432_MHz_PREAMP

Published:2009/7/16 6:59:00 Author:Jessie | From:SeekIC

Developed as part of 400-MHz radiotelescope, for low-noise operation. Gain is 12 dB, and noise figure is below 2 dB. Circuit is basic common-emitter amplifier with tuned input and output. Neither neutralization nor shielding are needed. Supply can be 9-V transistor radio battery. Current drain is 3mA. L1 and L2 are each 1 turn No. 16 wire3/8 inch in diameter, with L2 center-tapped.-S. A, Maas, An Inexpensive Low Noise Preamplifier for 432 MHz, QST, Jan. 1975, p 21-22.



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