Tl is tuned to converter-output frequency Ul to provide 45-to-50-dB gain, depending on the design of Tl and T2. C2, C
3, C4, C5, and C6 are bypass capacitors. R5 is a bias resistor. Gain is set by Rl, which controls the voltage on pin 5 of Ul. Tl and T2 should provide source and load impedance of l-kft and 3- to 10-KOhmhm, respectively. R3 supplies dc bias to other stages, if required.