Note
QST, Nov 1977, pp. 130–131.
QST, Apr 1978, p. 90. Good photo.
QST, Sep 1979, pp. 206-207. (full specs)
QST, Nov 1979, p. 161. Good photo of the add-on modules.
QST, Jan 1980 p. 115.
Available in 5 versions with various combinations of the three bands.