Icom IC-746 PRO (IC 746 PRO IC746PRO) transceiver mods reviews software and diagrams

   
 
ham | what is new | links
 Welcome to Www.Hampedia.net  submit to reddit
11 May 2021, 11:33 UTC 


SDR


ELAD
SDRplay

Transceivers


Kenwood
Midland
Yaesu
Alinco
Icom
Other

Antennas


M2
Par
Gap
Sirio
Araki
Maco
Nil-Jon
Maldol
Comet
Hustler
Nagoya
Watson
Hy-Gain
Dressler
Cue Dee
Solarcon
Diamond
Cushcraft
Quicksilver
Moonraker

Power supplies


Powerbox
Kenwood
Diamond
Samlex
Mascot
Daiwa
Yaesu
Alinco
Icom
H&H

Rotators


M2
CDE
Yaesu
Create
Kenpro

Antenna tuners


MFJ
LDG
SGC
Icom
Yaesu
Mizuho
Dentron
Kenwood
Sommerkamp
Barker & Williamson

Repeaters


GME
Icom
Zodiac
Kenwood

Transverters


Microwave Modules
Tokyo Hy-Power
SSB Electronics
Tecnostudi
Kenwood
Yaesu
Minix

Meters


Diamond
Comet
Bird
MFJ

Ham resources


Propagation:
  Sporadic E skip (Es)
  Backscatter
  Tropo
  Meteor Scatter (MS)
  F2 Skip
  Aurora
  Trans-equatorial scatter (TE)
  Lightning scatter (LS)

Icom IC-746 PRO (IC 746 PRO IC746PRO)
IC-746 PRO
Programming interface schematics for Icom:
Programming software for Icom IC-746 PRO (IC 746 PRO IC746PRO) :
PDF User Manual for Icom IC-746 PRO (IC 746 PRO IC746PRO) : Icom IC-746 PRO Instruction Manual
PDF Adjusments Procedures Manual with schematics for Icom IC-746 PRO (IC 746 PRO IC746PRO) :
Schematics for Icom IC-746 PRO (IC 746 PRO IC746PRO) :

Mods for Icom IC-746 PRO (IC 746 PRO IC746PRO) :
    Icom IC-746 PRO (IC 746 PRO IC746PRO) Heatsink for PA Driver
    Icom IC-746 PRO (IC 746 PRO IC746PRO) backlight problem
    Icom IC-746 PRO (IC 746 PRO IC746PRO) Power adjust
    Icom IC-746 PRO (IC 746 PRO IC746PRO) AM tx improvements
    Icom IC-746 PRO (IC 746 PRO IC746PRO) Transmit Problem
    Icom IC-746 PRO (IC 746 PRO IC746PRO) SSB Monitor Level Fix
    Icom IC-746 PRO (IC 746 PRO IC746PRO) EU version
    Icom IC-746 PRO (IC 746 PRO IC746PRO) TX modification

Icom IC-746 PRO (IC 746 PRO IC746PRO) technical specifications :  Icom IC-746 PRO (IC 746 PRO IC746PRO) technical specifications



Icom IC-746 PRO (IC 746 PRO IC746PRO) Power adjust

For all those who wants a little more of driving power with the new IC-746,here is the way to do it easily.

Important settings pots within the IC-746 HF/VHF radio. Remove the twelve screws holding on the bottom cover. With the Radio laying flat on it's top remove the bottom cover.

Underneath the radio there is a board named MAIN UNIT (B5083J) where there are 4 important small pots provided to increase or decrease the power output in different bands as follow:

  • R-989 HF Power output (rated at 100W)

  • R-991 50 Mhz band Power Output (rated at 100W)

  • R-993 144Mhz band Power Output (rated at 100W)

  • R-994 AM Power output (rated at 40W)

  • R-546 Tx gain,set at factory for best linearity in TX IF (better not to play with it)

Do this totally at your own risk. Don't get more than 140 Wts in FM because with high SWR you might damage your final stage and void your factory warranty.

Note: Be sure to do all the setings over a pure 50 ohms dummy load.

On my particular radio (usa version) ser 3300++ i found a different board # and different variable resistors

THE BOARD # IS B5699G
R320-ADJ AM POWER
R317-ADJ VHF POWER
R311 ADJ 50 MHZ POWER
R306 ADJ HF POWER

CB Equipment


President
Midland
Uniden
Zodiac

 Power amplifiers


Beko
Icom
Alinco
Drake
Yaesu
Daiwa
Collins
Kenwood
DanAmps
Ameritron
Autophon
Eto/Alpha
Command Technologies
E.F.Johnson
Dentron Radio Co.

FRS/GMRS


Bell
GPX
ENC
Tekk
Icom
Sony
Alinco
Drake
Cobra
Maxon
Vertex
Conair
Uniden
Jenson
Ranger
Midland
Whistler
Magnum
Unwired
Coleman
Motorola
Audiovox
Memorex
Columbia
Samsung
Standard
Kenwood
Cherokee
Panasonic
Freetalker
Vtech Vtalk
RadioShack
Fanon Courier
Sharper Image
General Electric
Oregon Scientific

PMR446


Sommerkamp
FreeQuency
Goodmans
Kenwood
Lafayette
President
Binatone
Motorola
Multicom
Albrecht
Maycom
Topcom
Xtreme
Ondico
Telcom
Maxon
Vertex
Zodiac
Yaesu
Cobra
Alinco
Icom
Alan
ITT