If you have to add diodes, try to use the ones that you had to remove(and make sure to install them in the correct direction-they ARE Surface Mount Devices):ĭ55 (no diode) 0 - I forgot to note if there was a diode in this position. USA radios are easy to modify as the only change is to remove D57. This means that you may have to add or remove diodes in the left column depending on where you purchased your IC7800. NONE OF THE DIODES IN THE RIGHT COLUMN ARE CHANGED!! The diodes in the left column must be configured exactly as shown below. The bottom 4 diodes in each column are offset slightly to the right as pictured below. Near the center of the Logic Unit (below and to the right of a processor chip) you will see 2 vertical rows of diodes / diode spaces. You may find it easier to access the diodes by setting radio up on its right side. Tilt up front panel(you may have to loosen and remove 2 connectors on lower left side of front panel) to expose the Logic Unit sitting vertically on the left side of the main chassis unit behind the front panel. Remove 4 small screws holding front panel onto main chassis(2 per side). The IC-7800 can be modified for general coverage transmit(1.6 thru 54.0 MHZ) (Frequency Range and Specifications cannot be guaranteed after modification) by following the CAP/MARS directions below: Icom IC-7800 (IC 7800 IC7800) technical specifications Icom IC-7800 (IC 7800 IC7800) technical specifications :
Icom IC-7800 (IC 7800 IC7800) General Coverage Transmit Mod
PDF Adjusments Procedures Manual with schematics for Icom IC-7800 (IC 7800 IC7800) : Icom IC 7800 Adjustment Procedures Manual PDF User Manual for Icom IC-7800 : Icom IC 7800 Instruction Manual Programming software for Icom IC-7800 (IC 7800 IC7800) : 2.0 is displayed at the lower right corner of the display when the radio is first switched on during the boot up sequence if it has the 3kHz roofing upgrade.Programming interface schematics for Icom:
Important Upgrade Note: Icom has produced an important upgrade for the IC-7800. And Icom really stands behind this radio with a limited two year factory warranty. The high resolution 7 inch TFT color LCD display provides more operating information than you've ever had before, including a spectrum scope. This radio covers the HF ham bands plus 6 meters (receive from 30 kHz - 60 MHz).
The supplied accessories include: rack mounting ears, compact flash and various plugs (mic not supplied). A 120 V AC switching power supply is built-in.
The newly designed push-pull MOSFET amplifiers work with a 48 V DC, providing a powerful 200 watts of output at full duty cycle with low IMD in all bands. And nothing is sacrificed on the transmit side. The rear panel features four primary antenna inputs plus provisions for receive antenna A and B. There is even a separate preamp and mixer for the 6 meter band. And you enjoy this incredible performance in two fully independent receiver circuits controlled on the left side of the radio. By sparing no expense an incredible +40dBm intercept point has been achieved with ultra wide dynamic range. As impressive as the features are it is performance that sets this radio apart. It utilizes four separate 32-bit floating point DSP chips, has a 7-inch wide TFT display, built in RTTY/PSK31 receive and transmit plus compact flash technology. The Icom IC-7800 is clearly one the most advanced amateur radio ever developed.