VHF-33
PRO
VHF WIRELESS MIC SYSTEM
EXCELLENT FEATURES:
• Two VHF (very high frequency) Wireless Mic Receivers in One Cool Unit.
• Two Outputs and Two individual Color Coded Output Level Controls.
• Audio Mute Circuitry Provides Noiseless On/Off Switching
• Anti-Roll Grill Ring
• 19" Rack Mount Brackets Included
• Enjoy the Freedom of Wireless Performance in One Small Compact Unit.
Owner’s Manual
WWW.VOCOPRO.COM
8 1
NOTES
The lightning flash with arrowhead symbol, within an equilat-
eral triangle, is intednded to alert the user to the presence of
uninsulated “dangerous voltage” within the product’s
enclosure that may be of sufficient magnitude to constitute
a risk of electric shock to a person.
The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in the
literature accompanying the appliance.
W
ARNING:
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT
EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
C
AUTION:
TO PREVENT ELECTRIC SHOCK, DO NOT USE THIS (POLAR-
IZED) PLUG WITH AN EXTENTION CORD. RECEPTACLE OR
OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERT-
ED TO PREVENT BALDE EXPOSURE.
CAUTION...............................................................................1
NAME OF PARTS AND THEIR FUNCTION (FRONT PANEL)........2
NAME OF PARTS AND THEIR FUNCTION (BACK PANEL)..........3
NAME OF PARTS AND THEIR FUNCTION (MIC)...........................4
OPERATION & TROUBLE SHOOTING.....................................................5
CONNECTIONS.........................................................................................6
SPECIFICATIONS....................................................................................7
NOTES..............................................................................................8
TABLE OF CONTENTS
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF
ELECTRIC SHOCK, DO NOT REMOVE
COVER (OR BACK) NO USER-SERVICE-
ABLE PARTS INDISE REFER SERVICING
TO QUALIFIED SERVICE PERSONNEL
2
7
NAMES OF PARTS AND THEIR FUNCTIONS
VHF-33PRO OPERATION
1.
R
ECEIVER ON/OFF SWITCH
Turns the receiver on or off
2.
C
H 1 Volume Control
This controls the output volume for the Mic on CH 1
N
OTE:
The VHF-33 is designed to use with various audio
equipment, always keep the output level low at first
(Between 1/4 to 1/2 of the dial) to avoid feed back from
your system.
(Min) Indicates the lowest sound output for the CH 1 mic
(Max) Indicates the highest sound output for the CH 1 mic
3.
C
h 1 RF (Radio Frequency) indicator light
Indicates the receiver is receiving signal from the mic on CH 1
N
OTE:
If CH 1 RF indicator is not on when the mic
turns on, check your batterys first (the red battery indicator light
should stay off to show the battery is good), if the CH 1 RF
indicator light still does not go on when you turn the mic, there
may be a strong interference in the area, check the source of
the possible interference and try again.
4.
C
h 1 AF (Audio Frequency) indicator light
Indicates the receiver is receiving audio signal from mic
(headset), The light will only come on when singing or
talking into the mic of CH 1
N
O SOUND
5. Set the output level of the VHF-33PRO at about 1/4, turn on the
power of the receiver, (your mixer),now test your sound system.
N
OTE:
To avoid loud feedback that may damage your system or
cause damage to you hearing. Always set the volume for both the
receiver, body pack, mixer, and amps volume at a lower level first,
between 1/4 to 1/2 of the dial, but do not turn them all the way
down.
6. Turn on the Mic transmitter, you should see the battery indicator
light up about 1/2 of a second and shut off, this shows the battery
is good, if the battery indicator light doesn’t light up at all, or the
light stays on this usually means that your battery is weak and
needs to be changed for a fresh one. Always use new batterys
(Alkaline seems to work the best) to insure optimum perfrormance
from the VHF-33PRO
7. The CH1/CH2 RF (radio frequency) indicator light should be on to
show the receiver is receiving a signal. The CH1/CH2 AF
(audio frequency) indicator light should also come on when you
sing or talk into the mic.
8. Adjust the appropriate volume between your receiver and the
mixer, generally you want to keep your receiver’s level low to
avoid distortion or feedback, talk in to the Mic and turn up the
Mic volume from your mixer until you hear a good balance from
your system.
9.
Enjoy the freedom of wireless performance.
TROUBLE SHOOTING
S
YMPTOM
CAUSE
REMEDY
A.
The Mic or the receiver
unit is not turn on.
B
.
Output level setting is too
low
C
. Input volume of your
system is not turned on.
A
.
Turn both the microphone and the receiver
on, check the signal indicator light to
see if you are receiveing signal.
B
.
Turn up the output level.
C
.
Check the input volume on
your system.
1.
