The 144-148/420-450MHz L220 Compact VHF/UHF Dual Band Walkie Talkie Antenna is a high-performance antenna designed for superior signal reception and transmission across both VHF and UHF bands. Its durable copper construction ensures strong connectivity and stable performance, making it ideal for dual-band handheld radios and walkie talkies used in amateur and professional communication setups.

Features:

1. Supports wideband transmit and receive frequencies for VHF and UHF applications
2. High gain of 2.15dBi (VHF) and 3.0dBi (UHF) for enhanced communication range
3. Omni-directional radiation pattern for consistent signal in all directions
4. Precision-engineered SMA-J connector for secure attachment
5. Compact, durable, and built to perform in rugged environments

Specifications:

• Model: NA701
• Transmit Frequency (TX): 144148MHz (VHF) / 420450MHz (UHF)
• Receive Frequency (RX): 120174MHz (VHF) / 300520MHz (UHF)
• Impedance: 50
• VSWR: 1.5
• Gain: 2.15dBi (VHF) / 3.0dBi (UHF)
• Polarization: Omni
• Connector Type: SMA-J
• Material & Color: Copper
• Mounting Type: SMA-J
• Size: L=220mm
• Weight: 30g
• Operating Temperature: -40C to +85C

Package Includes:

1 144-148/420-450MHz L220 Compact VHF/UHF Dual Band Walkie Talkie Antenna

WCS2720 Hall Effect based Linear Current Sensor (0-20A)

The Winson WCS2720Hall EffectCurrent Sensor provides an economical and precise solution for both DC and AC current sensing in industrial, commercial, and communications systems. The unique package allows for easy implementation by the customer. Typical applications include motor control, load detection and management, over-current fault detection and any intelligent power management system, etc.

The WCS2720 sensor consists of a precise, low-temperature drift linear hall sensor IC with a temperature compensation circuit and a current path with 0.5 m? typical internal conductor resistance. This extremely low resistance can effectively reduce power loss, and operating temperature and increase reliability greatly. Applied current flowing through this conduction path generates a magnetic field which is sensed by the integrated Hall IC and converted into a proportional voltage. The terminals of the conductive path are electrically isolated from the sensor leads. This allows the WCS2720 current sensor to be used in applications requiring electrical isolation without the use of optoisolators or other costly isolation techniques and makes the system more competitive in cost.

Pinout:

Pinout ofWCS2720 Hall Effect based Linear Current Sensor