The Daiwa CN-501VN SWR Meter and Wattmeter 140-525 MHz N type Connectors-The Daiwa CN-501VN is a cross-needle SWR meter and wattmeter with a frequency range of 140 to 525 MHz and power scales of 20 and 200 W. It features N-type female connectors on the rear panel. is a commercial-grade, high-precision radio frequency diagnostic instrument engineered to monitor transmission line efficiency, structural impedance matches, and real-time output power curves. Driven by Daiwa’s signature cross-needle meter architecture, this premium testing terminal allows professional radio service technicians and network engineers to read forward power, reflected power, and continuous Voltage Standing Wave Ratio (VSWR) simultaneously at a single glance without requiring tedious calibration adjustments. It serves as an essential infrastructure asset for electronics repair benches, telecommunication field engineering kits, emergency dispatch service centers, and high-volume B2B radiocommunication hardware wholesale distribution channels looking to source premium metric instruments.
The advanced internal RF core of the CN-501VN provides accurate signal tracking across a dedicated VHF and UHF frequency spectrum, operating continuously over a frequency range of 140 to 525 MHz. Designed to accommodate both low-power portable walkie-talkies and high-power mobile or base station transceivers, the front-panel control plate integrates dual power scales of 20 W and 200 W, with a maximum continuous rated power of 200 W. The high-sensitivity sensor module features an SWR detection sensitivity of 4 W minimum, ensuring reliable reflection mapping even during low-power tuning sequences. Operating with a standard internal system line impedance of 50 Ohms, it safeguards signal path integrity while minimizing insertion loss across critical telemetry arrays.
Housed inside a ruggedized, vibration-dampened steel alloy shell built to survive punishing multi-season service workshop environments and mobile field-testing rigs, the console measures a highly balanced 155 x 80 x 100 mm and registers a stable net weight of 670 g to prevent bench slide during thick coaxial cable hookups. The rear interface bracket features heavy-duty, high-retention N-type female connectors with premium thread mapping to ensure a low-resistance, low-attenuation bridge for ultra-high-frequency applications. For dimly lit diagnostic environments, the device supports a 13.8 V power supply for instrument illumination, shipping complete with an included power cable to enable immediate visual panel synchronization and absolute deployment readiness on the workbench.
| Technical Specification Parameter | Specifications |
|---|---|
| Product Brand Designation | Daiwa Industry Co., Ltd. (Original Factory Premium Testing Line) |
| Hardware Model Designation | CN-501VN Series (Professional Cross-Needle Class) |
| Primary Component Classification | RF Forward/Reflected Wattmeter and Standing Wave Ratio (SWR) Meter |
| Operational Frequency Bandwidth | 140 MHz to 525 MHz Continuous RF Spectrum Capture (VHF / UHF Bands) |
| Selectable Meter Power Scales | Dual Range Configuration: 20 Watts and 200 Watts Multi-Scale Mapping |
| Maximum Rated RF Input Capacity | 200 Watts (200 W) Maximum Continuous Applied Power Limit |
| SWR Detection Sensitivity Threshold | 4 Watts (4 W) Minimum Required Carrier Power for VSWR Sampling |
| System Characteristic Impedance | 50 Ohms Nominal Transmission Line Calibration Path |
| Primary RF Interface Ports | 2x Rear-Mounted N-Type Female Coaxial Sockets |
| Instrument Panel Illumination | 13.8 V DC Nominal Power Input Loop for Meter Backlighting |
| Total Physical Console Dimensions | 155 mm (Width) x 80 mm (Depth) x 100 mm (Height) Housing Casing |
| Net Operational Component Mass | 670 grams Heavy-Duty Rigid Steel-Chassis Bench Base |
| Included Hardware Accessories | 1x Dedicated DC Backlight Interconnect Power Cable Loom |
| Verified Hardware Compatibility Scope | N-plug terminated low-loss coaxial cables, VHF/UHF mobile transceivers, commercial base stations, dummy loads, and 13.8V DC bench power distribution systems |
| Primary Fleet Utility Purpose | Turnkey radio repair bench outfitting, real-time antenna mismatch monitoring tracking, multi-point transmitter amplification mapping, and terminal final-transistor protection |
