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DPF 2/6-SHT-…

6-Cavity Duplexer for the 175 - 250 MHz Band
Description
  • The DPF 2/6-SHT-… is a 6-cavity duplex filter for duplex radiotelephones.
  • This duplexer is delivered in a low band version type
    DPF 2/6-SHT- L, tunable within 175 – 200 MHz, medium band version type DPF 2/6-SHT-M, tunable within 200 – 230 MHz and a high band version type DPF 2/6-SHT-H, tunable within 230 – 260 MHz. These models are again delivered in 3 submodels, each dedicated to work with a certain duplex spacing.
    See ordering information under the tab “Specifications” below.
  • The DPF 2/6-SHT-… models are primarily intended for equipment, where the Tx and Rx operate on single frequencies, but they can also, however with slightly reduced data, be used where the Tx and Rx operate on several channels, i.e. within a certain port bandwidth. In the last case, factory tuning is recommended.
  • 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 2/6-SHT-…
Frequency DPF 2/6-SHT-L : 175 – 200 MHz
DPF 2/6-SHT-M : 200 – 230 MHz
DPF 2/6-SHT-H : 230 – 260 MHz
Max. Input Power 50 W
Special spec. info
Single-channel tuned :Multi-channel tuned
BW = 1.5 MHz :
Insertion Loss Tx-Ant and Ant-Rx
< 1.2 dB (typ. 1.0 dB)< 1.4 dB (typ. 1.2 dB)
Tx Noise Suppression on Rx Frequency
> 80 dB> 60 dB
Isolation Rx on Frequency Tx
> 80 dB> 60 dB
Impedance 50 Ω
Duplex Spacing 4 – 10 MHz (adjustable)
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 191 x 154 x 33 mm
7.5 x 6 x 1.2 in.
Weight Approx. 0.8 kg / 1.76 lb.
Ordering Codes
Model Product No. FrequencyAdditional Information

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

 200001852 175 – 200 MHz SPACING: 4 – 6 MHz

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

 200001853 175 – 200 MHz SPACING: 6 – 8 MHz

DPF 2/6-SHT-L-8/10-N(f)

 200001854 175 – 200 MHz SPACING: 8 – 10 MHz

DPF 2/6-SHT-M-4/6-N(f)

 200001855 200 – 230 MHz SPACING: 4 – 6 MHz

DPF 2/6-SHT-M-6/8-N(f)

 200001856 200 – 230 MHz SPACING: 6 – 8 MHz

DPF 2/6-SHT-M-8/10-N(f)

 200001857 200 – 230 MHz SPACING: 8 – 10 MHz

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

 200001858 230 – 260 MHz SPACING: 4 – 6 MHz

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

 200001859 230 – 260 MHz SPACING: 6 – 8 MHz

DPF 2/6-SHT-H-8/10-N(f)

 200001860 230 – 260 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 duplexer are delivered factory adjusted. If Tx and Rx frequencies are not stated, the filters are delivered non-adjusted.

Please Note

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 Curves @ 4.5 MHz Duplex Spacing

DPF 2!6 SHT H 4 6 GB

Typical Response Curves @ 9 MHz Duplex Spacing

DPF 2!6 SHT L 8 10 GB

Diagrams

TYPICAL RESPONSE CURVES @ 9 MHz DUPLEX SPACING

TYPICAL RESPONSE CURVES @ 4.5 MHz DUPLEX SPACING

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