The perfect choice for the lower power broadcaster, the FM300T is an economical stand-alone 300W FM transmitter with a built-in audio processor and stereo generator that delivers a consistently high level of performance.
Featuring low loss circuit boards and copper heat spreaders in the RF chain, it functions with less heat and improved life span. A robust power supply with switching voltage and power regulators for AC or DC operation let you use it anywhere power can be generated.
To see the owners manual for the Crown FM 30, click on this
Crown FM30 / FM150 / FM300 Owners Manual
Main Features:
• Transmitter with a built-in audio processor and stereo generator
• Frequency Agile from front panel
• SWR metering from remote control
• Ability to control output power from remote control
• 5-Year warranty
• Meets or exceeds all FCC requirements
| FM300 TECHNICAL SPECIFICATIONS |
| Frequency Range |
87 to 108MHz (Japanese frequency available 74-90MHz as an option) Front panel agile |
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| RF Power |
30 to 300 watts with front panel adjustment |
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| RF Output Impedance |
50 Ohms unbalanced |
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| VSWR |
1.7:1 Maximum with automatic foldback at higher VSWR |
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| Frequency Stability |
Better than +/- .1KHz over operating temperature range |
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| Modulation Type |
Direct Frequency Modulation of Carrier |
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| Modulation Indication |
LED Indicators with Peak indicators |
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| FM S/N Ratio (FM noise) |
Better than 60 dB (70 to 80 dB typical) |
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| Asynchronous AM S/N Ratio |
Better than 50 dB referenced to 100% modulation @ 100 Hz, no de-emphasis. |
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| Synchronous AM S/N Ratio |
Better than 50 dB with 100% modulation @ 100 Hz, no de-emphasis (typical >60dB) |
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| RF Harmonics/Spurious Products |
Better than –70 dB (80 dB typical) |
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| RF Bandwidth |
+/- 120 KHz, better than –35 dB; +/- 240 KHz better than –45 dB |
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| Temperature |
0 to 50 degrees C |
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| Humidity |
0 to 80% @ 20 degrees C (non-condensing) |
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| Maximum Altitude |
10,000 ft (3,000 m) |
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| AC power |
100 to 120 or 220 to 240 volts AC +/- 10%, 50 to 60 Hz |
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| Power factor |
Greater than 97% (lagging) |
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| DC Power |
36 to 72 VDC (72V required for full output) |
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| Power Consumption |
700VA |
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| Regulatory Notification for FCC part 73 and 74 |
Meets FCC requirements |
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| RF Output connector |
Standard type N, 50 Ohm |
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| Chassis dimensions |
5.25 x 16.5 x 17.5 inches (13.4 x 41.9 x 44.5 cm) exclusive of rack mounts but inclusive of connectors |
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| Weight |
33 pounds (14.9 Kg) shipping weight = 41 Pounds (18.6 Kg) |
| Wide Band composite operation |
| Composite Inputs |
1 |
| Composite Input level |
3.8 Vp-p for +/-75KHz deviation |
| Composite total harmonic distortion + noise |
< 0.05% from 50Hz to 15 Hz (0.03 typical) |
| Sub-carrier inputs |
3 |
| Sub-carrier input level |
3.8 Vp-p for +/-75KHz deviation |
| Sub-carrier amplitude response |
+/-0.3 dB from 40Hz to |
| Monaural operation w/ built in Audio Processor |
| Audio Input impedance |
50 Kohms bridging, balanced |
| Audio Input level |
3.8 Vp-p for +/-75KHz deviation |
| Audio Frequency response |
Conforms to 75uS pre-emphasis curve for +/- 0.25 dB from 50Hz to 15KHz |
| Pre-emphasis |
Selectable 50, 75 uS or flat |
|
|
| Stereo Operation w/ built in Audio Processor and Stereo Generator |
| Audio Input impedance |
50 Kohms bridging, balanced |
| Audio Input level |
-10 dBm to +10 dBm selectable for 75KHz deviation @400Hz |
| Frequency response |
+/- 0.3 dB from 50Hz to 10KHz, +/- 1.0dB from 10Hz to 15KHZ |
| Total Harmonic distortion + Noise |
0.4% or less @ 15KHz (0.2 typical) |
| Stereo Separation |
Better than 40 dB from 50Hz to 15KHz |
| Linear Cross Talk |
Main to sub and sub to main, -40 dB or better from 50 Hz to 15 KHz |
| 38 KHz Sub-carrier suppression |
>60dB |
| Pilot Stability |
+/-.5 Hz @ 9% modulation |
*Please consult a broadcast engineer to determine if this unit is right for your application and you are meeting all of the appropriate legal requirements. You can review the FCC regulations on LPFM and unlicensed usage below.
https://www.fcc.gov/media/radio/low-power-radio-general-information#PART15
