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GH-S180 SWR-Wattmeter...
The Guohe SWR-120 is a high precision digital...
GH-S180 SWR-Wattmeter TOS-meter HF 1.8-54MHz 120W HD Color Screen
No review at the momentThe Guohe SWR-120 is a high precision digital wattmeter and TOS-meter designed for amateur radio operators and HF/50MHz radio users. This compact device allows for direct and instant reading of forward power, reflected power and standing wave ratio (SWR).
- Extended frequency range from 1.8 to 54 MHz
- Power measurement up to 120W (200W peak in SSB)
- HD 240x240 pixel color screen for perfect readability
- Customizable high TOS alarm and built-in lithium battery
- Bilingual menu interface (English/Chinese) and recharge via USB-C
Comes with: 1 SWR-120 wattmeter, 1 USB Type-C charging cable.
Data sheet
The Guohe SWR-120 positions itself as an essential tool for any radio operator wishing to monitor the health of their antenna system in real time. Its compactness combined with a modern graphic display makes it an ideal choice for both fixed use and field activations (POTA/SOTA).
Key Features
- High resolution display: 240x240 pixel HD color screen offering exceptional data clarity.
- Safety alarms: Built-in buzzer alerting in case of too high TOS (adjustable) to protect your transmitter.
- Intelligent automation: Automatic ignition as soon as a transmission is detected and programmable delayed shutdown.
- Measurement versatility: Supports FM, AM and SSB modes with peak power management.
- Modern interface: Universal USB-C charging connector and high capacity 1000mAh battery for extended autonomy.
- Customization: Menus allowing fine adjustment of power and TOS measurement.
Technical Specifications
- Frequency range: 1.8 MHz to 54 MHz
- Power measurement range: 0.5W to 120W (Up to 200W max in SSB mode)
- TOS (SWR) measurement range: 1.0 to 99.9
- Accuracy: Fine calibration available via the menu
- Display: 240 x 240 Color TFT Screen
- RF Connectors: UHF-Female (SO-239 / SL16)
- Power supply: Internal battery 3.7V / 1000mAh
- Charge: USB Type-C 5V / 1A
- TOS alarm threshold: Default set to 2.0 (configurable)
- Battery protection: Alert at 3.4V, automatic shutdown at 3.35V
- Dimensions: 88 x 63 x 38 mm
Compatibility
- HF/50MHz transceivers (Icom, Yaesu, Kenwood, Xiegu, AnyTone).
- Power amplifiers up to 120W continuous.
- Wire, vertical and directional antennas powered by 50 Ohm coaxial cable.
- Standard PL-259 (UHF-Male) connector.
FAQ
Can it be used with a 27 MHz CB radio?
Yes, the SWR-120 covers the 27 MHz band and supports AM/FM/SSB modes, making it perfect for CB installations.
How to calibrate the device if the measurements seem offset?
The device has a fine-tuning function in the hidden menu to adjust power and TOS readings.
Can the TOS alarm be disabled?
Yes, the buzzer can be activated or deactivated with a simple button press via the user interface.
Does the device work while charging?
Yes, it can be used while it is plugged into a 5V USB-C power source.
What is the maximum power supported in SSB?
In SSB mode, the device can support peaks up to 200W, beyond which the overload alarm will trigger.
Why choose the Guohe SWR-120?
- Intuitive reading: Unlike traditional needles, the digital display allows for error-free parallax reading.
- Extreme compactness: Easily slips into a transport bag for radio expeditions.
- Built-in protection: The audible alarm instantly warns of any risk to your radio's power transistors (PA).
- Excellent value for money: Offers advanced monitoring features for a very competitive cost.
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