20_METER_DIRECT_CONVERSION_CW_SSB

Published:2009/7/16 4:53:00 Author:Jessie | From:SeekIC

Simple direct-conversion or synchrodyne receiver uses RCA CA3127E five-transistor array. Product detector follows 14-MHz RF stage. Low drain makes receiver ideal for battery operation, but circuit has no AGC. AF output will drive headphones adequately for strong 20-meter signals, but not loudspeaker. Local-oscillator energy at 14-14.4 MHz for product detector at 1.5－2 VRMS must be furnished by external BFO.－D. DeMaw, Understanding Linear ICs, QST Jan. 1977, p 11-15.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Power_Supply_Circuit/20_METER_DIRECT_CONVERSION_CW_SSB.html

Print this Page | Comments | Reading(3)