L1, Q1, L2, and L3 compose an RF amp’’fter stage that feeds Ml, a doubly balanced mixer. Q4 is alocal oscillator stage In the 375-MHz range Signals h the 420 ‰to 450-MHz range from Q1 are mixed in M1 and fed through filter L6/L7/C17, where only the 60- to 70-MHz (CH3 CH4) signals pass. The IF signal is passed to Q3, an IF amplifier. The overall
gatrns 25 dB and the noise figure less than 2 dB. A kit of all parts, including the PC board, is available from North Country Radio, P. O. Box 53, Wykagyl Station, New Rochelle, NY 10804.