Procom Filters
A professional range of VHF and UHF band-pass, notch, and pass-reject filters designed to reduce interference and protect radio communication systems. Covering frequency ranges across 136–175 MHz, 144–175 MHz, 380–470 MHz, and 406–470 MHz, these filters are suitable for use with transmitters, receivers, preselectors, and multi-coupling systems.
The range includes 3- and 4-resonator notch filters, compact helical resonator band-pass filters, and pass-reject filters for applications where close frequency spacing requires high selectivity. Built with carefully selected materials for reliable operation over a wide temperature range, these filters can be supplied in multiple model variations to suit required frequency bands, pass/reject spacing, and system requirements.
BPF 70/3
The BPF 70/3 is a 3-resonator notch-filter using full-length ¼ λ cavities.
This filter rejects a narrow band of frequencies and passes all others. The filter can be applied both in connection with transmitters and receivers to attenuate interfering signals which cause cross modulation effects. The filter can be employed as a single component or it can act as an integrated part of a complete multi-coupling system.
The BPF 70/3 can be tuned within the complete 406 – 470 MHz band. Careful design and choice of materials ensure reliable operation over a wide temperature range.
BPF 70/4
The BPF 70/4 is a 4-resonator notch-filter using full-length ¼ λ cavities.
This filter rejects a narrow band of frequencies and passes all others. The filter can be applied both in connection with transmitters and receivers to attenuate interfering signals which cause cross modulation effects. The filter can be employed as a single component or it can act as an integrated part of a complete multi-coupling system.
The BPF 70/4 can be tuned within the complete 380 – 470 MHz band. Careful design and choice of materials ensure reliable operation over a wide temperature range.