Check all accessories from this list
Receiver x 2
Hand held mic x 2
Ac adapter x 1
9v battery x 2
1/4” jack connection cable x 1
2. Connect the 1/4” jack connector cable from the mixed output
jack of VHF-33PRO to the mic of your mixer.
3. Insert the batteries into the back of the Mic’s transmitter on the
body pack.
N
OTE:
Make sure the “+” positive and the “-” negative are placed
correctly or it may damage the transmitter.
4. Connect the power supply to the back of VHF-33PRO
N
OTE:
Only use the original AC adapter supplied with the unit to
avoid damage to the receiver.
NOISE WHEN THE
MICROPHONE IS OPERATING
A.
Battery is low.
B
.
Antenna is not fully
extended.
C
.
The MIC is out of
range.
D
.
Receiver is interfered by
other device.
A
.
Check the battery power indicator,
change the battery
.
B.
Extend the antennas all the
way up on your VHF machine.
C
.
Check the input volume on
your system.
D
.
Make sure your VHF system is at list 3
feet from any wall, or other radio
signal equipment with a stronger signal
5.
C
h 2 RF (Radio Frequency) indicator light
Indicates the receiver is receiving signal from the mic on CH 2
NOTE:
If CH 2 RF indicator is not on when the mic
turns on, check your battery first (the red battery indicator
light should stay off to show the battery is good), if the CH 2
RF indicator light still does not go on when you turn on the
mic, there may be a strong interference in the area, check the
source of the possible interference and try again.
6.
C
h 2 AF (Audio Frequency) indicator light
Indicates the receiver is receiving audio signal from mic 2
(headset), The light will only come on when singing or
talking into the mic of CH 2
7.
C
H 2 Volume Control
This controls the output volume for the Mic on CH 2
N
OTE:
The VHF-33 is designed to use with various audio
equipment, always keep the output level low at first
(Between 1/4 to 1/2 of the dial) to avoid feed back from
your system.
(Min) Indicates the lowest sound output for the CH 2 mic
(Max) Indicates the highest sound output for the CH 2 mic
8.
R
ECEIVER, ANTENNAS, AND THE
ANTENNAS CLIP HOLDER
Pull out the antennas from the clip holders and extend them
all the way up to get the best reception
N
OTE:
The antennas should never touch each other
when placing the receiver, the antennas should have at least
2-3 feet of clearance from the wall to avoid interferance.
1 2
3
4
8
5
6
7
6 3
CONNECTIONS
NAMES OF PARTS AND THEIR FUNCTIONS
1.
O
UTPUT JACK
Connect this output to the mic input jack of your mixer or
PA system, now you can control the balance of the
microphon’s output by using the volume control of the
VHF-33 receiver.
2.
A
C ADAPTER INPUT
Connect your AC adapter to this port and connect the
other end to the nearest electric outlet (makes sure the
wire from the AC adapter is not steped on, bent, or crushed
by heavy items)
3.
S
OUND TIP:
It’s very important to get the proper volume balance
between the VHF-33 and your mixer. it’s a good idea to set he
receiver’s volume just below half way and then bring up the
volume on the channel thats going into the mixer. If you have
the volume on the reciever set to high it will cause your
mic to distort.
1
2
FIG. 1
FIG. 2
BACK
VHF-33
KJ-8000
MIXED
MIC IN
DJ
MIC IN
MIC OUT
CDG-300
MIC
1 IN
BACK
VHF-33
MIC OUT
4 5
NAMES OF PARTS AND THEIR FUNCTIONS
SPECIFICATIONS
14.
L
ow Battery power indicator light
Once the power switch is on, the battery indicator light will
turn on for about 1/2 of a second to show that the battery is
good, if the light never comes on or stays on, this shows the
battery is low or dead, please exchange for a new battery
15.
P
ower on/off switch
Turns the Mic and the transmitter on or off
16.
B
attery compartment
Turn clock wise to open compartment
17.
9
v battery
Insert 9v battery in to place (make sure that its
correctly placed).
18.
T
op
Once battery is placed insert top back on, turn counter
clock wise to close compartment, battery compartment will
now be safely protected
General Specifications:
• Frequency range: VHF 170 ~ 250 MHZ
• Frequency Stability: + 0.005% Crystal controlled
with temperature stabilizer circuit
• Max Modulation + 15 KHZ
• Frequency Response: 50HZ-18KHZ
• Hum & Noise: Min 100dB
• Distortion: Max 0.5%
M
icrophone Specifications:
• Built-in antenna with noise terminator circuit
• Battery: DC 9V
• Current Consumption: 20mA
• Transmission Power: 30mW
• Spurious Emission: 45 dB below carrier
R
eceiver Specifications:
• Crystal Frequency Receiveing Mode
• Operation Sensitivity: 10dB/uV (S/N 60 dB Min)
• Image & Spurious rejection: min 80dB
• Output; unbalanced 0-.5V
• Power Supply: DC 12-15V
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