The R-392 receiver covers 0.5 to 32 megacycles in 32 bands of one megacycle. One the eight lower bands it operates as a triple conversion superhetrodyne with the first variable intermediate frequencies (VIF) in range of 9 to 18 mc. The second VIF is 2 to 3 mc and the fixed IF is 455 kc.
The following table shows the mixer frequencies and IF frequencies for each band position. This information comes from Chart b in paragraph 107 Rf and Variable If. Conversion Scheme.
Note that the first band mechanically covers 0 to 1 mc, but that the input circuits only tune 0.5 to 1 mc.