SYSTEM GROUNDING
O P E R A T I O N :
In any sound system it is necessary for the audio
common to be connected to the equipment chassis some-
where in the system. On the SAX100 the NEGATIVE
side of the power supply is also the audio common.
Further, it is recommended that for best results ONLY
ONE such connection be made in the entire system. It is
not always possible to predict the best location for this
connection, however, through experience Rauland has
found that generally the best place for this connection is
on the PRE-AMPLIFIER chassis. All Rauland pre-
amplifiers are supplied with this chassis connection. If
the amplifier is to be used without a Rauland pre-ampli-
fier, some other chassis to negative connection MUST
BE PROVIDED.
As shipped, THE
SAX100 HAS NO
CONNECTION FROM
CHASSIS TO POWER SUPPLY
NEGATIVE.
A U X I L I A R Y D . C . P O W E R O U T L E T
The SAX100 is able to furnish D.C. power for the
operation of relays and pre-ampl if iers.
The power available is shown below and in Fig. No.
3. Pin assembly is shown in Fig. No. 2.
VOLTAGES
AVAILABLE
28 Volts Pos
(not-switched)
Negative Common
PIN
CONNECTIONS
No. 7
No. 3
No. 1
MAXIMUM
CURRENT
0.5 Amp.
loo MA.
MALE CABLE CONNECTOR
RAULAND PART NO. SN-0263-A
KE
POSITIVE
28V 0.1 AMP.
UNSWITCHED
Y (FEMALE)
0
POSITIVE 28V
½ AMP. SWITCHED
FIG. NO. 3
NOTE: Pins No. 1, 3, 4, and 7 are male pins. Pin No.5,
the key pin, is female and must be in place to prevent
accidental connection to the AUDIO OUTPUT SOCKET.
When plugged into the power line, only the power
transformer of the SAX100 remains energized. This pro-
vides a voltage for the control relay. The control relay
is actuated by completing the circuit between wires from
pins #1 (Negative Common) and #4 of the D.C. output and
control plug. This turns on the amplifier, D.C. supply,
and A.C. receptacles. Once on, the output level of the
amplifier may be adjusted with the input level control.
Protective Devices:
Line Fuse:
The amplifier has a 3 ampere line fuse.
This is located inside the front chassis of the ampli-
fier in the upper left hand corner. Replace only with
a 3 amp 3 AG SLO-BLO fuse.
Thermal Overload Relay:
If the temperature of the
amplifier rises to an unsafe level, the thermal over-
load relay located on one of the output stage heat
sinks will turn off the primary power. When the ampli-
fier cools to a safe operating level once more, the
thermal overload relay will automatically reset.
A second thermal overload relay protects the ½
Amp. D.C. output circuit. If an overload should occur
the thermal overload relay will open the circuit for
several seconds and then automatically reset. This
cycle will continue until the overload is removed.
HEAT
SINK
WITH
SOCKET
ATTACHED
MICA WASHER
COAT MICA WASHER ON BOTH SIDES
WITH DOW CORNING DC-4
SILICON
GREASEOREQUIVALENT.
TO-3CASE
TRANSISTOR
MOUNTINGSCREWS
#6x¼"SHEET METAL SCREWS
FIG. NO. 4
(Continued)
Summary of Contents for SAX100
Page 5: ......
