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RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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Steinite 50-A and 102-A Radio Service Data Sheet
January 1930 Radio-Craft

January 1930 Radio-Craft

[Table of Contents]

Wax nostalgic about and learn from the history of early electronics. See articles from Radio-Craft, published 1929 - 1953. All copyrights are hereby acknowledged.

January 1930 was not long after Black Friday on October 29 of 1929. Buying radios was not at the top of everyone's priority list as most of the country scrambled to batten down the hatches for the economic storm on the horizon. Many top pundits thought the disaster would be short-lived, but it lasted for more than a decade. It took World War II to finally end the national malaise. The photo of the Steinite 102-A radio was found on the RadioMuseum.org website. It is a fancy console (floor) model.

Steinite 50-A and 102-A Radio Service Data Sheet

On the terminal strip of this receiver are mounted: the power-cable lugs; the grid leak and condenser; the detector-plate bypass condenser; the two center-tap resistors; and the 600-ohm and 2500- ohm "C-bias" resistors.

A special input circuit is used on the Steinite receivers, for the purpose of obtaining sensitivity. The circuit acts as an autotransformer when the antenna lead is connected at the junction between L1 and C1. The purpose of R1 is to complete the D.C. path for the grid bias.

Any hum which may develop is ordinarily trace able to the detector; particular care taken in the selection of a detector tube when first setting up the receiver will result in best operation over an extended period.

Posted October 28, 2016

Radio Service Data Sheets

These schematics, tuning instructions, and other data are reproduced from my collection of vintage radio and electronics magazines. As back in the era, similar schematic and service info was available for purchase from sources such as SAMS Photofacts, but these printings were a no-cost bonus for readers. There are 227 Radio Service Data Sheets as of December 28, 2020.

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Steinite 50-A and 102-A Radio Service Data SheetJanuary 1930 Radio-Craft

Steinite 50-A and 102-A Radio Service Data Sheet

Steinite 50-A and 102-A Radio Service Data Sheet
January 1930 Radio-Craft