Some filters similar to this have useful bandpass characteristics and acceptably low insertion loss (around 3dB), so may be seriously useful for 472-479kHz rigs and transverters. For example, as a roofing filter to protect a RX after a small gain stage, or as a filter to clean up the output of a transverter at low level before applying a signal to a driver and PA. I guess they must also be useful in a ceramic stabilised oscillator. Anyone used these in similar applications?
They claim that it is a SFU465B filter. However, as far as I know Murata uses the next type number convention :
ReplyDeleteLLL NNN T
where LLL is the the series name, NNN is the center freq. in KHz, and T is the type.
So a SFU465B should have a centre freq of 465 KHz.