PPA T20 TRANSMITTER SPECIFICATIONS
PERSONAL PA Transmitter Model T20
Dimensions, Weight:
8.45" (21.5 cm) W x 8.18" (20.8 cm) D
x 1.72" (4.4 cm) H, 3lbs. (1.5 kg)
Color:
Black epoxy paint with white legends
Rack Mount:
One IEC rack space high, one or two units can
be mounted in a single rack space with
optional RPK 005 (single) or RPK 006 (double)
Rack Mount Kits
Power:
External power supply(TFP 016), 24 VAC,
50 or 60 Hz, 10 VA, 230 mA max. current drain
FCC ID:
CNMT20
Operating Freqs:
72–76 MHz, 10 wide–band and
10 narrow–band channels,
Stability:
±.005% stability, 0-50˚ C
Deviation:
± 75 kHz max. for wide–band channels,
± 5 kHz max for narrow–band channels
Pre-Emphasis:
Wide-band: 75 µsec, narrow–band: 300 µsec
RF Field Strength:
8000 µV/m at 30 m max., 20 mW typical
Nominal Range:
300-500 ft. (90-150 m)
AGC Options:
(1) standard variable slope compressor/limiter
(2) Noise Reduction (3) Soft Limit (4) Hard Limit
Frequency Response:
WB: 30 Hz – 15 kHz ±3 dB, .25% Max. THD
NB: 30 Hz – 5 kHz ±3 dB, .25% Max. THD
Signal to Noise Ratio:
50 dB with PPA R19 Receiver
Front Panel:
Power Indicator:
Green LED
RF Indicators:
Green LED “On” indicates transmitter RF is on
Amber LED “WB” indicates wide–band
channel selected
Amber LED “NB” indicates narrow–band
channel selected
Recommended Receivers
Audio Indicators:
Amber LED “Ok” for nominal input signal level
Red LED “Hi” for excessive input signal level
Audio Level Control:
Rotary pot, screwdriver adjust, used with audio
indicator lights
Tape Output:
1/4" jack, 600 mV, 100
Ω
source impedance,
also drives mono or stereo headphone
Rear Panel:
Audio Inputs:
All inputs are actively mixed into a single signal,
allowing use of mono, stereo, 3 channel, or
4 channel audio sources
Balanced Audio Input:
Combination 3-pin female XLR/1/4" stereo jack,
accepts balanced or unbalanced microphone
and line level inputs, 25 V or 70 V audio input
Mic Input Levels:
Lo-Z, 100 µV min. to 50 mV max. 1 mV nominal,
3 k
Ω
input impedance Supplies simplex power
20 V (DIN45596) for condenser mics
Line Input Levels:
21 mV min. to 10 V max., 212 mV nominal,
100 K
Ω
input impedance
70 Volt Input Levels:
216 mV min. to 100 V max., 2.16 V nominal,
100 K
Ω
input impedance
Unbal. Audio Inputs:
Four screw terminals, three unbalanced line-
level inputs, one ground, actively mixed
Input Selector Switch:
3-position slide-type, selects: mic/line/70 V on
combination XLR/Phone audio input jack
High-Pass Filter Switch:
3-position slide-type, 20 Hz, 175 Hz, or 725 Hz,
6 dB/octave roll-off
RF Output Switch:
3-position slide-type, Full power, – 6dB, – 12dB
Antenna Outputs:
Thread Mount for “rubber duckie” flexible whip
antenna, optional hard-wired 75
Ω
Coaxial
Antenna (ANT 005) uses RG-59 cable,
400 ft., (140 m) max. cable length
Power Connections:
3-pin Molex connector
Channel Selector:
2 rotary switches set the operating frequency
PERSONAL PA Receivers: Model R19*, Model R19-4*, Model R19-6*
Model PPA R19:
2-Channel, Pre-Tuned, Selectable
CH 33 (72.9 MHz), CH 53 (75.7 MHz) standard
10 Channels Available (72.1-75.9 MHz)
Model PPA R19–4:
4-Channel, Pre-Tuned, Selectable
CH 13 (72.1 MHz), CH 23 (72.5 MHz),
CH 33 (72.9 MHz), CH 53 (75.7 MHz)
Model PPA R19–6:
6-Channel, Pre-Tuned, Selectable
CH 13 (72.1 MHz), CH 23 (72.5 MHz),
CH 33 (72.9 MHz), CH 53 (75.7 MHz)
CH 38 (74.7 MHz), CH 43 (75.3 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:
Neptune Blue
Battery Type:
(2) BAT 001 AA Alkaline
or (2) BAT 026 Ni-Cad
Battery Drain:
20 mA, nominal
Battery Life:
90–100 hrs with 2 AA Alkaline
45-50 hrs/charge with BAT 026
Operating Freq:
Crystal controlled. See factory for frequency
changing instructions.
Intermediate Freqs:
10.7 MHz, 455 kHz
FCC ID:
Earphone:
Output Connector:
FM Deviation:
De-Emphasis:
Sensitivity:
Squelch Level:
Frequency Response:
Receiver Antenna:
Signal-to-Noise Ratio:
Audio Output:
Acoustic Output:
CONTROLS
Tone:
Volume & On/Off:
Channel Selector:
CNMR19
Earbud-type with foam cushion,
3.5 mm plug, mono, 32
Ω
3.5 mm mini phone jack, mono
Narrow–band, 5 kHz
300 µS
0.7 µV at 12 dB Sinad
4 µV for minimum 40 dB S/N ratio
100 – 5 kHz, ± 3 dB (Tone: Lo)
Integral with earphone cord
50dB
35 mW, max. at 16
Ω
(Tone: Lo; 3 VDC Bat.)
125 dB Max SSPL90 with EAR 013
Switched Low-Cut
Lo: 20 Hz / Mid: 120 Hz / Hi: 700 Hz
Combination, integral
PPA R19: 2-position, slide switch
PPA R19-4: 4-position, rotary switch
PPA R19-6: 6-position, rotary switch
*NOTE:
Specific receiver model numbers contain a frequency code. For example, Model R19/33/53 is preset to
channels 33 and 53. The R19 and R19-4 Receivers are crystal-controlled for optimal stability. If the standard
R19 or R19-4 channels cannot be used, the receiver must be returned to the factory for alternate crystals.
Williams Sound Corp.
10399 West 70th St., Eden Prairie, MN 55344-3459
U.S.A. 800-843-3544 / 952-943-2252 / FAX: 952-943-2174
© 1996, Williams Sound Corp. MAN 062B
Summary of Contents for PERSONAL PA System 500
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