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BPF 70/4-HX

Band-Pass Filter for the 450 MHz Band

DESCRIPTION

The BPF 70/4-HX 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 from

interference from transmitters outside the band-pass limits.

The BPF 70/4-HX-C (C = cable) can be installed directly into the PRO-

AR4G-N, PRO-AR8G-N and PRO-AR16G-N receiver multicouplers as a

preselector.

When installed in the output of a transmitter, the BPF 70/4-HX reduces

spurious signals.

The BPF 70/4-HX is adjustable over the range 406 - 470 MHz.

Very compact due to use of helical resonators.

Careful choice of materials ensures reliable functioning over a wide

temperature range.

Extruded aluminium sections, steel racks and coax cables and

connectors with teflon insulation ensure good mechanical strength.

The filter is black vinyl coated to prevent corrosion.

ORDERING DESIGNATIONS

TYPE PRODUCT NO.

BPF 70/4-HX 200000908

SPECIFICATIONS

ELECTRICAL

MODEL BPF 70/4-HX

FILTER TYPE Band-pass filter

TUNING RANGE 406 - 470 MHz

MAX. INPUT POWER 35 W

INSERTION LOSS ≤ 1.5 dB typ. 1.2 dB

0.5 dB BW MHz Min. 3 MHz

ATTENUATION AROUND PASS-BAND See curves

OUT OF BAND ATTENUATION See curves

IMPEDANCE Nom. 50 Ω

SWR ≤ 1.5

MECHANICAL

TEMP. RANGE –30° C → +60° C

CONNECTORS BNC-female (others on request)

DIMENSIONS (L x W x H) 115 x 104 x 33 mm

WEIGHT Approx. 430 g

TYPICAL RESPONSE CURVES

PROCOM A/S reserve the right to amend specifications

without prior notice.

03/12/12

BPF 70/4-HX 1

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Page 1 - BPF 70/4-HX

BPF 70/4-HXBand-Pass Filter for the 450 MHz BandDESCRIPTIONThe BPF 70/4-HX is a 4 helical resonator band-pass filter with aperturecoupling between the

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