Raymer 810-100 User manual

RAYMER
OPERATING INSTRUCTIONS
©
WARNING - TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS AMPLIFIER TO RAIN OR MOISTURE
DESCRIPTION
UNPACKING
The Raymer Model 810-100 is a multi-purpose 100 Watt
RMS. monaural, all silicon solid state amplifier. It is designed
for dependable continuous operation in background music,
public address, paging, and sound reinforcement systems.
Provision has been made for a choice of two microphone
inputs and one music input; or for one microphone, one
auxiliary and one music input. All inputs are unbalanced.
Mic-1 which comes wired for high impedance may be con¬
verted to a balanced low impedance microphone input by
the use of a RAYMER plug in transformer Model MT-3 or
to a 500/600 ohm balanced telephone line input by means
of RAYMER plug in transformer Model TT-4.
Mic-2 may be switched for either Hi-Z or Lo-Z micro¬
phone. Provision has also been made fora choice of one of
two separate sources to be connected to the Music input.
The Music or Aux inputs are high impedance and are for use
with a tuner, a high output ceramic or crystal phono, a tape
recorder with its own preamp, or other auxiliary equipment
The amplifier also features an electronic Music Mute
(Precedence) circuit in place of a relay to quickly fade out
the music while paging; after the page, the music is smoothly
restored. The music fade feature operates only on the music
inputs.
Model 810-100 is provided with a switch to protect
trumpet speaker diaphragm(s) from damage when used on
low frequency signals. The amplifier has a master gain con¬
trol, as well as separate bass and treble controls, which may
be used to compensate for room and speaker characteristics.
The amplifier has provision for 4 and 8 ohm unbalanced
speaker terminals as well as 25 volt and 70 volt balanced or
unbalanced lines.
A unique feature of the amplifier is a red LED overload
indicator, which when lit provides a visual warning that the
amplifier is operating improperly. This may be caused by a
mismatched condition, overload, or oscillation which over¬
drives the output transistors beyond safe operating limits
and could cause component damage.
Model 810-100 has IN and OUT jacks for connecting
an equalizer or similar equipment, also for connecting two
or more 810-100 amplifiers so that they may be operated
simultaneously to deliver a total power in multiples of 100
watts into a speaker line.
The unit is to be removed carefully from the carton and
inspected for any possible damage in transit. If there.is any
evidence of any damage which might have occurred in ship¬
ment, immediately notify your supplier, or the transporta¬
tion company which delivered it. Claims for damage sus¬
tained in transit must be made upon the carrier. Save all
packing material for inspection by the claim agent who will
furnish you with the proper forms and will also give you
the necessary instructions for filing a claim.
In addition to the unit the carton should contain a
warranty registration card. To insure proper servicing and
to protect your rights under the warranty, be sure to fill in
the warranty registration card and mail to the factory
within 10 days.
INSTALLATION
Model 810-100 amplifier has ample vents for normal
ventilation; however, it should be placed so as to permit
free air flow around the unit. DO NOT PLACE ANY
OBJECT ON TOP OF THE COVER OR IN ANY WAY
BLOCK THE AIR FLOW OF THE VENTS. DO NOT
STORE OR OPERATE THE AMPLIFIER in areas where
the ambient temperature exceeds 140°F.
The amplifier may be mounted in a 3%" vertical panel
space in a rack, using a Raymer RPK-5 rack mounting kit.
Should multiple units be stacked, or heat generating units
be installed immediately above or below the amplifier(s),
then at least a 2" spacing must be provided between these
units for adequate ventilation.
The amplifier has an AC line cord with a 3 prong plug.
The line cord should be plugged into a 3 wire grounded
105 to 120 volt 60Hz AC outlet. This will also ground
the amplifier.
The power switch will turn on the amplifier as well as
any auxiliary equipment connected to the AC receptacle
on the rear panel, and the green LED indicator lamp on
the front panel will light.
The AC receptacle on the rear panel is a 3 wire grounded
outlet which can supply power to accessory or auxiliary
equipment. Any auxiliary equipment connected to this AC
receptacle is controlled by the POWER on-off switch so
that turning off the power on the unit turns off all
equipment.
- 1 - .

r
Figure 1. Rear Panel of Amplifier
CONNECTIONS
All connections are made on the rear panel as shown
in Figure 1.
THE REMOVAL OF THE COVER AND JUMPER
WIRES FOR THE INSERTION OF EITHER TRANS¬
FORMER MUST BE DONE BY A QUALIFIED TECHNI¬
CIAN. BE SURE THE POWER CORD IS DISCON¬
NECTED BEFORE REMOVING THE COVER.
