SINCLAIR's TJ2215-3 148 – 174 MHz five-channel combiner, 7 in cavity-ferrite, dual-stage isolator. Sinclair’s "TJ2" series cavity-ferrite transmitter combiners are available in two or more channel configurations for use in systems from 132 – 174 MHz. Each channel on these combiners includes a low loss single- or dual-stage isolator and Sinclair-developed high "Q" bandpass cavity filter. The "TJ2" series utilizes very high "Q" quarter wavelength cavities, and is especially suitable for close channel separations, typically 150 kHz, *factory tuned to