Note
QST, Jul 1938, p. 1.
Lafayette catalog number 73, p. 108.
Lafayette catalog number 78, p. 148.
The S-21 was also known as the Skyrider 5-10, operating on what then were known as Ultra High Frequencies. One of its eight tubes was the newly developed RK 1851 RF amplifier. The receiver tuned from 27 to 68 MHz.
Options include XP4 six volt "vibrapack” for mobile operation, and external S-meter (SM-21).
Coverage: 27 MHz to 68 MHz
IF: 1600 kHz
Built-in Speaker
No bandspread
BFO
ANL
Switchable IF selectivity (broad or sharp)
Power: 120 VAC, 6 VDC (with optional XP4)
Tubes: (1) 80, (1) 6F6, (1) 6Q7, (1) 6P7, (1) 6K7, (1) 6J5, (1) 6L7, (1) 1852
References
Review. Radio News, Jan 1939, p. 38.
Brief review: Radio, Mar 1939, p. 72.
Key words
Five Ten