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HP Barney Oliver Manual page 15

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The Barney Oliver Audio Amplifier
Resistors R17 and R19 as well
R20 are dividers to develop the
The
10V
_-I:
followers Q7 and
CR15 and CRI6 provide short circuit pro­
tection and transistors Q9 and QI0
emitters
of
and Q8
from shorts betw een the 10 and 20 volt
R1B and
as
± lOY
reference.
are
taken
from
emitter
reverse voltage
The 10 and 20 volt
essentially ripple free.
The maximum
various
±
the
±20V
40V
±50V
Circuit Description
ar e
and
of the
l8 ma
70 ma
3 amps
0.5 amps
5-3

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