Legal and Copyright Notices


None. We do not guarantee that this site will contain the specific information you require; we do not guarantee that the information is complete, accurate or legible; we do not guarantee that the information contained on this site is interoperable with other products; we do not guarantee the merchantability or fitness for a particular purpose of this site nor its contents; and we do not guarantee that procedures and wiring described in the site's contents are safe or compliant with modern electrical and product safety codes.


The information on this site is intended for qualified electronics servicepersons only. Tube radios, when operating, contain high voltages that can cause serious injury or death. Faulty tube radios can also contain potentially dangerous short circuit conditions which can cause fire or release of noxious gases. Some radios may contain asbestos and other hazardous materials. YOU ASSUME ALL RISKS associated with servicing tube-era products.

By using this site, you agree to indemnify and hold harmless Whirlwind Software, its principals and servants, and its partners and agents, against all claims of liability arising from your use of this site.

If you access this site in any way, you indicate your agreement to these terms. If you do not agree to these terms you must immediately disconnect from this site.


This site is, in whole, the copyrighted intellectual property of Whirlwind Software and may not be duplicated in any way or for any purpose except that of making a single printed copy of each page for the purpose of servicing radios. The diagrams from which this site was compiled are in the public domain. The source of the information on this site is the single-sheet service information published by the Radio College of Canada between 1938 and 1948. Copyright in Canada subsists until the end of the 50th year following the death of the author, or in the case of photographs until the end of the 50th year following the first publication. Also, the Radio College of Canada never published the names of the authors (engineers, draughtsmen, documentation writers) and may itself have never possessed that information, which means that the personal authorship of the technical information is unknown. In the case of unknown or collective authorship, copyright in Canada also lasts until the end of the 50th year after the date of first publication. Since the latest first publication of diagrams and information on this site was in 1948, the last copyright on a diagram and associated information on this site expired on January 1st, 1999.

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