Shortwave Tuned Filter Amplifier 3-30MHz Adjustable Gain 0-30dB Narrow Band Filter BNC Interface RX TX PTT DC Power Supp

Specifications Frequency Range 3 30 MHzAdjustable Gain 0 30 dBFilter Bandwidth Approximately 1 MHzPower Supply DC 12V 13 8V 5 5 x 2 1 mm plug polarity Inner positive outer negative Relay Voltage and Current Tolerance Up to AC 440V DC 120V max 8AInterface Type BNC female ports ANT and RX TX Dimensions 10 4 cm x 6 3 cm x 3 6 cmFeatures 1 Shortwave tuned amplifier with transmit and pass through 2 Signals from the ANT interface are filtered by the built in shortwave tunable narrowband filter amplified by a low noise amplifier and then sent to the RX TX interface 3 The bandwidth of the tunable narrowband filter is approximately 1MHz Adjusting the filter knob to reach the target frequency allows the target frequency signal to pass through while other frequency signals are attenuated The filtered signal is then amplified by the low noise amplifier The amplifier gain is adjustable adjust it to a suitable gain based on the strength of the received signal and the dynamic range of the device to prevent receiver overload 4 Built in relay allows transmission even when the device is off or connected to a PTT signal line Maximum withstand voltage is AC 440V DC 120V and maximum withstand current is 8A Please use below the maximum withstand voltage and current 5 All rear interfaces are BNC female connectors Connect the RX TX connector to the radio or other transceiver equipment or receiver connect the ANT connector to the antenna 6 The PTT interface is a 3 5mm m