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> (3) 455 khz if murata ceramic filters - ham / shortwave
(3) 455 khz if murata ceramic filters - ham / shortwave
Datasheet: CFS CFL Filters (869K PDF)
Datasheet: CFU Filter (60K PDF)
(View additional application links below.)
Wide operating temperature: -20 to 80 C ( -4 to 176 F )
The CFL and CFS units are shielded in metal cans with ground tabs.
The CFS filter has an exceptional (15) elements to produce a narrow pass-band with deep and steep skirts required for optimum Shortwave AM reception. Install in the intermediate or final IF stages for best performance.
The CFL filter has a wider pass-band for broader bandwidth signals such as wide-AM, NBFM, digital, etc. They perform best at the front-end of the IF strip. Install just after the mixer or between the 1st and 2nd IF stages to provide the intitial, critical out-of-band rejection, and a clean signal for further amplification.
The CFU filter can also be used as a resonator in a 455 KHz BFO circuit for CW and SSB detection. Two examples for experimentation: BFO #1, BFO #2.
These are high-performance filters designed for high-performance communications receivers. The selectivity of a combination of CFL at the front-end and a narrow CFS at the back-end of a Shortwave Receiver IF amplifier will rival those high-end HAM / SWL / Commercial Radios.
Upgrade your HAM, SWL, Shortwave Receiver.
Here's a few typical Application Schematics:
Example 1: Adding a Ceramic Filter to an IF Strip
Example 2: Replacing a Crystal Filter with a Ceramic Filter
Example 3: Ceramic Filter driving a Product Detector
Example 4: IF Strip Before and After
Miscellaneous application infomation:
muRata Piezo Filters Introduction (160K PDF)
Ceramic Filter History (670K PDF)
Cerafil Application Manual (695K PDF)
Note: CFL and CFS muRata Ceramic Filters are serialized.
