For amateur radio 5W 328MHz ZQRP Zmatched antenna tuner with manual control supporting high and low impedance settings

Features:  Set the high impedance/low impedance switch to the high impedance (HL) position. The high impedance setting provides optimal coupling and operating efficiency. Briefly press the transmitter button and try adjusting the knob to dim the LED indicator. Repeat the adjustment until the LED indicator goes out or reaches its minimum brightness. If the LED indicator brightness is still not for idealafter adjustment, switch the switch to the low impedance position and repeat the above adjustment process. Note: In some matching adjustments, the LED indicator may not go out completely. Even if the LED indicator does not go out completely, your antenna is already tuned to normal operating conditions. Switch the tuning/operation switch to the operation position. Start communicating with long-distance radios!

Specifications: Part Name: Z-QRP Manual Antenna Tuner Material: Aluminum Alloy Color: Blue Power: Rated Power 5W, Intermittent Power 10W size: 80mm*75mm*35mm (excluding protrusions) Connector: BNC Matching Impedance Range: 25 ~ 2500 ohms Frequency: 3-28MHz

Package Contents: 1 x Z-QRP Manual Antenna Tuner

Note:  The color may vary slightly between different batches, but the function remains the same. The green background image is the closest to the actual product color. Please do not purchase if this is a concern.