Service Manuals, User Guides, Schematic Diagrams or docs for : Agilent journals 1962-01
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HEWLETT-PACKARD
W ~ ~ f ~ ^ T E C H N I C A L I N F
JOURNAL
O R M A T I O N F R O M T H E - h p - L A B O R A T O R I E S
Vol. i:
PUBLISHED BY THE HEWLETT-PACKARD COMPANY, 1501 PAGE MILL ROAD, PALO ALTO, CALIFORNIA JANUARY, 1962
The Transistorized RC Oscillator
'"'he illustration below shows the well- instrument has been designed in a battery op
J- known RC test oscillator in a transistorized erated version so that line-voltage effects are
version which has been designed to provide a avoided completely as is hum, although in the
test oscillator of very high portability. Physi ac-operated version these factors have been
cally, the new oscillator is small enough and kept very small, too. In addition, since the cir
light enough to be held easily in one hand. cuit is fully transistorized, the new oscillator
Electrically, it operates over the frequency is virtually insensitive to vibration and shock,
SEE ALSO
range from 5 cps to making it a very stable and rugged precision
"New high-power 500 kc in 5 ranges. instrument indeed.
TWT amplifiers," p. 4
It provides up to 2.5 TRANSISTORIZED
volts across loads of 600 ohms or more and is CIRCUITRY
in every sense a quality oscillator, having less From a design viewpoint the transistoriza
than 1% distortion, better than 3% frequency tion of the RC oscillator is interesting because
accuracy, a constant output with frequency, it has resulted in several variations over pre
and outstanding frequency stability. Even vious designs. The basic arrangement of the
warm-up drift is in general negligible. Also the new circuit is shown in Fig. 3. The frequency-
t_j
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