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If you're looking for a Hydrogen Line LNA with a built-in Bias Tee
118-140 MHz
It also has a Low Frequency Stabilization Circuit
Filtering in GNSS
Power it one of three ways: a Micro-USB cable
144-148 MHz Bandpass Filter for 2m Band Notch Filter If you're looking for aPRODUCT OVERVIEW The GPIO Labs 144148 MHz Bandpass Filter protects 2m band receivers from out of band interference strong FM broadcast, cellular, and adjacent service signals that desensitize front end amplifiers and mask weak signals. Passband covers 144148 MHz (North South America, Hawaii, Asia, Oceania) and 144146 MHz (Europe, Africa, Russia), matching regional 2m allocations for amateur radio, satellite communications, APRS, and VHF land mobile
