A.H. Systems' Preamplifier line is an excellent choice with a rugged design, no hassles with soldering your own power leads and they improve overall system sensitivity by at least 20 dB. All of A.H. Systems' Preamplifiers come with a 12-volt (or 15-volt) DC regulated power source. A low voltage indicator confidently allows you to power the amplifier with your own external 12-volt DC battery. This makes it a convenient choice for field measurements.
With 28 dB of gain, this preamplifier is great at improving system sensitivity for frequencies from 5 KHz to 300 MHz
With 50 dB of gain, this preamplifier is great at improving system sensitivity for frequencies from 10 MHz to 1000 MHz