Nissei RX-503 HF/VHF/UHF 1.8-525 MHz 200W Power Meter with crossed needles

The Nissei RX-503 is the essential tool for any radio operator wishing to guarantee the safety of his transceiver and the efficiency of his antenna system. This cross-needle model allows instant reading without complex calibration.

Highlights

• Simultaneous display: no need to toggle between power and VSWR, the crossed needles show everything at a glance.
• Exceptional versatility: Covers the CB band (27 MHz) as well as the HF, VHF (144 MHz) and UHF (430 MHz) amateur radio bands.
• Enhanced accuracy: Equipped with a 2/20/200W gauge selector for accurate reading even at low power (QRP).
• Integrated backlighting: For easy reading in dark environments or during night-time operations.
• Durable construction: Rigid metal chassis designed for long life in fixed position.

Technical specifications

• Frequency range: 1.8 to 525 MHz
• Power measurement range: 0 - 200W
• Power scales: 2W / 20W / 200W
• Accuracy: +/- 5% at 5W scale, +/- 7.5% at 20W scale, +/- 10% at 200W scale
• Minimum power for VSWR measurement: 1W
• Connectors: 2 x UHF-Female (SO-239)
• Impedance: 50 Ohms
• Insertion loss: less than 0.1 dB
• Lighting power supply: 13.8V DC
• Dimensions: 140 x 84 x 122 mm
• Weight: 950g

Compatibility

• Compatible with all HF, VHF and UHF transceivers (ICOM, Kenwood, Yaesu, AnyTone, CRT, President).
• For use with coaxial cables fitted with PL-259 connectors.
• Ideal for dipole, vertical, Yagi and mobile antennas operating between 1.8 and 525 MHz.

FAQ

Why choose the Nissei RX-503?

• Excellent value for money: Professional performance at an affordable price for hobbyists.
• Single bandwidth: A single unit replaces the need to buy two wattmeters (one HF and one VHF/UHF).
• Ease of use: Ideal for beginners and experts alike, thanks to simplified direct reading.
• Nissei reliability: A brand recognized worldwide for the robustness of its RF measurement instruments.