User's Manual Part 2

IV-1
Section IV – RF Components
Amplifier Pallets
The UHFTV-10 pallet is a two stage ultra linear class-A linear pallet. It has an adjustable gain of 26dB
to 37dBand draws no more than 5.o Adc total drain current (the exact bias and drain currents of your
system are found in the spec sheet supplied with each manual). The quiescent and drain currents can
be measured on the UHFTV-10 pallet by measuring the voltage drop across the current sense resistor
found directly at the DC power supply lead input to the pallet. This resistance is 0.01-ohms, providing a
10mV per ampere ratio.
The UHFTV-150 pallet used in the driver and final amplification stages use LDMOS (Laterally Diffused
Metal Oxide Semiconductor) technology. LDMOS technology offers higher gain, efficiency and linearity
over standard MOSFET and Bipolar devices. LDMOS transistors have the added advantage of not
having BEO (Beryllium Oxide) in their construction. The UHFTV-150 amplifier pallets have a typical
gain of 13 dB and draw no more than 14Adc (again, the exact bias and drain currents of your system
are found in the spec sheet supplied with each manual). Currents for these pallets must be measured
with an ammeter in series with the power supply lead. Temperature compensated biasing helps ensure
steady operating levels over wide temperature ranges.
Each of the amplifier pallets is connectorized. All amplifier pallets must have the transistor drain
voltages reach at least 26Vdc before the RF drive is applied.