Kenwood TH-F6A Service Manual page 8

TH-F6A/F7E
* TH-F6A Frequency Construction
B band RX FM mode Double Super Heterodyne
RX Freq. Range [MHz] VCO Oscillation [MHz]
0.100 22.995
23.000 103.995
104.000 266.995
267.000 409.995
410.000 469.995
470.000 591.995
592.000 706.995
707.000 707.995
708.000 851.995
852.000 868.995
869.000 896.995
897.000 922.995
923.000 938.995
939.000 1009.995
1010.000 1299.995
B band RX WFM mode Single Super Heterodyne
RX Freq. Range [MHz] VCO Oscillation [MHz]
29.700
55.000
92.000
130.800
151.000
310.000
450.000
660.000
8
CIRCUIT DESCRIPTION
2nd
Audio
2nd IF
Mixer
2nd LO
Multiply Devide
461.600 644.760 1
322.400 646.380 1
323.200 649.190 1
324.600 467.595 1
352.400 412.395 1
527.600 649.595 1
534.400 649.395 1
382.300 382.798 2
325.200 397.198 2
454.800 463.298 2
405.700 419.698 2
477.300 490.298 2
432.700 440.698 2
498.300 533.798 2
476.200 621.198 2
Audio
1st IF
VCO
54.995 324.000 526.360
91.995 353.600 649.560
130.795 324.800 479.980
150.995 566.400 647.180
309.995 323.600 641.590
449.995 320.800 460.795
659.995 439.200 649.195
1299.995 324.600 644.598
1st
Amplifier
1st IF
Mixer
Devider
VCO
Multiplyer
Fig.9
1st LO 1st Mix.
8 57.700 80.595 Upper
4 80.600 161.595 Upper
2 161.600 324.595 Upper
1 324.600 467.595 Upper
1 352.400 412.395 Lower
1 527.600 649.595 Upper
1 534.400 649.395 Lower
1 764.600 765.595 Upper
1 650.400 794.395 Lower
1 909.600 926.595 Upper
1 811.400 839.395 Lower
1 954.600 980.595 Upper
1 865.400 881.395 Lower
1 996.600 1067.595 Upper
1 952.400 1242.395 Lower
Table.6
1st
Amplifier
Mixer
Devider
Multiplyer
Fig.10
Multiply Devide 1st LO
1 8 40.500
1 8 44.200
1 4 81.200 119.995
1 4 141.600 161.795
1 2 161.800 320.795
1 1 320.800 460.795
1 1 439.200 649.195
2 1 649.200 1289.195
Table.7
1st IF 2nd LO
[MHz] [MHz] 2nd Mix.
57.6 57.15 Lower
57.6 57.15 Lower
57.6 57.15 Lower
57.6 57.15 Lower
57.6 57.15 Lower
57.6 57.15 Lower
57.6 57.15 Lower
57.6 57.15 Lower
57.6 57.15 Lower
57.6 57.15 Lower
57.6 57.15 Lower
57.6 57.15 Lower
57.6 57.15 Lower
57.6 57.15 Lower
57.6 57.15 Lower
1st IF
1st Mix. [MHz]
65.795 Upper 10.8
81.195 Lower 10.8
Lower 10.8
Upper 10.8
Upper 10.8
Upper 10.8
Lower 10.8
Lower 10.8
2nd IF
[kHz]
450
450
450
450
450
450
450
450
450
450
450
450
450
450
450