19
Williams Sound
®
Helping People Hear
PERSONAL PA R
ECEIVERS
: M
ODEL
R7*, M
ODEL
R7-4
PERSONAL PA
®
VALUE PACK SYSTEM SPECIFICATIONS
PERSONAL PA T
RANSMITTER
M
ODEL
T17
Model R7:
Single channel, Pre-Tuned, Adjustable
(72.9 MHz standard)
10 Channels Available (72.1-75.9 MHz)
Model R7–4:
4-Channel, Pre-Tuned, Selectable
CH A (72.1 MHz), CH C (72.5 MHz),
CH E (72.9 MHz), CH G (75.7 MHz)
(OR)
CH B (72.3 MHz), CH D (72.7 MHz),
CH F (75.5 MHz), CH H (75.9 MHz)
Dimensions & Weight:
3-5/8" L x 2-3/8" W x 7/8" H
(92.1 mm x 60.3 mm x 22.2 mm)
3.2 oz (90 g) with battery
Color:
Gray
Battery Type:
9 Volt, Eveready 216 Carbon,
Eveready 522 Alkaline, or
BAT 003 NiMH Rechargeable
Battery Drain:
14 mA, nominal
Battery Life:
32 hours with Eveready 522,
6 hours/charge with BAT 003
FCC ID:
CNM R7Y, CNM R74Y
Operating Frequencies:
Pre-Tuned, Adjustable, 72 MHz–76 MHz
Intermediate Freq.:
75 kHz
FM Deviation:
75 kHz
De-Emphasis:
75 µS
AFC Range:
± 300 kHz
Sensitivity:
2 µV at 12 dB Sinad with squelch defeated
Squelch:
Squelches at 10 µV for minimum
50 dB S/N ratio
Input Overload:
20 mV
Frequency Response:
100–10 kHz, ± 3 dB
Signal-to-Noise Ratio:
50 dB at 10 µV
Receive Antenna:
Integral with earphone/headphone cord
Audio Output:
250 mW, max. at 16 Ohms
Output Connector:
3.5 mm mini phone jack, also serves as a
charging jack for rechargeable battery
Earphone:
Earbud-type with foam cushion,
3.5 mm plug, 32
Ω
(Other styles available)
R7-4 Channel Selector:
4–position, rotary switch
Dimensions & Weight:
3.25" W x 6.875" L x 1.75" H
(82.5 mm x 174.6 mm x 44.5 mm)
13 oz., 368.5 g
Color:
Black
Power (U.S./Canada):
105-130 VAC, 50-60 Hz, .5 W
Operating Frequencies:
CH A (72.1 MHz), CH B (72.3 MHz),
CH C (72.5 MHz), CH D (72.7 MHz),
CH E (72.9 MHz), CH F (75.5 MHz)
CH G (75.7MHz), CH H (75.9MHz),
CH I (74.7 MHz), CH J (75.3 MHz),
CH E (72.9 MHz) is standard
Frequency Selector:
Internal switches, 10 channels
RF Field Strength:
8000 µV/m at 30 m Max., 20 mW typical
Nominal Range:
300–500 feet, 90–150 m
Modulation:
75 kHz (wide–band) max.
Stability:
± .005% over 0-50˚C
FCC ID:
CNMT17
Pre-Emphasis:
75 µS
Frequency Response:
100 Hz – 15 kHz ±3 dB
Distortion:
1% Max. THD
Signal to Noise Ratio:
55–60 dB with R7 Receiver
Microphone Input:
3.5mm mini phone jack,
suDC for electret mics
Mic Input Level:
1–10 mV, nominal
Line-Level Input:
RCA Jack, Hi Z, unbal.
Line Input Level:
.1–1 Vrms, nominal
Input Attenuator:
Pot, screwdriver-adjustable
Antenna Outputs:
Thread Mount for “rubber duckie” flexible
whip antenna, optional 75
Ω
Coaxial
Antenna (ANT 005) uses RG-59 cable,
400 ft. (140 m) max. cable length
*NOTE: Specific receiver model numbers contain a frequency code. For example, Model R7E is preset to channel E (72.9 MHz).
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
NOTE:
FCC Rules limit the use of the 72–76 MHz band to auditory assistance for the handicapped.
Specific transmitter model names contain a frequency code. For example, Model T17E is preset to channel E, 72.9 MHz.
Summary of Contents for PPA VPE
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