3_35_kHz_VARACTOR_TUNER

Published:2009/7/13 23:12:00 Author:May | From:SeekIC

Variable oscillator for 80-meter SSB transceiver is tuned by 1N594 diode. MPFl02 FET serves as source-follower buffer, With values shown, full excursion of R8 tunes oscillator from 3.045 to 3.545 MHz. Use well-regulated 12-V source. R9 allows synchronization of receive and transmit frequencies. K1 is 4PDT relay used for switching supply voltage and antenna from transmit to receive. L8 is 40 turns No. 32 on 1/4-in slug-tuned form.-W. J. Weiser, Integrated Circuit SSB Transceiver for 80 Meters, Ham Radio, April 1976, p 48-52.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Basic_Circuit/3_35_kHz_VARACTOR_TUNER.html

Print this Page | Comments | Reading(3)