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.
Band(mc)
| 1st Xtal |
(mc) 1st VIF | (mc) 2nd Xtal |
(mc) 2nd VIF |
(mc) VFO |
(mc) Fixed IF | (kc) |
| 0.5 - 1 | 9 | 9.5 - 10 | 12 | 2.5 - 2 | 2.955 - 2.455 | 455 |
| 1 - 2 | 8 | 9 - 10 | 12 | 3 - 2 | 3.455 - 2.455 | 455 |
| 2 - 3 | 10 | 12 - 13 | 15 | 3 - 2 | 3.455 - 2.455 | 455 |
| 3 - 4 | 12.6 | 15.6 - 16.6 | 18.6 (3x6.2) |
3 - 2 | 3.455 - 2.455 | 455 |
| 4 - 5 | 7 | 11 - 12 | 14 | 3 - 2 | 3.455 - 2.455 | 455 |
| 5 - 6 | 8 | 13 - 14 | 16 (2x8) |
3 - 2 | 3.455 - 2.455 | 455 |
| 6 - 7 | 9 | 15 - 16 | 18 (2x9) |
3 - 2 | 3.455 - 2.455 | 455 |
| 7 - 8 | 10 | 17 - 18 | 20 (2x10) |
3 - 2 | 3.455 - 2.455 | 455 |
| 8 - 9 | 11 | 3 - 2 | 3.455 - 2.455 | 455 | ||
| 9 - 10 | 12 | 3 - 2 | 3.455 - 2.455 | 455 | ||
| 10 - 11 | 13 | 3 - 2 | 3.455 - 2.455 | 455 | ||
| 11 - 12 | 14 | 3 - 2 | 3.455 - 2.455 | 455 | ||
| 12 - 13 | 15 | 3 - 2 | 3.455 - 2.455 | 455 | ||
| 13 - 14 | 16 | 3 - 2 | 3.455 - 2.455 | 455 | ||
| 14 - 15 | 17 (2x8.5) |
3 - 2 | 3.455 - 2.455 | 455 | ||
| 15 - 16 | 18 (2x9) |
3 - 2 | 3.455 - 2.455 | 455 | ||
| 16 - 17 | 19 (2x9.5) |
3 - 2 | 3.455 - 2.455 | 455 | ||
| 17 - 18 | 20 (2x10) |
3 - 2 | 3.455 - 2.455 | 455 | ||
| 18 - 19 | 21 (2x10.5) |
3 - 2 | 3.455 - 2.455 | 455 | ||
| 19 - 20 | 22 (2x11) |
3 - 2 | 3.455 - 2.455 | 455 | ||
| 20 - 21 | 23 (2x11.5) |
3 - 2 | 3.455 - 2.455 | 455 | ||
| 21 - 22 | 24 (2x12) |
3 - 2 | 3.455 - 2.455 | 455 | ||
| 22 - 23 | 25 (2x12.5) |
3 - 2 | 3.455 - 2.455 | 455 | ||
| 23 - 24 | 26 (2x13) |
3 - 2 | 3.455 - 2.455 | 455 | ||
| 24 - 25 | 27 (3x9) |
3 - 2 | 3.455 - 2.455 | 455 | ||
| 25 - 26 | 28 (2x14) |
3 - 2 | 3.455 - 2.455 | 455 | ||
| 26 - 27 | 29 (3x9.666) |
3 - 2 | 3.455 - 2.455 | 455 | ||
| 27 - 28 | 30 (3x10) |
3 - 2 | 3.455 - 2.455 | 455 | ||
| 28 - 29 | 31 (3x10.333) |
3 - 2 | 3.455 - 2.455 | 455 | ||
| 29 - 30 | 32 (3x10.666) |
3 - 2 | 3.455 - 2.455 | 455 | ||
| 30 - 31 | 33 (3x11) |
3 - 2 | 3.455 - 2.455 | 455 | ||
| 31 - 32 | 34 (3x11.333) |
3 - 2 | 3.455 - 2.455 | 455 | ||
Band(mc)
| 1st Xtal |
(mc) 1st VIF | (mc) 2nd Xtal |
(mc) 2nd VIF |
(mc) VFO |
(mc) Fixed IF | (kc) |