N2CBU's Technical Information Resource

... as always, under construction ...

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Icom RAM Module Technical Information:

RAM Module Programming Utility (ZIP)

README for RAM Module Programming Utility

Icom R71A Receiver Technical Information:

R71A Component Placement Diagrams (ZIP)

R71A Schematic Diagrams (ZIP)

R71A Modifications

Icom R71A Receiver Manuals:

R71A User Manual (PDF)

Manual for EX-257 FM Unit (PDF)

Manual for EX309 Interface (PDF)

Manual for UX14 Interface (PDF)

Manual for RC11 Remote Control (PDF)

Radio Shack DSP40 Audio Filter Info:

DSP40 Service Manual & Schematics (PDF)

DSP40 Schematic, Part 1 (B&W GIF)

DSP40 Schematic, Part 2 (B&W GIF)

DSP40 Modifications