STRIDSBERG ENGINEERING, LLC
Raven Signals

Shreveport - Louisiana - USA
Military - Government - Commercial

          

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Receive Filters

FM Notch Filter

FLT201A

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

 


 

Purchase FLT201A below
Connector Options
Specifications

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

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

NOTE: Same enclosure as FLT201A above

Purchase FLT225 Below
Connector Options

 

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

Purchase FLT02AM below
Connector Options

 

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

 

 
 
NOTES

ball-blu.gif (131 bytes)  Please contact factory for other filter frequencies

ball-blu.gif (131 bytes) 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).

ball-blu.gif (131 bytes) 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.


ball-blu.gif (131 bytes) 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.


ball-blu.gif (131 bytes) ball-blu.gif (131 bytes) ball-blu.gif (131 bytes)

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

ball-blu.gif (131 bytes) ball-blu.gif (131 bytes) ball-blu.gif (131 bytes)

 

  Receive Filters - Stock Models
Contact factory for other frequencies

For help with selection refer to "Tech Notes".
For Sales & Ordering, please go to "Sales Info".

Model Type Frequency Range Con. Price
High Frequency Filters
FLT02AM HPF 1.9 MHz High-Pass-Filter,  BCB Reject Filter BNC (M/F) $98.00
FLT02AM/N HPF 1.9 MHz High-Pass-Filter,  BCB Reject Filter N (F/F) $115.00
FLT02AM/T HPF 1.9 MHz High-Pass-Filter,  BCB Reject Filter TNC (F/F) $115.00
FM Notch and VHF/UHF Filters
FLT201A Notch 88 MHz to 108 MHz FM Band BNC (M/F) $98.00
FLT201A/T Notch 88 MHz to 108 MHz FM Band TNC (F/F) $115.00
FLT201A/N Notch 88 MHz to 108 MHz FM Band N (F/F) $115.00
FLT225 HPF 225 MHz High Pass Filter BNC (M/F) $98.00
FLT225/T HPF 225 MHz High Pass Filter TNC (F/F) $115.00
FLT225/N HPF 225 MHz High Pass Filter N (F/F) $115.00

 

Technical Questions ?
Please use the email address below to submit technical questions,
request a quote/estimate or other information you may need.
We will respond promptly via email. If you like to be contacted by
phone or fax, please include those phone numbers.
Email:  stridsberg@bellsouth.net

Stridsberg Engineering, LLC
354 Albert Avenue
Shreveport, LA 71105, USA
DoD cage Code: 3RQT1
Tel: (318) 861-0660  Fax: (318) 861-7068
Last modified:
December - 2013