Table of Contents
Advertisement
INSTALLATION
MOUNTING
",,/\
"-""' : -,>:ie amplifier has been provided with two
keyhole slots for #8 screws for fixed or
permanent mounting.
INPUT CONNECTIONS
Provisions aI'e made for changing from
600 ohm matching to 6,000 ohm bridging
on the input terminal strip.
Fig. 1
shows the connection for 600 ohms.
Fig" 2 shows the connection for 6,000
ohm bridging.
In the event that a
prea~plifier
driver
is used requiring a minimum load of
10,000
ohms~
a 2200 ohm resistor may be
added at each bridging input termina.l.
With this change, 1.5 volts input wil]
be required for full output.
2
3
4
5
Fic;. 1
l
3
4
5
Il!
n
UMP
0
6000A
Fig. 2
OUTPUT CONNECTIONS
6
7
6
7
Output connections are made to the two
lug terminal strip on the end plate of
the chassis.
Groups of speakr:rs ma;y be
driven with this amplifier; connected in
series, parallel, or series parallel;
but thp
combined impedance should rlot be
less than
4
ohms.
Wittl an impedance of
more th:}n
12
ohms, the amplifier will
not be able to deliver full outlut power.
Speaker matcilins
tran,3formf~r'S
permit the
paralleling of a number of sp';:;ak9Is, de-
pen1ins on the unit required.
Gates
Part No. 4780291000 tIansio[m"x is
fvailable\ havinG a
pr~mary
of 48 ohms
, .:i:1.d a secondary
of
8 ohms f
or
matching
purposes.
·-2-
In wiring speaker loads it should be re-
membered that 8 watts at 8 ohms repre-
sents
1
ampere of audio current.
The
recommended lise of No. 16 gauge twisted
and shielded wire will prevent power
losses and possible interaction of
CiI'-
cuits.
AMPLIFIER PARALLELING
It
is not recommended
that amplifiers of
this type be paralleled at their outputs
to obtain higher' power'.
Where more pow-
er is required than can be supplied
by
one amplifier, the speaker load should
be divided between several amplifiers
which have their inputs br'idged across
the common signal source.
POWER CONNECTIONS
117
volts A.C., 50/60 cycles is supplied
thru the power COLd and power plug on the
chassis end plate.
A
pO-i'Jer switch is not
required due to the low power
consumptio~
and heat dissipation.
NOTE
While the amplifier can handle a contin-
uous
8
watts of proGram material,
CAUTION
should be exercised d\lrintj i'ull power
sine wave testinG to avoid exceeding the
thermal capabilities of the chassis heat
sink.
MG108 MONITOR AMPLIFIER
Advertisement
Table of Contents
