The CB503 tuneable High-Q, high power VHF/UHF bandpass filter is comprised of a three section passive machined combline filter with an input/output coupling structure. This coupling structure enables the filter to be tuned to any central frequency in the range of 160 MHz to 360 MHz, and to maintain its high-Q and excellent rejection, insertion loss, and center return loss performance for de-confliction filtering, military mobile/mounted VHF/UHF communication systems, and base station antenna filter applications.