Free Information
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Philco 90 Operating Instructions
The Philco 90 is a classic AC electric screen grid superheterodyne receiver featuring Philco’s advanced electro-dynamic speaker system. Equipped with nine tubes for powerful, balanced performance, this vintage radio delivers rich tone control, automatic volume regulation, and precise station tuning. Designed for superior reception with proper aerial and grounding, the Philco 90 represents the craftsmanship and innovation of early 1930s radio engineering by the Philadelphia Storage Battery Company
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Coil Winder Instructions Submitted By Etech
The first file is an article written by Gary Tempest of the U.K. describing how to build a home brew coil winding machine for little money. The second file is part 2 of the first article describing some worthwhile modifications to the machine. Part 2 also has information about how to use the machine to wind inter stage audio transformers with it.
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Philco Vacuum Tube Tester Model #7050
Here are the usage instructions, tube data, and schematic for this tube tester. They consist of small cards that are clipped into a two-ring binder in a compartment on the right side of the case. They were printed on both sides. This file has them printed on one side only. You could print them on the heaviest stock your printer can handle, and cut them to size, or glue them back to back if you have a glue that wouldn't wrinkle the paper.
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Precision Test Equipment Catalog with Prices (1950)
This 1950 Precision Apparatus Company catalog showcases a full line of professional radio, television, electrical, and laboratory test instruments. Featuring vacuum tube testers, VTVMs, signal generators, oscilloscopes, and multimeters, Precision equipment was built to deliver unmatched accuracy and reliability for service technicians and engineers. Known as the “Standard of Accuracy,” these instruments represent the golden era of American electronic testing innovation
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John Kopp's Zenith H500 Repair Log
Badrestorer (John Kopp)'s very popular and highly regarded H500 thread has been archived by Ed Morris and put into a simplified, easy to use PDF format. The thread has been edited to its essential information and organized into six easy to use chapters covering disassembly of the radio to cabinet restoration. It should be noted that the scope of John's thread goes far beyond the H500 Trans-Oceanic. This guide will be helpful in restoring all the 500 and 600 series Trans-Oceanics, and will be of help in restoring just about any AA5 radio.
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