BPF 4/4
Band-Pass Filter for the 80 MHz Band
Description
- The BPF 4/4 is a 4-helical resonator band-pass filter with aperture-coupling between the resonators.
- This filter can be used as a preselector to protect a receiver against interference from transmissions out of the pass-band, or it can be used to reduce spurious output from a transmitter with up to 50 W of output power.
- The BPF 4/4-C-version fits directly into our receiver multicouplers PRO-AR4G-N… etc.
- The filter can be tuned within the entire 66 – 88 MHz band. It has very small dimensions owing to the use of helical resonators. Careful design and choice of materials ensure reliable operation over a wide temperature range.
- The housing is made of extruded aluminium, the chassis of steel, and teflon insulation has been used in the coaxial cables and in the connectors.
- The filter is coated with black vinyl to prevent corrosion.