RF Cafe Software
About RF Cafe
1996 - 2022
BSEE - KB3UON
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 Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...
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March 1936 Radio-Craft[Table of Contents]
People old and young enjoy waxing nostalgic about and learning some of the history of early electronics. Radio-Craft was published from 1929 through 1953. All copyrights are hereby acknowledged. See all articles from Radio-Craft.
This is another Radio Service Data Sheet that appeared in the March 1936 edition of Radio-Craft magazine. I post this schematic and functional description of the Crosley Model 515 (Fiver) 5-Tube 2-Band Superhet radio manufacturers' publications for the benefit of hobbyists and archivists who might be searching for such information either in a effort to restore a radio to working condition, or to collect archival information.
(Tone control; ranges, 540-1,570 kc., 1,570-4,000 kc.: airplane dial; 685 output tube; dynamic speaker)
When aligning the I.F. amplifier of this set, keep the service oscillator lead well away from the tubes. It is attached to the cap of V1. Tuning condenser must be at lowest capacity. Volume control, total 8,000 ohms, 200 ohms fixed.
The voltages for this set are as follows:
Tube V5 has 4.9 V. on the filament; the others, 6.3 V. Total power consumption is 50 W. The R.F. circuits are aligned at 1,570 for the oscillator and 1,400 for the ant. section. The police band does not need aligning.
Posted July 13, 2015
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 185 Radio Service Data Sheets as of April 12, 2017.