INPUT CONNECTIONS AND CONTROLS
All patch cords and input leads other than Music Mute
must be shielded cables. The Music Mute leads do not
have to be shielded. When output leads are run near an
unshielded microphone input plug, or when run together
with the microphone precedence leads, a supersonic oscilla¬
tion may occur. When this does occur, it will appear as a
distortion in the amplifier output, and oftentimes will
cause the circuit breaker to “trip".
To prevent this oscillation from occurring, it is recom¬
mended that shielded microphone plugs be used wherever
possible. In the event that an unshielded plug or a molded
cable assembly is used, keep the output leads away from
the Microphone input(s) and Microphone precedence leads.
In order to make the connection to MIC-1 use a
Cannon XLR-311C or equivalent connector wired as shown
in Figure 2.
FIGURE 2.‘ MICROPHONE 1 INPUT CONNECTIONS.
MIC-1 is wired for an unbalanced high impedance micro¬
phone. For a low impedance balanced microphone input
remove the cover of the amplifier as well as the jumpers in
the socket inside the amplifier, and insert a Raymer
Model MT-3 microphone transformer in the socket.
When the paging source is from telephone lines, the
Raymer Model TT-4 telephone input transformer is to be
inserted in the socket. Typical input wiring from telephone
lines is shown in Figure 3. The two pair of lines furnished
by the telephone company are identified as RING AND
TIP (voice transmission pair) and CONTACT CLOSURE
(normally open relay contacts). When it is not necessary
to mute the music during page or the music channel of the
amplifier is not used, the CONTACT CLOSURE pair is not
required.
Interconnection to a private telephone system is shown
in Figure 4.
FIGURE4'. PRIVATE a HONE SYSTEM ,NPUT CONNECTIONS
WHEN USING TT-4 input TRANSFORMER.
The slide switch directly below the MIC-2/AUX on the
front panel will permit the use of either a microphone
(Hi-Z or Lo-Z) or any auxiliary high impedance input.
When this switch is in the AUX position the auxiliary
source is not controlled by the electronic fading (muting)
circuit. The microphone input jack is for unbalanced lines
only. If it is necessary to use a balanced microphone input,
use Raymer Model LMT-150 microphone matching trans¬
former. The switch alongside the MIC-2 input jack selects
the proper input impedance. The Hi-Z position will match
either crystal or high impedance dynamic microphones; the
Lo-Z position will match microphones in the 150 to
500 ohm range.
The music channel has two input jacks (MUSIC 1-2) for
selection of the desired signal source. This selection is con¬
trolled by a slide switch directly below the MUSIC control
and is marked "1-2" on the front panel. Either input is
for a high impedance source such as a tuner, a high output
ceramic or crystal phono, a tape recorder with its own
preamp, or other auxiliary equipment of a similar nature.
If the signal source is a telephone line or a 500 ohm input,
the connection can be made to the amplifier by means of a
Raymer Telephone Matching Adaptor Model TM-2.
If it is desirable to fade out the music while paging, a
"dispatcher" type of microphone with an auxiliary switch
having a pair of normally open contacts should be used.
The microphone is to be connected as shown in Figure 5.
FIGURE SI TELEPHONE INPUT CONNECTIONS WHEN
USINC TT-4 INPUT TRANSFORMER.
FIGURE5: VC-2 CONNECT ON *0RA SINGLE MICRCPHO>IE.FOR MORE
THAN ONE MICK=H0N£,CONNECTCCIITROLCiaC JITS IN PARALLEL.
A
J

Individual volume controls are used to adjust the level
of the MIC, MUSIC, or AUX input channels. The MASTER
control will regulate the gain of all inputs simultaneously.
The BASS and TREBLE controls should be set to com¬
pensate for room and speaker characteristics or for undesir¬
able effects of acoustic feedback. When both controls are
in the center position they will provide a flat response.
Turning the Bass control to the left reduces the bass
response. Turning the Treble control to the left reduces
the high frequency response of the amplifier.
Where a system either has acoustic feedback or is on the
verge of feedback, the undesirable effects may sometimes
be reduced by adjustments of both the Bass and Treble
controls.
In order to protect horn loaded drivers, the TRUMPET
PROTECT switch on the rear panel should be placed in the
"Trumpet Protect" position. This reduces the bass frequen¬
cies and protects the driver diaphragms from possible
damage. For use with cone type loud speakers, the switch
should be placed in the "Normal" position.
