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66-88MHz Duplexer, 6-cavity

66-88MHz Duplexer, 6-cavity Mobile or Base Station

Part # DPF4/6-HX-150. Categories: , . Tags: , , , , , .


The DPF 4/6-HX-150 is a six-cavity high-power mobile or base station duplexer for the 68 – 88 MHz band.

This type of filter uses six large 40 x 40 mm cavities, all equipped with 3.5 mm silverplated helical resonators, 19 mm diameter.

The use of large cavities and resonators means higher Q, resulting in smaller duplex spacing with lower loss.

The larger dimensions extend power rating to 100 W continuous.

The DPF 4/6-HX-150 is designed for single-channel equipment, but can, with slightly reduced data, be broadband-adjusted to allow multichannel equipment to be used.

The cavities are made of extruded aluminium, the chassis of passivated steel. All coaxial cables are of the semi-rigid type, and teflon has been used in all connectors and cables.

The filter is black vinyl coated to prevent corrosion.

Please specify the frequencies for TX and RX when ordering, as all filters are made individually.


Frequency 68-88 MHz (88-112 MHz)
Minimum Spacing 800 kHz
Insertion Loss @ 1.0 MHz spacing: 1.5 dB
@ 1.5 MHz spacing: 1.2 dB
@ 3.0 MHz spacing: 1.0 dB
Impedance 50 Ω
Tx Noise Suppression on Rx-Frequency /
Rx Isolation on Tx-Frequency
@ 1.0 MHz spacing: 70 dB
@ 1.5 MHz spacing: 80 dB
@ 3.0 MHz spacing: 100 dB
VSWR < 1.5:1
Maximum Input Power 100 W @ 1 dB insertion loss


Connection(s) N(f)
Dimensions 210 x 250 x +50 mm
Weight 2.5 kg


Operating Temperature Range -30°C to +60°C
Frequency Stability 8 ppm/° C (approx.)