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BPF 8/3

Band-Pass Filter for the 8 m Band
Description
  • 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 watt of output power.
  • The BPF 8/3 is a 3-helical resonator band-pass filter with aperture-coupling between the resonators.
  • The filter 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 passivated steel, and teflon insulation has been used in the coaxial cables and in the connectors.
  • The filter is black vinyl coated to prevent corrosion.
  • Band-pass filters similar to the BPF 8/3 but with pass-band frequency between 30 and 66 MHz may be quoted on request.
Specification
Electrical
Filter Type Band-pass filter
Frequency 32 – 42 MHz
Max. Input Power 50 W
Insertion Loss ≤ 1.8 dB (typ. ≤ 1.5 dB)
Impedance 50 Ω
Reject Attenuation See curves
VSWR ≤ 1.5:1
Bandwidth See curves
Environmental
Frequency Stability Approx. 10 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 Procom
Dimensions 175 (incl. conn.) x 77 x 33 mm / 6.88 x 3.03 x 1.30 in.
Weight Approx. 0.39 kg / 0.86 lb.
Ordering Codes
Model Product No.
Band-Pass Filter for the 8 m Band 200000894
Additional Information
Typical Response Curves

BPF-8-3-kurve1

BPF-8-3-kurve2

BPF-8-3-kurve3

PLEASE NOTE

BPF 8/3 provided with other connector types, or filters similar to the BPF 8/3 but with pass-band frequency between 30 and 66 MHz may be quoted on request.

PROCOM A/S reserves the right to amend specifications without prior notice
PROCOM A/S • Smedetoften 12 DK 3600 Frederikssund • Denmark
Generated : 2026-06-24 Version 1