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2i
Frequency Set Designation: The label inside the battery com-
partment also indicates the designation of the Frequency Set.
2j
Adjustable protective ring: Protects the controls from being
misadjusted accidentally.
5.2. Interchangeable Microphone Elements
The interchangeable microphone elements (2k) D 880 WL1,
D 3700 WL1, D 3800 WL1, C 5900 WL1, and C 535 WL1
are acoustically and mechanically identical to the equivalent
hardwire versions. They feature the same transducer capsules and
mechanical construction.
Extremely high gain before feedback, optimum handling noise
rejection, ultimate protection from damage, and an integrated
wind and pop screen are only the most impressive features of
these microphones. For more details, refer to the respective AKG
brochures.
5.3. Optional Accessories
W 880 foam windscreen for D 880 WL1
W 3001 foam windscreen for D 3700 WL1 and
C 5900 WL1
W 23 foam windscreen for C 535 WL1
Color Coding Kit
6. Bodypack Transmitter
You can use the PT 61 bodypack transmitter with both dynamic
microphones and condenser microphones operating on a supply
voltage of approx. 7 V. You may also connect an electric guitar,
electric bass, or remote keyboard.
The PT 61 operates in a subband up to 4 MHz wide of the
138 MHz to 250 MHz VHF carrier frequency range. The HT 61
can be switched to a maximum of 15 different carrier frequencies
depending on local frequency allocations.
The PT 81 is identical to the PT 61 except that it operates in the
710 MHz to 869 MHz UHF range
6.1. Controls
3a POWER: Switches the transmitter power ON ("I") and OFF
("0").
3b MIC: Mutes the audio signal (position "0") while power and
carrier frequency remain ON.
3c Status LED: Indicates battery status and audio input overload.
LED glowing dimly: batteries are OK.
LED constantly lighting brightly: batteries will be dead in
about 60 minutes.
LED illuminating brightly: audio input is overloaded.
3d Audio Input: 3-pin mini XLR connector with both mic and line
level pins that automatically match the connector pinout of the
microphone or optional MKG/L guitar cable.
3e Color Code: If you use the transmitter within a multichannel
system, you may remove the black plastic platelet and re-
place it with a colored platelet included in the optional Color
Coding Kit to identify each channel by a different color.
3f CHANNEL: This rotary switch selects the desired carrier fre-
quency.
Important: Prior to selecting frequencies, switch the transmitter
OFF.
3g Belt Clip for fixing the transmitter to your belt.
3h Battery Compartment: Refer to Section 9. Setting Up.
3i Antenna: Permanently connected, flexible antenna.
3j
GAIN: This rotary pot allows you to match the microphone or
instrument level to the transmitter's audio section.
3k Carrier Frequency Table: A label listing the available fre-
quencies is affixed to the transmitter rear panel.
3l
Frequency Set Designation : The label on the rear panel also
indicates the designation of the Frequency Set.
3m Security Cover: Protects the POWER and MIC switches from
being actuated unintentionally.
6.2. Microphones, Guitar Cable (optional)
The following AKG microphones have been designed specifically
for direct connection to the audio input of the PT 61 or PT 81:
C 417 L
C 419 L
C 420 L
CK 77 L
The MKG/L guitar cable from AKG lets you connect an electric
guitar, electric bass, or remote keyboard to the bodypack trans-
mitter.
6.3. Optional Accessories
CB 60 bag
Color Coding Kit
7. Frequencies
The transmitter and receiver of your WMS 61 or WMS 81 system
have been factory programmed for up to 15 selectable carrier fre-
quencies. The carrier frequency label (1k) on the receiver, (2g) on
the handheld transmitter, or (3k) on the bodypack transmitter lists
the Frequency Set your WMS 61 or WMS 81 system uses and
all available carrier frequencies.
7.1. Frequency Sets
Prior to powering up your WMS 61 or WMS 81 system, check
that the transmitter and receiver use the same Frequency Set. If they
do not, you may not be able to find a common carrier frequency
for the transmitter and receiver.
For currently available Frequency Sets and frequencies suited for
intermodulation-free simultaneous operation, refer to the Frequency
Lists in section 12.
7.2. Ordering Transmitters and Receivers
If you want to order additional transmitters or receivers operating
on the same set of frequencies as your original equipment, be sure
to state the designation of your original Frequency Set (1k/1l, 2i,
3k/3l) and the serial number of the original device. We need this
information to make sure your new equipment will be compatible
with the original units.
8. Multichannel Systems
Using optional RA 61 B or RA 81 B remote booster antennas, one
to three PS 61 or PS 81 Power Splitters, and a PSU 01 Central
Power Supply you can set up multichannel systems with a maxi-
mum of ten receivers and only two remote antennas. For detailed
instructions on how to set up and operate multichannel systems
refer to the PS 61 or PS 81 Manual.
In each carrier frequency table (1k, 2h, 3k), the basic frequencies
you can use simultaneously and without risk of intermodulation are
marked with *.
If you have any questions regarding allocated frequencies contact
your dealer, the competent authority, your AKG representative, or
the AKG head office in Vienna, Austria.
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