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DPF 2/44

8-Cavity Duplexer for the 160 MHz Band
Description
  • The DPF 2/44… is a 8-cavity duplex filter for duplex radio transceivers.
  • This duplexer is delivered in a low band version type DPF 2/44 L, tunable within 138 – 156 MHz and a high band version type DPF 2/44 H, tunable within 152 – 175 MHz. These models are again delivered in 3 submodels, each dedicated to work with a certain duplex spacing. See Ordering information under the “Specifications” tab below.
  • The DPF 2/44… models are primarily intended for equipment, where the Tx and Rx operate on several channels, (multi-channel turned) i.e. within a certain port bandwidth.
  • The filter has very small physical dimensions owing to the use of high-Q, temperature compensated helical resonators.
  • The housing is made of extruded aluminium, the chassis of passivated steel, and teflon insulation has been applied in the rigid coaxial cables and in the connectors.
  • The filter is coated with black vinyl to prevent corrosion.
Specification
Electrical
Model DPF 2/44…
Frequency DPF 2/44 L : 138 – 156 MHz
DPF 2/44 H : 152 – 175 MHz
Max. Input Power 50 W
Special spec. info
Multi-channel tuned
BW = 1.5 MHz:Multi-channel tuned
BW = 5 MHz:
Insertion Loss Tx-Ant and Ant-Rx
< 1.4 dB (typ. 1.2 dB)< 1.4 dB (typ. 1.2 dB)
Spacing Tx-Rx 4 – 10 MHz (adjustable)
Tx Noise Suppression on Rx Frequency
> 90 dB> 65 dB
Isolation Rx on Frequency Tx
> 90 dB> 65 dB
Impedance 50 Ω
VSWR < 1.5:1
Environmental
Frequency Stability Approx. 5 ppm / °C
Operating temperature range -30 °C to +60 °C
Mechanical
Connection(s) N(f)
(BNC(f), TNC(f), UHF(f) or SMA(f) on request)
Historic Brand Amphenol Procom
Dimensions 196 (excl. conn.) x 104 x 56 mm /
7.72 (excl. conn.) x 4.09 x 2.20 in.
Weight Approx. 1.1 kg / 2.43 lb.
Ordering Codes
Model Product No. FrequencyAdditional Information

DPF 2/44 L-4/6-N(f)

 200002379 138 – 156 MHz SPACING: 4 – 6 MHz

DPF 2/44 L-6/8-N(f)

 200002380 138 – 156 MHz SPACING: 6 – 8 MHz

DPF 2/44 L-8/10-N(f)

 200002381 138 – 156 MHz SPACING: 8 – 10 MHz

DPF 2/44 H-4/6-N(f)

 200002382 152 – 175 MHz SPACING: 4 – 6 MHz

DPF 2/44 H-6/8-N(f)

 200002383 152 – 175 MHz SPACING: 6 – 8 MHz

DPF 2/44 H-8/10-N(f)

 200002384 152 – 175 MHz SPACING: 8 – 10 MHz
Additional Information
Ordering Information

When ordering, please use the table above to select the appropriate ordering designation for the desired filter type. If duplex Tx and Rx frequencies are stated when ordering, the duplexers are delivered factory adjusted. If Tx and Rx frequencies are not stated, the filters are delivered non-adjusted.

Special configurations of this filter type may be quoted on request. For instance, the filter can be delivered with other connector types or with flying leads (RG 316 coaxial cable) terminated with connectors or for soldering-connection.

Typical Response curve

DPF 2 44 curves

Mounting Details

DPF 2!44 Holeplacing

All dimensions are given in mm [in.]

Diagrams

TYPICAL RESPONSE CURVES @ 4 MHz DUPLEX SPACING & 5 BW

TYPICAL RESPONSE CURVES @ 4 MHz DUPLEX SPACING & 1,5 BW

PROCOM A/S reserves the right to amend specifications without prior notice
PROCOM A/S • Smedetoften 12 DK 3600 Frederikssund • Denmark
Generated : 2026-06-25 Version 1