SRC-02 Version 1 with Butterworth passband input filters.
SRC-02 Version 2 with Cauer passband input filters.

INSIDE VIEW.
 

Version 1- Butterworth pb details Ver 1(bottom view) Butterworth pb

                                              

Version 2 -  Cauer pb filter details

 

SRC-02  Version 2 with Cauer pb filters  -  top view SRC-02  Version 2 with Cauer pb filters  - bottom view