1. Complete part list showing all resistors, capacitors and semiconductors keyed to the photos showing their specific location on the PC board or chassis. A total of 18 pages in PDF.

2. Full color, high resolution photos of the chassis and each PC board (excluding PTO) with each part identified. Sized to print out on 8.5" x 11" pages, or may be enlarged on screen for a closer look.  A total of 32 photos in PDF.

3. Never before published schematic and other information about the Passband Tuner. 

4. R-4A Data based on Early Version 41664030 [April 1, 1966, s/n 3040], or Late Version 1026665400 [10/26/66 s/n 5400+ Revised].  Additional schematics only (2007, 3040, 4054 and 5400) for earlier versions are included.

5. T-4XB Data based on S/N 11600+, Revised.  Three additional schematics only (10000) for the earlier versions are included.

6. Full high-resolution PDFs of Original Manuals for the R-4A and T-4X. A total of 86 pages in PDF.  Manuals for related models C-4, FS-4, L-4B, MN2000, W-4, ++ are also included.

7. Miscellaneous additional files, Errata sheets and Alignment pages.  A total of 148 pages in PDF.

All files are in Adobe Portable Document Format, and are readable on Windows and most non-Windows platforms, (including MAC OS 9 and OS X,) with the appropriate free reader from Adobe.

The files are available for download for $25, Early and Late BOTH for $40.  A CD can be provided for an additional $5 to US addresses ONLY.  Postage charges to other countries on request.  PayPal ( k4oah@mindspring.com ), cash, check or MO to:

Garey Barrell, K4OAH
2738 Kingston Hwy SE
Rome, GA  30161-9154

Every effort has been made to ensure the accuracy of the drawings and text included on this CD. Corrections and/or suggestions for additions are welcome.