Western electric 247 a brochure
This is the 4 pages manual for western electric 247 a brochure.
Read or download the pdf for free.
If you want to contribute, please mail your pdfs to info@audioservicemanuals.com.
Extracted text from western electric 247 a brochure (Ocr-read)
Page 1
BELL SYSTEM PRACTICES K SECTION AB46.247A
TRANSMISSION ENGINEERING AND DATA ISSUE I, APRIL 1948
ELECTRON TUBE DATA A.T.&T. CO. STANDARD
TRIODE ,
AUDIO-FREQUENCY AMPLIFIER Wfifefli £166 10
DESCRIPTION
. The 247A is a low power triode having an indirectly heated cathode. It is designed for
use in audio-frequency amplifier, oscillator, and detector circuits.
CHARACTERISTICS
Heater Voltage , , , , . . . I . I . . . . 2.0 volts
Maximum Plate Voltage , . . . . . . . . . . 180 volts
. Amplification Factor . l l l . . 15
ELECTRON TUBE DATA SHEET
FIL4E: GENERAL PURPOSE SECTION
11- 7