antenna, contact your dealer or Williams Sound.
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
Antenna Mounting Stud (Top Panel): For use with the “rubber duckie” type antenna supplied.
Power Input Jack: Connects to the plug on the wall transformer power supply 12 VAC, 100 mA
PERSONAL PA Receivers: Model PPA R7*, Model R7-4
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: 3-5/8" L x 2-3/8" W x 7/8" H (92.1 mm x 60.3 mm x 22.2 mm)
Weight: 3.2 oz (90 g) with battery
Color: Gray
Battery Type: 9 Volt, Eveready 216 Carbon, Eveready 522 Alkaline, or BAT 003 Ni-Cad 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
*Note: Specific receiver model numbers contain a frequency code. For example, Model R7E is
preset to channel E (72.9 MHz).