The output terminals of the 810-100 have been phased
at the factory so that each termTnal is in phase with the
corresponding terminal of any other Raymer 810-100
amplifier. For connecting the amplifier in either parallel or
series, the terminals should be wired as shown in Figure 7.
FIGURE 7:0UTPUT CONNECTIONS EQR SERIES OR PARALLEL OPERATION.
PREAMP OUTPUT, AMPLIFIER INPUT - These
jacks may be used for either input or output applications.
They are connected electrically between the preamplifier
and power amplifier sections of Model 810-100, and may
therefore be used (1) as the output of the preamplifiers into
an external amplifier and/or tape recorder, or (2) from the
output of an external source into the power amplifier sec¬
tion. When the Preamp Output jack is used to feed an
external amplifier or tape recorder, the bridging circuit is
affected by the Master Volume, Bass, and Treble controls.
When the Amplifier Input jack is used as the input from an
external source (such as a microphone mixer-preamplifier
when additional microphones are required) the reproduc¬
tion from the external source will not be affected by the
Bass and Treble controls.
By interconnecting or bridging the PREAMP OUTPUT
or the AMPLIFIER INPUT jack of two or more
Raymer 810-100 amplifiers with a patchcord, they may be
operated simultaneously to deliver a total output in multi¬
ples of 100 watts into one speaker line, or separate speaker
lines if desired. See Figure 6.
In the event it is desired to connect an equalizer or
similar equipment to a single 810-100 amplifier, the PRE¬
AMP OUTPUT and AMPLIFIER INPUT jacks are to be
used. In order to use the additional equipment, it will be
necessary to remove the jumper wire between the jacks
which is located internally. When this external equipment
is to be used with amplifiers paralleled for increased power
to the speaker lines, the interior jumper wire shorting the
jacks in each amplifier must be removed. The PREAMP
OUTPUT jacks of all the amplifiers are connected together
with a patchcord and the AMPLIFIER INPUT jacks are
also connected together in a similar manner as shown in
Figure 8. Note — All internal jumper wires must be removed
by a qualified service technician.
'NPUT > PREAMP _ '_ PRFAM
ACCESSORY
1EQUIPMENT I
PREAMP
OUTPUT
AMPLIFIER
INPUT
PREAMP
OUTPUT
REQUIRED
FOR
opewItion amplifier
UHtKAIIUN 1NPUT
uuirgi _ _ i v ru i_ . __ IINPU
•0 C D—<v“0 .•«>-£>- Cp@
HGURE 8:OPERATION WITH ACCESSORY EQUIPMENT RtQUIRES
REMOVAL OF INTERNAL JUMPER IN AMPLIFIER.
FlGUREo'.ElTHER JACK MAY tE USED TO PARALLEL 8I0-'0L AMPL ! F lERS,
ONLY IF IN~ERNAL JUMPER HAS NOT BEEN REMOVED.
CAUTION: BEFORE OPERATING AMPLIFIERS CON¬
NECTED EITHER IN SERIES OR PARALLEL, MAKE
CERTAIN THAT THE TRUMPET PROTECT SWITCHES
ARE IN THE SAME POSITION ON ALL AMPLIFIERS.
WHEN CONNECTING THE OUTPUTS IN SERIES, MAKE
CERTAIN THAT THERE IS NO JUMPER CONNECTION
BETWEEN COM AND GND ON THE SCREW TERMINAL
BOARD.
The red LED "Overload" indicator on the front panel
monitors the output transistors and when it is illuminated
continuously it is a warning that the amplifier is being
operated improperly. This condition could be caused by
mismatch of output load, incorrect output impedance, short
circuit in the output, or that the amplifier is oscillating
(which could be caused by improper shielding or position of
input leads) and may result in the circuit breaker tripping.
To correct and localize the problem, first turn each input
control to "0". If the LED is still illuminated, then reduce
the Master control to "0". If the LED light goes out, then
the trouble is more than likely in the external equipment
plugged into the PREAMP OUTPUT/AMPLIFIER INPUT
jacks. If the light does not go out, have the amplifier
serviced by a qualified service technician or return the unit
to the factory.
Occasional flickering of the LED means that the ampli¬
fier is being driven to the maximum on peaks of the pro¬
gram material, which is not harmful nor will in any way
damage the amplifier.
- 3 -

OUTPUT CONNECTIONS
The speaker(s) or line matching transformers are con¬
nected to the screw terminal board located on the rear
panel. For short distances any ordinary insulated wire, such
as parallel lamp cord, may be used.
