The new NXP LDMOS MRF1K50h makes it possible to create highly rugged 1200-1400W pallets for high VSWR industrial and broadcast (analog and digital) applications.
Device: NXP MRF1K50H
87% efficiency max @ 108Mhz CW.
Up to 1400W with 8W input at 52V
Recommended voltage supply: 50V DC
Supply current: 32A
Operating Temperature range: 0 to +70 °C ( at Device Flange )
Storage Temperature range: -30 to +90 °C
Load Mismatch: 65:1 (all phase angle)
Ensure sufficient airflow across the top of the pallet, the PCB can get hot at max power
Frequency Range: 87.5 to 108 Mhz
Power Gain: 22dB typ. ±1dB
Power Output: 1250W typ.
Power Input: 7W typ.
Efficiency: 85% max. @ 108Mhz FM CW.
Supply Voltage: 50V typ, 52V max
Size (LxWxH): 130x62x30mm
F2 Second Harmonic: -35dB typ.
F3 Third Harmonic: -35dB typ.
You can find special 50V power supply for this amplifier here!
- Ensure shielding between final stage and audio stage with exciter. Install a good feed-through capacitor on the supply +48V wiring feeding the power output stage. This will keep and RF from the power line.
- Excessive drive level can damage this amplifier; design of equipment where the amplifier will be mounted must foresee an appropriate protection circuits.
- Amplifier efficiency is function of supply voltage, in order to obtain max efficiency please reduce supply in function of desired output power. Generally best compromise between efficiency and harmonic emission, is obtained when the amplifier work at about 2-3 dB of gain compression.
- RF pallets are sensitive devices, if you do not have sufficient experience please consider a fully finished product instead. They can be burned by applying too much drive power, too high supply voltage, not using proper heatsink, using filter with unsufficient specifications, connecting mismatched loads or no load at all and also by soldering coax with too long leads. For this reason there is no warranty for any pallet. We do assure you that every pallet is tested and is 100% operational as it leaves our workshop.
Quantity discount is available and shipping becomes a lot cheaper per unit as quantity goes up. For additional info and prices please ask for a quote here.
NOTE: The pallet amplifier is shipped without the connectors shown on the photo and final design was altered somewhat (photo coming soon).