is required.