Available Downloads

While working on the various projects described on this web site, we have accumulated a great deal of documentation and project files that we are happy to share with folks interested in classic equipment restoration. The files below are housed on a Microsoft SharePoint drive. They are provided free of charge.

Although a formal disclaimer seems excessive, nonetheless we want to state that: 1) The files linked below are for personal use of the web site visitor. 2) They are provide as-is. 3) No warranty or technical support is expressed or implied. 4) Every effort has been made to ensure that each download is complete and accurate, however no guarantees can be given for work or projects that may result from the information contained therein.

Sorry about all that, but it’s best to get the disclaimer out of the way at the top of the page.

We hope you will find these files helpful in your own restoration work.


1970s Radio Studio Project

The downloads listed below are the byproduct of work to build the 1970s Radio Studio. The PDF files are in the Adobe Acrobat format. The PDA files are in the ProtocaseDesigner format. The AI files are in the Adobe Illustrator format. The DOCX files are in the Microsoft Word format.

The 1970s radio studio includes two Moseley PCL-505 transmitters, one in the 450 MHz band and another in the 950 MHz band. For both of those units, the front panel pushbutton switch assembly was nonfunctional, with no reasonable possibility of repair. The decision was made, therefore, to dispense with the pushbutton assembly and use a conventional rotary switch. That change necessitated producing a new front panel. The following files are available for this approach.


Gates Executive Audio Console Project

The downloads below are the byproduct of work to restore the Gates Executive Audio Console.

  • Gates Executive Audio Console, Volume I – Operation, Installation, and Service Manual. This document is an updated version of the original Gates manual (PDF).
  • Gates Executive Audio Console line drawing master schematic (PDF).
  • Gates Executive Stereo Audio Console, Volume II – Circuit Board and Systems Upgrades. This document provides details on new and replacement circuit boards and other upgrades for the Executive console. (coming soon)
  • Gates Executive Stereo Audio Console, Volume III – Implementation and Systems Integration. This document provides implementation guidance and detailed in-service performance measurements.

The updated and expanded Executive console user manuals (Volumes I, II, and III) are also available in printed form. See the Available Printed Documents blog.

As documented in the Gates Executive Restoration blogs Part 1 and Part 2, it was necessary during restoration work to remanufacture circuit boards used in the console. The new boards maintain plug-in compatibility with the the original boards but utilize modern components. The original circuit design is maintained, with the addition of several changes designed to improve reliability and performance.

Each of the following downloads include all information needed to reproduce these circuit boards. The ZIP files include: 1) The schematic diagram in PDF and SCH versions. 2) The Bill of Materials in an Excel spreadsheet. 3) The PCB layout in PDF and PCB versions. 4) A detailed user manual in PDF. 5) The chassis layout (where applicable) as a PDA file.

The PDF files can be read by Adobe Acrobat. The SCH and PCB files can be read by software available from ExpressPCB. The PDA files can be read by software available from Protocase. These programs can be downloaded at no charge. Check the websites for additional information.

Note that the boards listed above were used in several of the Gates consoles manufactured during the 1960s and 70s.

The following projects were developed as peripheral hardware for the Executive audio console.

The following documentation provides details on the new PC boards described in Part 3 of the Gates Executive Audio Console blog. The documents are in the PDF format.

The following documents were developed during restoration projects on other Gates studio gear.


Ampex AG-440 Tape Deck

The downloads below are the byproduct of work to restore the Ampex AG-440 reel-to-reel tape deck as described in the blog of the same name.


Heathkit Polycarbonate Overlays

The Heathkit IM 5248 Restoration Project and Heathkit Refurbishment Gallery blogs document the replacement of instrument front panels with polycarbonate overlays produced by MetalPhoto of Cincinnati (MPC). The files listed below are in the Adobe Illustrator (AI) format. They can be used by MPC (or other vendors) to produce polycarbonate overlays. Adobe Acrobat (PDF) versions are also provided.


Vacuum Tube Amplifier Projects

Complete project files for the amplifiers described in the Vacuum Tube Amplifier Projects blog are available for download below.

Each of the following downloads include all information needed to reproduce these products. The ZIP files include: 1) The schematic diagram in PDF and SCH versions. 2) The Bill of Materials in an Excel spreadsheet. 3) The PCB layout in PDF and PCB versions. 4) A detailed user manual in PDF. 5) The chassis layout as a PDF file. 6) The front panel layout as an FPD file.

The PDF files can be read by Adobe Acrobat. The SCH and PCB files can be read by software available from ExpressPCB. The FPD files can be read by software available from Front Panel Express. These programs can be downloaded at no charge. Check the websites for additional information.

The user manuals for these projects are also available in printed form. See the Available Printed Documents blog.


Please let us know if you have any questions about these downloads. Use the Contact Us form.