FMQ-Series 3.5 kW, 5 kW, 8 kW, & 10 kW
QEI FMQ Series FM Transmitters, precision crafted to be the very best. The FMQ-3500, FMQ-5000, FMQ-8000 and FMQ-10000 share unique design elements that offer unequaled performance at any price. Conservatively designed for decades of trouble free service the FMQ-Series provide a superb broadcast signal. The FMQ-3500, FMQ-5000 FMQ-8000 and FMQ-10000 utilize an inherently broadband design that is totally transparent. The Intermediate Power Amplifier (IPA) design draws on decades of QEI experience in solid state FM transmitters. The IPA is joined to a single grounded grid triode for outstanding performance and stability. These elements have evolved into a transmitter unmatched for its quality and reliability.
QEI engineers designed the FMQ-series to deliver what broadcasters need, RELIABILITY. Every step of the way QEI selected only the highest quality components. You can feel it in the smooth and precise control of the tuning and see it in the massive plate transformer. The FMQ series are the best broadcast transmitters available. The all solid state modular IPA delivers plenty of drive to the Power Amplifier (PA) tube, allowing generous headroom to ensure the output power remains precisely at its pre-set level.
The FMQ-3500, FMQ-5000 FMQ-8000 and FMQ-10000 power amplifiers use a single triode in grounded grid service. The grounded grid triode design offers inherently greater stability, better performance and is less critical in operation than its tetrode counterparts since it requires no neutralization or additional energy consuming power supplies. QEI perfected this design by eliminating the need for conventional plate blockers and sliding contacts. Tube life in the FMQ-3500, FMQ-5000 and FMQ-10000 is so outstanding, that QEI quarantees the PA tube operation for 15,000 Hours or Two Years (see warranty for specific details). QEI is pleased to include our spare parts kit free with every FMQ-series transmitter.
QEI pioneered single phase high power designs and continues to dominate the industry by offering the option of single and three phase power on all FMQ-series transmitters.
QEI's FMQ-3500, FMQ-5000 FMQ-8000 and FMQ-10000 share common elements of their design, and are easily and cost effectively upgraded in the field to 5 kW or 10 kW power levels.
The logically grouped metering and controls are clearly identified for the operator's convenience. A single panel shows total transmitter status at a glance. The remote control interface is easily connected to virtually all remote controls in use.
In addition to the FMQ-series ability to tout the best performance specifications, we are equally proud that they require the lowest maintenance. QEI FM Transmitters, invented, designed and manufactured with pride in the USA.
Technical Specifications
GENERAL
Power Output:
FMQ-3500: 1000 to 3750 Watts
FMQ-5000: 1800 to 5500 Watts
FMQ-8000: 2400 to 8000 Watts
FMQ-10000: 2400 to 10500 Watts
Frequency Range: 87.5 to 108 MHz (other frequencies optional)
RF Load Impedance: 50 ohms
RF Interstage Impedance: 50 ohms
Output Connector: 1 5/8" EIA flange (Other connectors are optional)
VSWR: 1.8:1 max. at full power (automatic arc suppression and power control for operation at reduced power into any phase or magnitude)
RF Harmonic/Spurious: Suppression meets or exceeds all FCC /DOC / CCIR specifications
Tube Complement:
FMQ-3500: single 3CX3000A7
FMQ-5000: single 3CX3000A7
FMQ-8000: single YU-148 (3CX6000A7)
FMQ-10000: single YU-148(3CX6000A7)
Exciter:
QEI model 675 (standard)
QEI model 695, 695-50, 695B, 695B-50 (optional)
Asynchronous AM S/N Ratio (AM Noise): -55dBc (no FM modulation present)
Synchronous AM S/N Ratio (Incidental AM): -50 dBc with 100 % FM modulation
ELECTRICAL/MECHANICAL
AC Power requirement: 208/240 VAC 50/60Hz single phase standard, three phase optional (tap range 198 to 250 VAC other line voltages and frequencies optional)
Power Consumption:
FMQ-3500: 6 kW at 3500 Watts
FMQ-5000: 8.6 kW at 5000 Watts
FMQ-8000: 13.8 kW at 8000 Watts
FMQ-10000: 17 kW at 10000 Watts
Ambient Temperature Range:
Operating: -15°C to +50°C
Startup: 0°C to +50°C
Maximum Altitude: 10,000 feet (3048m) AMSL
Maximum Humidity: 95% non-condensing
Make Up Air Requirements: (if exhaust stack is vented outside) 400 CFM
Cabinet Size: (overall dimension) 23"W (59 cm) X 37"D (94cm) X 76"H (193cm)
Cabinet Weight:
FMQ-3500/5000: 900 Lbs. (410 kg)
FMQ-10000: 1000 Lbs. (505 kg)
MODULATION PERFORMANCE
Since QEI's FMQ-Series grounded grid design provides the widest bandwidth available in a tube final, modulation specifications are exciter and stereo generator dependent. For optimum performance, QEI recommends the use of a QEI exciter and stereo generator which are optimized for system performance. See the appropriate exciter and stereo generator specification sheet for detailed wideband composite, monaural and stereo performance specifications.