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 Continental
816R3B
25 KW FM Transmitter
MECHANICAL
Weight: 1958
lbs (890 kg)
Size –
Transmitter: Height: 69 in (175 cm)
(Not Including
Directional Coupler) Width: 72 in (183 cm) Depth: 28 in (71 cm)
Ventilation:
Squirrel cage type blower mounted under the cavity. Axial fan that
provides positive air pressure within the entire cabinet
Ambient
Temperature Range:4°F to + 122°F operating (-20°C to +50°C)
Relative
Humidity Range: Up to 7500 ft (2285m) at 104°F (+40°C)
Altitude Up to
10000 ft (3046m) at 104°F (+40°C) with optional high altitude blower
Shock and
Vibration: Normal handling & transportation
Finish: Front
Panel: Tan Cabinet: Brown
ELECTRICAL
Frequency
Range: 88 to 108 MHz
Output
Power: 10,000 watts to 25,000 watts
Output
Impedance: 50 ohms, VSWR 2:1 Maximum
Standing Wave
Ratio: Not to exceed 2:1 (Refer to Figure 3-9)
Power Source:
200 to 250 volts, 60 Hz, 3 phase Available voltage taps on
transformer: 200, 210, 220,230,240 and 250. 50 Hz operation
available on special order
Power Line
Variations: ±5% overall power line variations; in addition, the
phase angle and voltage unbalance shall be within 5% of the average
of all three phases
Harmonic &
Spurious Radiation: Any emission appearing on a frequency removed
from the carrier by between 120 kHz and 240 kHz inclusive is
attenuated at least 25 dB below the level of the unmodulated carrier
Any emission
appearing on a frequency removed from the carrier by more than 240
kHz and up to and including 600 kHz is attenuated at least 35 dB
below the level of the unmodulated carrier
Any emission
appearing on a frequency removed from the carrier by more than 600
kHz is attenuated at least 80 dB below the level of the unmodulated
carrier
Modulation
Characteristics: Wideband direct FM
Input Power
Requirements: 40 kW at 0.9 Power Factor
(at 25 kW
output)
Excitation
Source: Continental 802A exciter capable of accepting an input
signal of from 20 Hz to 100kHz
Output
Impedance: 50 Ohms, unbalanced
Carrier
Frequency Stability: Frequency will not vary more than ±250 Hz for
an ambient temperature range of +32°F to +131°F (0 to +55°C)
Modulation
Input
Monaural: 600
Ohms, balanced, +10 dBm ±2 dB, for ±75 kHz deviation
Composite:
5,000 Ohms, balanced or unbalanced, 1.25 Vrms, for ±75kHz deviation
SCA: (2ea)
15,000 Ohms, balanced or unbalanced, 1.25 Vrms, for ±7.5 kHz
deviation
Audio
Frequency Response
Monaural:
±0.5 dB; flat, 25, 50, 75 microsecond pre-emphasis, 20 Hz to 15
kHz.
Audio
Frequency Distortion: Monaural: Not more than 0.08%, 20 Hz to 15 kHz
(Measured with spectrum analyzer)
FM Noise
Level: 75 dB below 100% modulation (±75kHz)
AM Noise
Level: Asynchronous: 55 dB below equivalent 100% AM modulation
Synchronous:
50 dB below equivalent 100% AM modulation
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