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) |
|