La Page de G1IVG
Note:
If you only wish to extend the RX and not the TX of the radio have a look at the resistor configuration at position number J4 in your radio (This is shown open in the photo below). if J4 it's fitted remove it. This will open the RX to allow the radio to receive outside the normal amateur bands. If you have a resistor or solder link in the position of J4, then your radio should be locked to RX only within the amateur bands on VHF and UHF.
The configuration of the resistors can done by simply replacing a resistor by soldering a blob of solder to bridge the gap in place of were a resistor should be.
if your not sure in any way about the mods, don't be afraid to ask. I will try to help you the best I can.
General Coverage TX Mods by G1IVG.
Procedure.
NOTE:
The photo below shows the radio "AFTER" the modification.
Notes from the photo above:
The coverage of the radio
after the modification.
Receiver (the same as before the modification)
Band Min RX freq. Max RX freq.
H.F. 100KHz 37MHz
VHF (A) 37MHz 76MHz
VHF (B) 108MHz 174MHz
UHF 410MHz 512MHz
Transmitter
Band Min TX freq. Max TX freq.
H.F. 1.8MHz 37MHz
VHF (A) 37MHz 76MHz
VHF (B) 137MHz 174MHz
UHF 410MHz 470MHz
If you decide to carryout the same modification on your FT847, then you do so at your own risk.
This TX modification verified to work on the following serial numbers:
Note: "XXX" replaces the last three digits of the serial number for privacy reasons.
8C020XXX 8F040XXX
8G051XXX 8G060XXX 8G070XXX
8H080XXX 8H090XXX 8I100XXX
8J120XXX 8K130XXX 8K150XXX 8K151XXX
8L160XXX 8N170XXX 9I240XXX
9I250XXX 0D280xxx OE310XXX
Configuration of Chip Resistors.
Please let me know if there any mistakes in the chart below. As far as I know the information is correct, however proceed at your own risk. colinlowe@jet.es
TX Frequency Range |
RX Frequency Range |
Jumpers |
Remarks |
|||||||||||
HF |
VHF |
UHF |
HF |
VHF(M) |
VHF |
UHF |
1 |
2 |
3 |
4 |
5 |
6 |
FM CH Step |
RPT Shift |
1 |
144-146 |
430-450 |
0.1-30 50-54 |
144-146 |
430-450 |
X |
X |
X |
X |
5/20kHz |
0.6/5 MHz |
|||
1 |
144-148 |
430-450 |
0.1-37 37-76 |
108-174 |
420-512 |
X |
X |
X |
5/20kHz |
0.6/5 MHz |
||||
2 |
140-154 |
420-450 |
0.1-37 37-76 |
108-174 |
420-512 |
X |
X |
5/20kHz |
0.6/5 MHz |
|||||
3 |
144-146 |
430-440 |
0.1-30 50-54 |
144-146 |
430-440 |
X |
X |
X |
X |
12.5/25kHz |
0.6/7.5 MHz |
|||
3 |
144-146 |
430-440 |
0.1-37 37-76 |
108-174 |
420-512 |
X |
X |
X |
12.5/25kHz |
0.6/7.5 MHz |
||||
2 |
140-154 |
420-450 |
0.1-37 37-76 |
108-174 |
420-512 |
X |
X |
12.5/25kHz |
0.6/7.5 MHz |
|||||
4 |
144-146 |
430-440 |
0.1-30 50-54 |
70.00-70.50 |
144-146 |
430-440 |
X |
