Williams Sound
®
Helping People Hear
15
T
ECHNICAL
S
PECIFICATIONS
FM Transmitter
Models:
T1-173.400, T1-174.100, T1-174.300, T1-175.500, T1-176.300
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:
4.4 oz (125 g) with batteries
Color:
Neptune blue, shatter-resistant polypropylene
Battery Type:
Two (2) AA 1.5 V Non-rechargeable Alkaline batteries
(BAT 001), 100 mA nominal current drain, 12 hours approx. life
(OR)
Two (2) AA 1.5 V NiMH Rechargeable batteries (BAT 026),
8 hours per charge approx., recharges in 14–16 hours, uses CHG 1600 Multiple Battery Charger
Operating Frequencies:
Fixed 173.400 (UK only), 174.100, 174.300, 175.500, 176.300 MHz
Stability:
± .005%, crystal reference
Modulation:
Narrow-band FM, 10 kHz, 100 µS pre-emphasis
RF Output:
1.5 mW typical
Freq Response:
100 Hz to 10 kHz, ± 3 dB at 1% max. THD
Signal–Noise Ratio:
55 - 60 dB, with R1-173 Receiver
Compressor:
Compressor uses adjustable slope and noise gate
Transmit Antenna:
Integral with 39" microphone cord
Microphone:
Lavalier microphone, omni condenser, 39 in. cord, 3.5 mm mono phone plug (MIC 090)
Controls & Indicators:
On/Off switch, slide-type; “On” Indicator LED
Mic Connector:
3.5 mm mono phone jack
Charging Contacts:
Designed for use with CHG 1600 and CHG 200 Multiple Battery Chargers
Approvals:
MPT 1345, ETS 300 422, CE
FM Receiver
Models:
R1-173.400, R1-174.100, R1-174.300, R1-175.500, R1-176.300
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:
Neptune blue, shatter-resistant polypropylene
Battery Type:
Two (2) AA 1.5 V non-rechargeable Alkaline batteries
(BAT 001), 42 mA nom. current drain, 30 hours approx. life
(OR)
Two (2) AA 1.5 V NiMH rechargeable batteries (BAT 026),
20 hours per charge approx., recharges in 14–16 hours, uses CHG 1600
Multiple Battery Charger
Operating Frequencies:
Fixed 173.400 (UK only), 174.100, 174.300, 175.500, 176.300 MHz
Stability:
± .005%, crystal reference
FM Deviation:
Narrow-band FM, 10 kHz, 100 µS de-emphasis
AFC Range:
± 120 kHz
Sensitivity:
.5 µV at 12 dB Sinad with squelch defeated,
squelches at 8 µV for min. 50 dB S/N ratio
Freq Response:
200 Hz to 10 kHz, +2, –4 dB
Signal–Noise Ratio:
60 dB at 10 µV
Receive Antenna:
Integral with earphone cord
Audio Output:
35 mW, max. at 16
Ω
; for use with 8–32
Ω
mono headphones
Output Connector:
3.5 mm mono phone jack
Squelch:
Set to turn off audio under weak or no signal condition
Controls:
Volume: thumbwheel/on/off/volume
Indicators:
“On” LED
Approvals:
MPT 1345, ETS 300 422, CE
Note:
Specifications are electrical performance
Summary of Contents for PFM 173
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