| ICOM IC-706 MK II G WIDEBAND TRANSMIT MOD |
This
modification of the Icom 706 MK IIG will enable wide band transmit capability
on
HF,
VHF and UHF bands. When modified the radio will also transmit
AM mode in the
aircraft
band with approximately 1 watt at 118 mhz to about 17 watts am carrier
at 136
mhz.
Wide band transmit mod for the IC-706 MK II G requires removal of diode D.2030.
1. Remove top cover to access main board.
2. Locate IC chip 4052C-8B99.
3. Orient the radio so that you are
reading the chip number from left to right.
4. Look just left to the left
of the chip to locate 11 solder pads running vertically.
5. Diode D.2030 is the tenth diode down
from the top of the solder pads on USA Version radio.
6. Remove diode.
TOP VIEW OF RADIO (FRONT)
(REAR)
ENLARGED VIEW OF ABOVE NOTED AREA
ARROW
POINTS TO DIODE D.2030. REMOVE THIS DIODE.
TRANSMIT POWER OUTPUT AFTER MODIFICATION
Power output in watts as measured from an uncalibrated
Diawa CN-620 wattmeter
|
|
|
|
|
FM PWR |
| 105 MHZ | 1.0 | 0.0 | 400 MHZ | 2.0 |
| 110 | 1.0 | 0.0 | 405 | 7.0 |
| 115 | 2.0 | 0.0 | 410 | 9.0 |
| 118 | 3.5 | 0.7 | 415 | 10.0 |
| 120 | 5.0 | 1.0 | 420 | 12.0 |
| 125 | 14.0 | 3.5 | 425 | 15.0 |
| 130 | 20.0 | 15.0 | 430 | 18.0 |
| 135 | 25.0 | 17.0 | 435 | 20.0 |
| 140 | 28.0 | 18.0 | 440 | 20.0 |
| 145 | 32.0 | 18.0 | 445 | 19.0 |
| 150 | 32.0 | 18.0 | 450 | 18.0 |
| 155 | 20.0 | 18.0 | 455 | 15.0 |
| 160 | 13.0 | 10.0 | 460 | 8.0 |
| 165 | 6.0 | 1.5 | 465 | 0.8 |
| 170 | 1.5 | 0.0 | 467 | 0.15 |
| 175 | 0.5 | 470 | 0.00 | |
| 180 | 0.1 | |||
| 185 | 0.0 |