Hammarlund's original ad for the 170 said, "for single sideband at its very best."  The HC-10 SB convertor had the same IF as the 170, so it's good.  The 170 is ham-band only, 160-6 meters, triple conversion on 40 & higher, double on 160 & 80.

HQ-170 no. 2, s/n 104, finished 5/23/02 (sold @$385)

    Cabinet stripped & repainted, panel stripped, painted, silk-screened.  Electrical work done as req'd (not much), added fil. xfmr to keep 1st conv. osc. filament on all the time, and SS rectifier, similar to the "A" model.  Full alignment.  

    This unit has a "quartz" digiclock, and a white faced meter from a different HQ model.  There are 3 added jacks on the rear skirt, RCA for 6m ant., BNC for HF ant., RCA for IF out.  There are 4 small holes in the cabinet top, which have been filled with flathead phillips screws, painted to match, almost indiscernible in the pix, and a very slight dimple near them.  (A prev. owner had mounted a speaker in the cabinet.)