Long lines have an appreciable resistance with resultant
power loss. The use of parallel matching transformers on
either 25 volt or 70 volt lines is recommended for long
distances. In all cases, it is advisable to run as heavy a wire
as possible consistent with the requirements. To avoid
inducing hum in the system, do not parallel speaker cables
with any AC line power cables.
70 volt distribution systems often require the speaker
lines to be run in conduit. To determine whether they
should be run in conduit check with local city codes for
70 volt system requirements.
The 4 OHM or 8 OHM output is used when con¬
necting directly to the speaker voice coils. When a
speaker with an impedance of 8 ohms is connected to the
amplifier, use the terminals on the amplifier marked GND
and 8S2. For a 4 ohm speaker or two 8 ohm speakers in
parallel, use GND and 4f2.
The 25 VOLT or 70 VOLT output is used when con¬
necting to speakers which have line matching transformers.
Connecting to the 25 volt or 70 volt tap on the unit permits
the use of a number of speakers each with its own corre¬
sponding line matching transformer, thereby eliminating
the necessity of calculating impedances. The tap on the
line matching transformer is selected to give the power
desired for each speaker. The total of all the power settings
should be no greater than the amplifier output rating. If
the speaker uses a 25 or 70 volt line transformer, connect
the speaker transformer to the terminals marked COM and
25V (or 70V) according to the line desired. For an
unbalanced line connect a jumper between COM and GND;
if a balanced output line is used, no jumper is required.
The power transistors are mounted on the heat sink. In
the event it becomes necessary to replace these transistors,
be certain that:
1. No grit or metal particles are lodged between the
transistor and the mica or heat sink.
2. The mica insulator is not damaged.
3. Both sides of the mica insulator are covered with
Dow Corning 7 Silicone Grease or equivalent.
4. The mounting screws are tight, and also that the
protective cover does not touch the transistor.
Optimum performance of any transistor amplifier de¬
pends on the proper current delivered at the output
terminals. Connecting a total load impedance at any tap
less than the impedance indicated on the back panel of the
amplifier will cause the transistors to deliver more current
than they were designed for and will deteriorate the per¬
formance of the unit and cause damage to the'transistors.
To prevent this from occurring and to protect the compo¬
nents, the unit is equipped with a circuit breaker that will
trip if the output impedance is below the specified rated
value; for example, if two 8 ohm speakers are connected in
parallel (resulting in a 4 ohm impedance), and in turn con¬
nected to the 8 ohm output terminal, the circuit breaker
will trip as soon as the volume control is turned up to the
unit's maximum output.
The circuit breaker located on the rear panel protects
the uoit from drawing excessive AC line current which
could cause damage to the internal components. If the
circuit breaker opens, the green LED indicator will go out
and the amplifier will have no AC applied to it, but there
will continue to be power at the auxiliary power receptacle
located at the rear panel. Set the AC power switch to OFF
and momentarily depress the red button on the circuit
breaker to reset it, and slide the AC power switch to ON.
Observe the red "Overload" indicator. If it lights, this
indicates that the reason that the circuit breaker is tripping
is due to a short circuit, or a mismatch of the output, or
an oscillation caused by improper shielding or coupling of
the input leads. If the overload light does not come on but
the circuit breaker continues to trip, then this indicates a
failure of an internal component.
IN THE EVENT THAT THE CIRCUIT BREAKER
CONTINUES TO TRIP, DO NOT ATTEMPT TO DEFEAT
THE FUNCTION OF THE CIRCUIT BREAKER. HAVE
THE TROUBLE INVESTIGATED BY A QUALIFIED
SERVICE TECHNICIAN OR RETURN THE UNIT TO
THE FACTORY.
WARRANTY
This unit has been very carefully inspected and is warranted to be free from defects in material and workmanship under
normal use and service for a period of one year from date of sale to the original purchaser. This Warranty does not
extend to any unit which has been subject to abuse, misuse, neglect, accident, improper installation, or alterations. The
obligation of Trutone Electronics under this Warranty is limited to the repair of any defect in material or workmanship
and/or the replacement of any defective part, provided the unit is returned to Trutone Electronics Inc. transportation
paid within the year.
It is recommended that any unit on which service is required be processed through your distributor or installation com¬
pany wherever possible.
In order for the above Warranty to be in effect the Warranty Registration Card enclosed with the unit must be filled
our completely and mailed within ten days of purchase.
This Warranty is expressly in lieu of all other Warranties, expressed or implied, and of all other obligations or liabilities
on our part. We neither assume nor authorize any other person to assume for us any other liability in connection with
the products manufactured by Trutone Electronics, Inc.
Made in U.S.A. by
TRUTONE El FOTRONIOS I NT
me r..u.. *