Nady Systems WA-125U Owner's manual - page 7
same frequencies that can possibly affect the sound even while the mic transitter is on and being
used). In normal operation, the RF MUTE (Squelch) TRIMPOT (18) should be set clockwise fully
to the factory setting (Max. range). However, in areas of high RF activity, the RF MUTE (Squelch)
TRIMPOT (18) may need to be readjusted to compensate for the adverse conditions in a particular
location. Turning the RF MUTE (Squelch) TRIMPOT (18) too far counterclockwise will reduce the
range, but yield a quieter squelch audio mute function. Note that when the RF LED (5) extinguishes
during operation, the transmitter is out of range for that given location, and the user should move
closer to the receiver to re-establish the radio link.
Attention:
1. If feedback (howling sound) occurs, try first turning down the TREBLE CONTROL (6). If
feedback still is present, try turning down the VOLUME (5) or repositioning the WA-125U
with respect to the wired or wireless mic being used.
2. Keep line of sight between WA-125U receiver and wireless transmitter whenever possible
to ensure optimum performance and maximum range.
Stereo/Mono Wiring Illustration (for use with AUX input and
RECORD output)
For stereo to mono conversion of the signals to the AUX input and mono to stereo connections from
the RECORD output, wire the connecting cord as per the following illustration:
WA-125U Battery Charging Operation
The WA-125U has two ports in the rear compartment for charging a single 9V BATTERY (11) and
the optional RB-120 (12-15V) DC rechargeable battery. This battery charger can be used when-
ever the WA-125U is operated from AC power. If you are using rechargeable batteries in your
transmitter, you can replace them as necessary with freshly charged ones, even during use. The
discharged battery can immediately be put on charge. The charging LED INDICATORS (10) for
9V and (19) for 12V will light RED whenever a battery is taking a charge. When the battery is fully
charged, the indicator will turn GREEN.
Attention: This BATTERY CHARGER (11) can only be used for one 9V Ni-Cad or Ni-MH and
(16) for one 12V rechargeable at the same time. Never use them for any other type of battery
under any circumstance as this can result in damage to your unit and even danger from
exploding batteries.
PO
WE
R
RF O
N
MIC
/TX
MIC
ECH
O
MIC
AUX
AUX
REC
OU
T
TRE
BLE
BAS
S
ON
WIRELESS
AMPLIFIE
R
POW
ER
RF ON
MIC/TS
MIC
ECHO
MIC
AUX
AUX
RECOUT
TREBL
E
BASS
ON
WIRELESS A
MPLIFIER
POWER AMPLIFIER
PORTABLE RECORDER
PORTABLE CASSETTE
RECORDER
PORTABLE CD PLAYER
7
WA-125U OPERATING INSTRUCTIONS
10
To cassette recorder
3.5 mm
6.3 mm
To Rec out (8) or Aux (2)
Stand Mounting the WA-125U
The WA-125U can be mounted on the optional MST-4B aluminum tripod stand for convenient
placement in a higher position. Contact your dealer or the Nady service department. (See Page12)
Transmitters set up
The UB-4 transmitter requires a single 9V battery to operate. To open the battery compartment,
snap open the BATTERY DOOR COVER (26), exposing the BATTERY HOLDER (27). Insert a
fresh 9V battery according to the correct polarity as indicated on the transmitter body. Snap the
cover back onto the bodypack. Make sure the cover is secured completely. Fresh alkaline batteries
can last up to 10 hour of operation, but in order to ensure optimum performance, it is recommended
that the batteries should be replaced after 6-8 hours of use.
Input Connection and Input Selector Switches
The UB-4 is provided with a 3.5MM LOCKING JACK (29) for connecting the audio input selected.
Connect either the INSTRUMENT CORD (34), or the HEADWORN MIC (35), or LAVALIER MIC
(36) as desired, according to the input selected.
(Note: Use only the input audio source as per the input selected with the input audio Input Selector
Switch or the audio will not be optimal — a muddy or distorted sound may result.)
To secure the connection, turn the slip ring on the plug clockwise ti thread it on the jack. To unplug,
reverse the process. Slip the transmitter into a pocket or clip it onto you cloth or instrument strap (if
using the UB-4 as an instrument transmitter.)
The UB-4 is equipped with two INPUT SELECTOR SWITCHES (28) located under the
cover on the circuit board for selecting the type of audio input you will be supplying
to the transmitter. Select from the choice of three positions: INSTRUMENT (for guitar,
bass, etc.)/ HEADWORN MIC/ LAVALIER MIC. (G/H/L).
There are two switches, one with selectable position G, H, L and the other with G, HL.
To select inputs: (see chart on page 12)
A. Instrument — both switches to “G”
B. Headworn Mic — set one switch to “H” and the other to “H”
C. Lavalier Mic — set one switch to “L” and the other to “L”
Microphone Operation
To turn it on, slide the OFF/STANDBY/ON SWITCH (33) to the STANDBY position first (transmitter
on, audio muted) or the ON position (transmitter and audio both on). The POWER LED (30) will
stay on green and the LOW BAT indicator LED (bottom) will give a single flash in red, indicating
usable battery strength. In case of dead or low battery, both LEDs will either not go on at all or will
stay on continuously. During use, the LOW BAT will give a red flashing warning until it stays on
continuously, indicating that the battery should be replaced with a fresh one. To preserve battery
life, turn the transmitter off when not in use. To turn off, slide the OFF/STANDBY/ON SWITCH (33)
to OFF position. No LEDs will light up. The unit is now off.
Level Trim Adjust
For optimum performance, an INPUT LEVEL CONTROL (32) for LT/HM is provided. Adjust the
microphone gain by inserting a small slot-headed screwdriver to the adjustment knob, located on
the topside of the transmitter unit, next to the mic input jack. Factory setting is 1⁄2 full. This is a set-
ting to be used in most typical close microphone applications. Depending on the average distance
between vocalist’s mouth and microphone, you can adjust the level for your application. Set for
maximum possible gain and headroom without noticeable distortion of the high level peaks. It is
recommended that the level be set at about 1⁄2 maximum. Experiment and set for maximum pos-
sible gain without audible distortion on the high level peaks. on, indicating a received signal from
the transmitter. When ready to speak, slide the switch to the ON position. Adjust the volume of the
receiver as per in the receiver operating instruction section.
UB-4 BODYPACK MICROPHONE TRANSMITTER