1978 May       QST                                     p. 20
               VHF Coverage for Collins S Line 
               Receivers

1979 February  QST                                     p. 30
               A Noise Blanker for the Collins S/Line

1982 January   QST                                     p. 22
               WARC Bands and 160 Meters on the 75S-1  3 pages