X |
X |
X |
X |
12.5/25kHz |
0.6/1.6 MHz |
|
4 |
144-146 |
430-440 |
0.1-37 37-76 |
108-174 |
420-512 |
X |
X |
X |
X |
12.5/25kHz |
0.6/1.6 MHz |
|||
5 |
140-154 |
420-450 |
0.1-37 37-76 |
108-174 |
420-512 |
X |
X |
X |
12.5/25kHz |
0.6/1.6 MHz |
||||
6 |
144-146 |
432-438 |
0.1-30 50-54 |
144-148 |
432-438 |
X |
X |
X |
X |
12.5/25kHz |
0.6/1.6 MHz |
|||
6 |
144-146 |
432-438 |
0.1-37 37-76 |
108-174 |
420-512 |
X |
X |
X |
12.5/25kHz |
0.6/1.6 MHz |
||||
7 |
144-148 |
430-450 |
0.1-30 50-54 |
144-148 |
430-450 |
X |
X |
X |
X |
X |
5/25kHz |
0.6/5 MHz |
||
7 |
144-148 |
430-450 |
0.1-37 37-76 |
108-174 |
420-512 |
X |
X |
X |
X |
5/25kHz |
0.6/5 MHz |
|||
8 |
144-146 |
430-440 |
0.1-30 50-54 |
144-146 |
430-440 |
X |
X |
X |
X |
X |
12.5/25kHz |
0.6/1.6 MHz |
||
8 |
144-146 |
430-440 |
0.1-37 37-76 |
108-174 |
420-512 |
X |
X |
X |
X |
12.5/25kHz |
0.6/1.6 MHz |
|||
2 |
140-154 |
420-450 |
0.1-37 37-76 |
108-174 |
420-512 |
X |
X |
X |
12.5/25kHz |
0.6/1.6 MHz |
For HF, 6mtrs and 4mtrs range see table below.
160m |
80m |
40m |
30m |
20m |
17m |
15m |
12m |
10m |
6m |
4m |
|
1 |
1.800-2.000 |
3.500-4.000 |
7.000-7.300 |
10.100-10.150 |
14.000-14.350 |
18.068-18.168 |
21.000-21.450 |
24.890-24.990 |
28.000-29.700 |
50.000-54.000 |
|
2 |
1.800-2.000 |
3.500-4.000 |
7.000-7.500 |
10.000-10.500 |
14.000-14.500 |
18.000-18.500 |
21.000-21.500 |
24.500-25.000 |
28.000-30.000 |
50.000-54.000 |
|
3 |
1.815-1.890 |
3.500-3.800 |
7.000-7.100 |
10.100-10.150 |
14.000-14.350 |
18.068-18.168 |
21.000-21.450 |
24.890-24.990 |
28.000-29.700 |
50.080-50.400 |
|
4 |
1.810-2.000 |
3.500-3.800 |
7.000-7.100 |
10.100-10.150 |
14.000-14.350 |
18.068-18.168 |
21.000-21.450 |
24.890-24.990 |
28.000-29.700 |
50.000-52.000 |
70.000-70.500 |
5 |
1.800-2.000 |
3.500-4.000 |
7.000-7.500 |
10.000-10.500 |
14.000-14.500 |
18.000-18.500 |
21.000-21.500 |
24.500-25.000 |
28.000-30.000 |
50.000-52.000 |
70.000-70.500 |
6 |
1.820-1.890 |
3.500-3.800 |
7.000-7.100 |
10.100-10.150 |
14.000-14.350 |
18.068-18.168 |
21.000-21.450 |
24.890-24.990 |
28.000-29.700 |
50.000-52.000 |
|
7 |
1.800-2.000 |
3.500-4.000 |
7.000-7.500 |
10.000-10.500 |
14.000-14.500 |
18.000-18.500 |
21.000-21.500 |
24.500-25.000 |
28.000-30.000 |
50.000-52.000 |
|
8 |
1.810-1.850 |
3.500-3.800 |
7.000-7.100 |
10.100-10.150 |
14.000-14.350 |
18.068-18.168 |
21.000-21.450 |
24.890-24.990 |
28.000-29.700 |
50.200-51.200 |
Download Kantronics KPC9612 Interface diagram
Download SSTV Interface diagram
FT847 Links
Peter, DH1NGP FT847 Supercontrol software
Yaesu FT847 Product Information.
Please send me the URL of any pages regarding the Yaesu FT847, to add to these links.