Radio Broadcast (May 1929-Apr 1930)

Record Details:

Title:
Radio Broadcast
Date:
May 1929-Apr 1930
Publisher:
Garden City, N.Y., Doubleday, Page & company [etc.]
Volume:
Radio broadcast ..
Leaf #:
000648
Language:
English
Subjects:
radio periodical, Radio -- Periodicals
Contributor:
Library of Congress, MBRS, Recorded Sound Section
Sponsor:
Library of Congress, Motion Picture, Broadcasting and Recorded Sound Division
Coordinator:
Media History Digital Library
Description:
Radio Broadcast supported home listeners of the new technology of radio – for building or buying a receiving set to explaining the technology used by the new radio stations. Throughout the magazine shows the cultural influence of radio as it evolved from hobbyist to mainstream. -- David Pierce, 2011
Date Added:
September 29, 2022
Something wrong or inaccurate about this page? Let us Know!

Thanks for helping us continually improve the quality of the Lantern search engine for all of our users! We have millions of scanned pages, so user reports are incredibly helpful for us to identify places where we can improve and update the metadata.

Please describe the issue below, and click "Submit" to send your comments to our team! If you'd prefer, you can also send us an email to mhdl@commarts.wisc.edu with your comments.




We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.

Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.

7 RADIO BROADCAST. No. 40 Radio Broadcast'' s Set Data Sheets February, 1930 SPARTON MODEL 301 RECEIVER SELECTOR This receiver uses two 250-type amplifier tubes feeding into an electrodynamic loud speaker. In the filter circuit of the rectifier a tuned circuit consisting of a filter choke coil shunted by an 0.015-mfd. condenser is used. This circuit is tuned to the fundamental frequency of the output of the 280-type rectifier and eliminates practically all of the AMPLIFIER ripple voltage. The field winding of the electrodynamic loud speaker constitutes the second filter choke coil. The schematic drawing shows how the untuned radio-frequency transformers are connected in the receiver circuit but it does not accurately indicate their unusual construction. FADA MODELS 16, 17 AND 32 A three-stage tuned -radio -frequency amplifier is used in this set. It is interesting to note that the input circuits of the r.f. tubes are connected across only part of the tuned circuits. Neutralization is accom plished by connecting the neutralizing condenser from the grid of a tube to the secondary of the following r.f. transformer. The volume control is connected across the antenna-ground circuit. 232 • • FEBRUARY 1930 •