The Blonder Tongue CMA-b and SCMA-Ub Single Channel Preamplifier Series are professional quality, very low noise, single channel VHF/F< and UHF preamplifiers. The CMA-b is optimized for a single VHF channel or FM Band (88-108 MHz), while the SCMA-Ub is optimized for a single UHF channel. These preamplifiers can accept a wide range of input signal levels and offer excellent gain, making these units ideal for difficult signal areas.