The enclosed files support a Direct Digital Synthesis VFO designed by Curtis Pruess, WB2V, and presented in QEX (July, 1997, p 3).

Directory DDS_VFO contains listing, source and object files for the project as first presented.

Directory DDS_VFO3 contains revised listing, source and object files for the project as first presented.

In a second article (Jan, 1999, p 42), Curtis described how to temperature correct the DDS VFO by means of a PIC1674 microprocessor.

Directory Tempcomp contains a source file for the PIC.


QEX is a periodical publication of the American Radio Relay League (ARRL), 225 Main St, Newington, CT 06111-1494; tel 860-594-0200; http://www.arrl.org. Please address comments to QEX@arrl.org.

Updated 9-Dec-98


Robert J. Schetgen, KU7G/1	American Radio Relay League
Senior Assistant Technical Editor	225 Main St
QST Team 			Newington, CT 06111-1494
Hints & Kinks Editor   	
QEX Managing Editor		e-mail: rschetgen@arrl.org  
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