1000W VHF Band III / DAB TV Pallet
This design is based on the BLF188XR NXP 50V LDMOS transistors. The pallet is ideal for digital radio and digital/analog VHF TV broadcast applications.
Output power: 1150Wp typ
– 250Wrms DVB/T
– 300Wrms DAB
– 25 dB gain typical
– Shoulder distance pre-corrected -30dB
– Max mismatch: 20:1, all phase
– Power Req. 40 volts @ 35A
– Efficiency (250W DVB-T): 30% min
– Efficiency (1000W Analog TV): 45% min, 36% typ
– Temperature compensated bias (5A bias current)
– Operating temp. range: 0C to 85C
– LDMOS NXP BLF188XR devices
– Size: 190x85x23mm (7,48″x3,34″x0,90″)
– Datasheet on request
Photo may slightly differ from the actual product as new versions are coming up.
– Due to the high gain of this pallet, a good shielding between final stage and any driver/low power stage is required. Please foresee a good RF choke also on the supply wiring.
– 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 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.