Do it possible for any expert to give me the right bandwith of thoses two ceramics filters 10.7 mhz .
And what about if i put them all the same eg only with center frequency
And what if i remove them .
L have attached some pictures
Regards.

Here you go...

http://ukradio.info/Skywaves/PartMarkingGuide.pdf

Hello Mr Radium
You may already know this? Not all, but most receivers use 10.7mhz difference between the local oscillator and the received signal for demodulation! Eg if you want to receive 50mhz? your local oscillator might run at 60.7mhz! The purpose of the ceramic filter is to suppress all other unwanted mixed harmonics and boost the 10.7mhz that you want! If you remove the filters, spurious crap will cause problems!
Heres a vid to show mixing principles!

thank you both of you m8 for the very good explanations but i am still eronic i cannot lead to read the correct bandwidth of those two ceramic filters up oi need there bandwidth as on the schematic they said to use 10.7 mhz bandwidth respectively 280 and 180 khz if possible lead me to correct values if no can i use them in this case ?
pdf picture schematic inside rar file

Can't open the rar file.

https://www.sendspace.com/file/ajatgv

starnge Analyser it work to me i mirrored to sendspace it is a pdf extension and forum do not allow pdf extension thanks for looking to try solving my problem

Ok, so the big (wider) filter marked T10.7S is a Murata SFT10.7MS3-A, and it has a 180KHz bandwidth.

The other smaller filter marked L10.7A is a generic 280kHz filter, equivalent to Murata SFE10.7MA5-A.

Thank YOU Analyser .HUG