MiniKits.com.au 2m 144MHz VHF RX/TX Preamplifier This product is ideal for use with the Icom Multimode VHF transceivers including the IC-275, IC-820/821, IC-910H and IC9100 that have a PREAMP enable switch to supply +12vdc out of the antenna connector in RX mode. Transceivers without this function will require an external bias tee like the Mini-Kits EME168-2-70 to supply DC power up the coaxial cable. When using a high power RF amplifier up to 500 Watts, additional sequencing will be required to protect the pre-amplifier from damage. The Mini-Kits EME166 Sequencer can be adapted to be used for correct sequence timing of the RX to TX changeover. This unit is peaked for 145.800 MHz and mounted in a Nickel sprayed GME enclosure. It was used once for an ISS contact. $100.00 USD OBO. Buyer pays S&H. Specifications Frequency Range:Band Pass: 140 to 150MHz (BW 10MHz @ 1dB)Band Rejection: Typically 40dB @ 50MHz, 60dB @ 430MHz Gain Adjustable: Typically +18dB Max, 10dB Min @ 145MHz Noise Figure: 0.8dB ( Typically <0.7dB @ 145MHz)Through Loss: 0.05dB @ 145MHz (Bypass Mode)RF Power Handling: 100W CW (Un-Sequenced ) 500W PEP (Sequenced)Minimum RF Input: +20dBm (100mW) To activate the RF sensing circuitOperating Voltage: +11 to 15vdc (+12vdc @ 150mA Recommended)Board Size: 80mm L x 84mm W x 25mm H (with BNC connectors)
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