Procom BPF 8-3 - Manual

BPF 8/3
Band-Pass Filter for the 8 m Band
DESCRIPTION
The BPF 8/3 is a 3-helical resonator band-pass filter with aperture-
coupling between the resonators.
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 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.
ORDERING DESIGNATIONS
TYPE PRODUCT NO.
BPF 8/3 200000934
SPECIFICATIONS
ELECTRICAL
FILTER TYPE Band-pass filter
TUNING RANGE 32 - 35 MHz
MAX. INPUT POWER 50 W
INSERTION LOSS ≤ 1.5 dB
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
FREQ. STABILITY Approx. 10 ppm/° C
CONNECTORS BNC-female (others on request)
DIMENSIONS (L x W x H) 175 (incl. conn.) x 77 x 33 mm
WEIGHT Approx 390 g
TYPICAL RESPONSE CURVES
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 reserve the right to amend specifications
without prior notice.
25/01/11