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Hearing Helper
™
Personal FM System • Model PFM 350 RCH
Hearing Helper
™
Personal FM System • Model PFM 350 RCH
ADAADA
©2006, Williams Sound Corp. MCAT
041B
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
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: 4.6 oz (130 g) with batteries
Color: Royal blue, shatter-resistant polypropylene
Battery Type: Two (2) AA 1.5 V non-rechargeable Alkaline batteries (BAT 001), 14 mA nom. current drain, 80
hours approx. life
(OR) Two (2) AA 1.5 V NiMH rechargeable batteries (BAT 026), 14 mA nominal current drain, 50
hours per charge approx., recharges in 14–16 hours, uses CHG 200 Charger
FCC ID: CNM R31
Operating Freq’s: Pre-tuned, field–tuneable, 72 MHz - 76 MHz*.
Pre-set channels are E (72.9 MHz) and G (75.7 MHz).
FM Deviation: Wide-band, 75 kHz, 75 µS de-emphasis
AFC Range: ± 120 kHz
Sensitivity: 4 µV at 12 dB Sinad with squelch defeated,
squelches at 10 µV for min. 50 dB S/N ratio
Freq Response: 100 to 10 kHz, + 3 dB
Signal-to-Noise Ratio: 50 dB at 10 uV
Receive Antenna: Integral with earphone cord
Audio Output: 35 mW, max. at 16 Ω
Output Connector: 3.5 mm mono phone jack
Squelch: Set to turn off audio under weak or no signal condition
Carrier Detect Ind: Red LED, turns on in the presence of a carrier
Controls:
Volume: Rotary, On/Off/Volume
Tone: 3-way slide switch; Lo: flat response (20 Hz), Mid: -3 dB at 235 Hz, Hi: -3 dB at 730 Hz
Channel: 2-way slide switch; Ch 1 = 72.9 MHz, Ch 2 = 75.7 MHz
Indicators: On/Off and FM
Mic Connector: 3.5 mm mono phone jack, supplies positive DC for Williams Sound electret mics
Microphone: Plug mount electret, omnidirectional, with windscreen, 3.5 mm mono phone plug (MIC 014)
Mic Volume: Rotary control
Note: Specifications are electrical performance
Warranty: 5 years, parts and labor (90 days on accessories)
PFM R31 FM Receiver:
EAR MIC
FM
Mic
FM
On
Min MaxOff Max
R31 Top
On Indicator
Mic
Jack
FM Volume
Mic
Volume
Mic Jack
FM
Indicator
Williams Sound
Hearing Helper
®
R31 Front
Tone
Control
Channel
1 or 2
R31 Rear
R31 Top
R31 Front
R31 Back
*DISCLAIMER: FCC RULES LIMIT USE OF THIS EQUIPMENT TO AUDITORY ASSISTANCE
FOR THE HANDICAPPED.