Heathkit AA-1214 Assembly And Operation Manual page 40

40
TREBLE
BALANCE
Varies the high frequency response of both channels
simultaneously. Clockwise movement from the center
position produces treble boost, and counterclockwise
movement from the center position produces trebl€
attenuation.
Adjusts the left or right channel amplifiers so there is
equal effective sound from the left and right channel
speake~nterclock wise movement from the
center position , decreases the output from the right
channel amplifier : clockwise movement from the
center position decreases the output from the left
channel amplifier.
BASS
Varies the low frequency response of both channels
simultaneously . Clockwise movement from the center
position produces bass boost, and counterclockwise
movement from the center position produces bass
H E A T H K I T
Th is switch selects AUX input program materia l.
TUNER
This sw itch selects H .. n-er program ma ter ial.
PHONO
This switch selects phono input program material.
This switch selects tape ,npu t program material.
MONO
I n tti e on position , the selected
s1 ;-a1 1 s
applied to
both ch annels . Therefore. the reprodcc t ion 'rom the
riqht and left speaker s,st ems
,•, Ii i
be the same .
In the off posi t ion, ie:t and rigtn channe: s,gnals are
app lied to the correspo nding left and ri<jlt channel
amplifiers.
Figure 1-7
SPKRS
Th is svmch con nects the speaker system to the right
and left channe l amplifiers. Ou tput signals are present
at the PHONE jack regardless of th e position of this
MON
(TAPE MONITOR )
With th is S\Yitch
ir.
the off pos1 t;on , any prog-am
mater ia: being rec orded , is reprod uc ed at me same
t ime by me speaker system. Wim the switch in the on
pos,t,on . the prog<am mater ial is dis.: o nnected from
the ampli fier circuits and
IS
unaffected by the
VOL U';. E control. NOTE The rec0<der mater ial can
be co. _ pled back fr orr the tape recorder (if it has a
, e;::ar2'.e ola yback head } ,nto the Tape ,._.O f, (tape
,...,on 1 ~ X ' jac\c s on the rear of ttie
chas.stS . Tn,s
p,.o·.- :des voi.: with
1n-s ~a-ntaneo<J S
m onitoring of the
tape r ecording .
~
HEATHKIT
~
=tH®iHW-M
VOLUME
sound level of both channels simultane-
ously , Maximum output is obtained in the full
clockwise position.
PHONE
This jack can be used for stereo headphones. Output
signals are present at the jack regardless of the
speaker switch positions.
POWER
In the on posit ion , th is switch applies power to the
in ternal circu its of the Amp 1,f,er, and the SWITCHED
outlet at the rear of the chassis. With the switch in
the off position , power is disconnected from the
SWITCHED outlet and the internal circuits of the
A mpl,f,er. Power is applied to the unswitched outlet
at all times.
,..,