STRIDSBERG ENGINEERING
Raven Signals
Shreveport - Louisiana - USA
Military - Government - Commercial

FM Notch Filter

FLT201A

Receiver FM Notch Filter.
88 - 108 MHz
For use on all
scanners and
wide-band
receivers

Frequency:  88 MHz to 108 MHz
Type:  3 resonant trap
Impedance:  50 Ohms
Notch:  > 60 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

225 MHz HPF

FLT225

Primarily designed for monitoring of radio services above 225 MHz. Good rejection of paging and FM signals

High Frequency Filters

1.9 MHz HPF / BCB Reject

FLT02AM

Primarily designed for HF monitoring of radio services above 2 MHz. Good rejection of BCB (AM) signals.

For use with all communications receivers and HF multicouplers such as MCA102M
MCA104M
MCA108M

Other Filters Available:

FLT03   3 MHz HPF
FLT10   10 MHz HPF

Please contact factory for
information

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)
Optional "N" Connectors available
Size:  2 x 2 x 1-1/4 Inches
 

  Please contact factory for other filter frequencies

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.

Note: Coaxial interconnect cables are available. RG-58A/U with BNC male connectors, sweep tested to 1.5 GHz. Please refer to price list.

Prevent RF Overload From Strong Signals
Reduce Image Mixing - Less Spurious Trash
Reduce Broadband Noise & IMD