The ARRL handbook for the radio amateur 

 - 69th ed. 
 - Newington  American Radio Relay League  1992 
 - 39-18+indexp.  figs; illus; index; plates 
<br/><br/><label>ISBN: </label>0-87259-169-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Modulation MethodsRadio Equipment-constructionRadio Equipment-maintenance
<br/><br/><label>Universal Decimal Class. No.: </label>621.396.6(02)  / ARRL