19
Williams Sound
®
Helping People Hear
PERSONAL PA RECEIVERS: MODEL R7*, MODEL R7-4
PERSONAL PA
®
VALUE PACK SYSTEM SPECIFICATIONS
PERSONAL PA TRANSMITTER MODEL 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
D
imensions & Weight: 3.25" W x 6.875" L x 1.75" H
(82.5 mm x 174.6 mm x 44.5 mm)
1
3 oz., 368.5 g
Color: Black
P
ower (U.S./Canada): 105-130 VAC, 50-60 Hz, .5 W
O
perating Frequencies: CH A (72.1 MHz), CH B (72.3 MHz),
CH C (72.5 MHz), CH D (72.7 MHz),
C
H E (72.9 MHz), CH F (75.5 MHz)
C
H G (75.7MHz), CH H (75.9MHz),
CH I (74.7 MHz), CH J (75.3 MHz),
C
H E (72.9 MHz) is standard
Frequency Selector: Internal switches, 10 channels
R
F Field Strength: 8000 µV/m at 30 m Max., 20 mW typical
N
ominal Range: 300–500 feet, 90–150 m
Modulation: 75 kHz (wide–band) max.
Stability: ± .005% over 0-50˚C
F
CC ID: CNMT17
Pre-Emphasis: 75 µS
Frequency Response: 100 Hz – 15 kHz ±3 dB
D
istortion: 1% Max. THD
S
ignal to Noise Ratio: 55–60 dB with R7 Receiver
Microphone Input: 3.5mm mini phone jack,
s
upplies +DC for electret mics
M
ic Input Level: 1–10 mV, nominal
Line-Level Input: RCA Jack, Hi Z, unbal.
L
ine Input Level: .1–1 Vrms, nominal
I
nput Attenuator: Pot, screwdriver-adjustable
Antenna Outputs: Thread Mount for “rubber duckie” flexible
w
hip antenna, optional 75 Ω Coaxial
A
ntenna (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.
(19 pages)
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