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.
- Audimax 4450A stereo level controller updated and expanded user manual (PDF)
- Collins 310Z-2 FM exciter updated and expanded user manual (PDF)
- Collins 310Z-3 FM exciter replacement front panel layout (PDA)
- Collins 310Z-2 FM exciter replacement card cage front panel (PDA)
- Harris Criterion 90 Stereo Record/Play cart machine faceplate trim piece (PDA)
- Harris Criterion 90 Mono Record/Play cart machine faceplate trim piece (PDA)
- Harris Criterion 90 Stereo playback cart machine faceplate trim piece (PDA)
- Harris Criterion 90 Mono playback cart machine faceplate trim piece (PDA)
- Harris Criterion 90 Record/Play cart machine replacement cabinet (PDA)
- Harris MSP100 audio processor 19-inch rack ears (PDA)
- TFT 763 FM monitor rear panel layout and legends – AI format / PDF format / PDA format
- TFT 763 FM monitor front panel trim piece – AI format / PDF format
- TFT 7601 Remote Control front panel trim piece – AI format / PDF format
- TFT 7601 Remote Control front panel functional description card – DOCX 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.
- Moseley PCL-505 STL transmitter replacement front panel layout (PDA)
- Moseley PCL-505 STL transmitter documentation describing the implementation of a rotary meter input switch (PDF)
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.
- 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.
- WA-6034 preamplifier replacement board for the Gates M-6034
- WA-5700 line amplifier replacement boards for the Gates M-5700
- WA-6035 cue/intercom amplifier replacement board for the Gates M-6035
- WA-6108A monitor amplifier replacement board for the Gates M-6108A
- WA-6205 power supply replacement board for the Gates M-6205
- WA-6001 mute/warning light relay panel replacement board for the Executive console relay assembly
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.
- WA-6033 stereo preamplifier based on the Gates Integrated Circuit Phono Preamplifier, 994-6690-001 (ZIP)
- WA-6031 test tone generator for setting studio levels (rack-mount using RDL modules)
- WA-6110 monitor “cue dim” controller for automatically decreasing monitor volume when cueing input sources (rack-mount using RLD module)
- WA-6012 remote control six-position cart machine/reel-to-reel station
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.
- WA-6600 preamplifier PCB circuit description and measured performance
- WA-6169 phono preamplifier PCB circuit description and measured performance
- WA-6107 power amplifier PCB circuit description and measured performance
- WA-6205B dc power supply PCB circuit description and measured performance
- WA-6111 monitor cue/dim controller PCB circuit description and measured performance
- WA-6032 audio signal generator PCB circuit description and measured performance
- WA-6011 machine control PCB circuit description
- WA-6030 input interface PCB circuit description
- WA-6204 ac power supply circuit description
The following documents were developed during restoration projects on other Gates studio gear.
- Gates Solid Statesman FM Limiter typical measured performance (PDF)
- Gates M-6321 Line Amplifier specifications and measured performance (PDF)
Automation System
The following documents were developed for the Studio Three automation system project as described in the blog of the same name.
- Studio Three Automation System – Installation, Operation, and Maintenance. This document provides details on the automation system, focusing on interfaces between the Gates SSC controller and the program source machines (PDF).
- WA-6002 End of Message Detector circuit description and measured performance
- WA-6003 Sub-audible Filter circuit description and measured performance
- WA-6004 DTMF Decoder circuit description and measured performance
- WA-6005 DTMF Encoder circuit description and measured performance
- WA-6006 EOM Detector circuit description and measured performance
- WA-6014 Carousel Controller circuit description and measured performance
- WA-6015 AG-440 Controller circuit description and measured performance
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.
- AG-440 record amplifier typical performance in a bench test environment (PDF)
- AG-440 reproduce amplifier typical performance in a bench test environment (PDF)
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.
- IG 37 FM Stereo Generator front panel layout – AI format / PDF format
- IG 1275 Lin/Log Sweep Generator front panel layout – AI format / PDF format
- IG 5218 Audio Signal Generator front panel layout – AI format / PDF format
- IM 25 Volt-Ohm Multimeter front panel layout – AI format / PDF format
- IM 4110 Frequency Counter front panel layout – AI format / PDF format
- IM 4120 Frequency Counter front panel layout – AI format / PDF format
- IM 5225 FET Volt-Ohm Multimeter front panel layout – AI format / PDF format
- IM 5238 AC Voltmeter front panel layout – AI format / PDF format
- IM 5248 Intermodulation Distortion Analyzer front panel layout – AI format / PDF format
- IM 5258 Harmonic Distortion Analyzer front panel layout – AI format / PDF format
- IO 4510 Dual Trace Oscilloscope front panel layout – AI format / PDF format
- IP 27 Low Voltage DC Power Supply front panel layout – AI format / PDF format
- IP 2710 Low Voltage DC Power Supply front panel layout – AI format / PDF format
- IP 2717 High Voltage DC Power Supply front panel layout – AI format / PDF format
- IP 5220 Variable AC Power Supply front panel layout – AI format / PDF format
- Heathkit Audio Test Load front panel layout – AI format / PDF format
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.
- 20 W Stereo Amplifier project files
- 40 W Stereo Amplifier project files
- 40 W XL Stereo Amplifier project files
- 60 W Stereo Power Amplifier project files
- 20/40/60 W Amplifier Add-on Boards project files
- Stereo Preamplifier project files
- Series II XL Integrated Stereo Amplifier – Operation, Assembly, and Maintenance Manual
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.