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STRIDSBERG

Electronics for Radio Surveillance & Monitoring - SIGINT/COMINT

Military - Government - Commercial

Receive Filters Bias-Tee Accessories

Categories

Multicouplers

Pre-Amplifiers

Receive Filters

Bias-Tee

Accessories

Multicouplers Pre-Amplifiers

Made In USA

FLT201A & FLT201A/N

FM Notch Filters

Specifications

Frequency:  88 MHz to 108 MHz
Type:  5 Pole Chebyshev
Impedance:  50 Ohms
Notch:  > 45 dB @ 98 MHz
Insertion Loss:  < 1 dB @ 500 MHz
Connectors:  BNC (M/F)
Optional connectors: N-type (F/F),  TNC (F/F)
Size:  2 x 2 x 1-1/4 Inches
Die cast aluminum, Black powder coat

Purchase FLT201A below

Connector Options

Receive filters are sometimes necessary to enhance the performance of broadband radios. The basic FM Notch filter, FLT201A (FLT201A/N, FLT201A/T), is a very useful complement to any monitoring site were VHF and UHF signals are monitored on a regular basis. It is specially important in metropolitan and suburban areas were FM signals are very strong compared to many other radio signals. Possible problems with strong signals, such as those from FM radio transmitters are:

1.  RF overload (reduces receiver sensitivity, increases noise)

2.  Image mixing (two strong signals mix and produce a third undesired signal).

The FLT225 is a High-Pass filter designed primarily for radio monitoring of the military band  (225 MHz to 400 MHz). This filter effectively attenuates signals below about 225 MHz, such as Paging (152/158 MHz), FM Radio and other strong business band radios.

The FLT225 uses the same die cast aluminum enclosure as the FM filter above, with male/female BNC connectors.

FLT02AM is designed primarily as a BCB (AM radio) reject filter in the form of a 7-section High-Pass-Filter. It can be used in any receiver monitoring platform including as a complement to the Stridsberg Engineering HF multicouplers, MCA102M, MCA104M and MCA108M. We have also available special use filters such as FLT03 3 MHz High-Pass Filter and FLT10 10 MHz High-Pass Filter.

Receive Filters

225 MHz High-Pass Filter

Specifications

Frequency:  225 MHz High Pass Filter
Type:  5-Section High Pass
Impedance:  50 Ohms
Band Pass Loss: < 1 dB @ 500 MHz
                          < 2 dB @ 1000 MHz
Connectors:  BNC (M/F)
Optional connectors: N-type (F/F),  TNC (F/F)
Size:  2 x 2 x 1-1/4 Inches
Die cast aluminum, Black powder coat


NOTE: Same enclosure as FLT201A above

Purchase FLT225 below

Connector Options

1.9 MHz HPF / BCB Reject

Specifications

Frequency:  1.9 MHz High Pass Filter
Type:  7-section High Pass
Impedance:  50 Ohms
Band Pass Loss: 1.5 dB max. to 50 MHz
Connectors:  BNC (M/F)
Optional connectors: N-type (F/F),  TNC (F/F)
Size:  2 x 2 x 1-1/4 Inches
Die cast aluminum, Black powder coat

 

Purchase FLT02AM below

Connector Options
ATTENUATION - dB 0 10 20 30 40 50 60 70 FREQUENCY - MHz 2.5 2.0 1.5 1.0 0.5 3.0 3.5 4.0 4.5 5.0 5.5

NOTE: Same enclosure as FLT201A above

Typical Frequency Response

Typical Frequency Response

Stridsberg Engineering, LLC.  -   Shreveport, Louisiana, USA - (318) 861-0660