This database started as a simple collection of tidbits about a few Superhets and quickly grew substantially. Additional descriptions would mandate more depth to the database's structure. Definitions originally too broad had to be more finitely defined. But, soon it was apparent much more information would be needed to narrow a search for a specific radio. The database's original form would not be recognized today.
The main focus of this database is provide a collector with research information about a specific Superhet or a variation and its year of introduction. From that point, availability of schematics, layouts, construction info, and ads can be determined. To find the "make" of a Superhet, knowing the manufacturer of the set's intermediate transformers (IFs) is critical. Without a name on the IFs, a collector must identify a radio by the shape of the IFs, the number of tubes and the types used, length of the front panel, number of tuning dials, and any additional knobs on the front panel. All would be important factors.
For the restoration of the radio, a collector might appreciate the peak frequency of the IFs or the design of the IF/Filter's core. As with all other information, where available, the city of origin is also noted.
Familiarize yourself with the database key. Note the link at the bottom of this page.
A red area on the database indicates a serious question as to the information or the info is seriously incomplete. It also might indicate a duplication of info shown elsewhere. Yellow areas indicate missing information that's likely available but not shown or the information simply needs to be rechecked. Red numbers on the "Major Tuning Dials" field indicates more than the typical one or two dials.
Information shown in parenthesis () indicates an educated guess. Dates and peak IF frequencies are the majority of these. Brackets  just separate information. A tube notation like "8 [+2 A-C]" means there were 8 main tubes in the set with 2 other tubes used as rectifiers and/or outboard audio tubes and that the set was run from AC rather than from batteries.
In reproducing the database into a web page, some of the fields don't center as they do on the original Excel spreadsheet. Hope it isn't confusing. And, the physical size of the database grew when it was converted to a web page. I'll work on that.
To use the database, first look up any name present on the front panel. Check the database. If no match is found, determine the manufacturer of the IFs and look that up. From there, compare specifics of your set with the database notations. Don't get discouraged. There's likely more information available than what is shown on the database. If all else fails, you're welcome to contact me via email or by the TOLL FREE telephone number below.
Every attempt has been made to provide correct information as taken from as many resources as possible. I have hundreds of magazines and catalogues of the era. It's a work in constant progress. Some notations will change over time. Please, use my database, but don't abuse my years of work. Thank you. Rick