Description
The NISSEI SWR Power Meter TX-502 1.6–525 MHz 200W Cross Needle is a professional RF measurement instrument designed for accurate monitoring of Standing Wave Ratio (SWR), Direct Power, Reflected Power, and Peak Envelope Power (PEP) across a wide frequency range. Engineered for communication professionals, radio operators, and RF testing environments, this meter helps optimize antenna performance and maintain efficient transmission.
Supporting a broad frequency range of 1.6–525 MHz, the TX-502 covers HF, VHF, and UHF communication bands, making it suitable for antenna tuning, communication system setup, repeater testing, and RF performance analysis.
Built with a cross-needle analogue display, the TX-502 allows users to simultaneously monitor Direct Power, Reflected Power, and SWR without requiring calibration, enabling faster setup and efficient operation. The integrated PEP (Peak Envelope Power) active measurement supports enhanced monitoring for communication applications requiring peak power observation.
The meter offers three selectable power ranges (2W / 20W / 200W), allowing accurate RF measurement across low and high transmission levels. With measurement precision better than ±10% and a minimum measurable power of 1W, users can perform dependable RF analysis and optimize transmission quality.
Designed for stable operation, the TX-502 operates on 9–14 VDC with a maximum current consumption of 200 mA. Built with 50 Ω impedance, it ensures compatibility with standard RF and antenna systems.
For installation flexibility, the unit features SO-239 connectors with dual INPUT and OUTPUT ports, supporting convenient integration into communication setups. Its robust construction with dimensions of 184 × 118 × 131 mm and a weight of 1070 g makes it suitable for both fixed and professional RF environments.
Specifications
- Model: NISSEI TX-502
- Frequency Range: 1.6–525 MHz
- Power Range: 2W / 20W / 200W
- Precision: Better than ±10%
- Minimum Power: 1W
- Measurement Functions: Direct Power / Reflected Power / SWR / PEP (Active)
- Impedance: 50 Ω
- Power Requirement: 9–14 VDC, 200 mA Max
- Connector Type: SO-239 (2 INPUT / 2 OUTPUT)
- Dimensions: 184 × 118 × 131 mm
- Weight: 1070 g
Key Features
- Wideband 1.6–525 MHz HF/VHF/UHF coverage
- Cross-needle display for simultaneous measurement
- Measures Direct Power, Reflected Power, SWR & PEP
- Three selectable power scales: 2W / 20W / 200W
- Precision measurement better than ±10%
- Minimum measurable power of 1W
- Dual SO-239 input/output connectivity
- Ideal for antenna tuning and RF optimization
Applications
- Antenna tuning and SWR monitoring
- HF, VHF, and UHF communication systems
- Amateur (Ham) radio operation
- RF communication testing
- Base station maintenance
- Signal transmission analysis
- Communication equipment setup and optimization








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