Subject: ICOM 706 MKII Extended transmit mod
From: "Len SantaMaria, KC2ADV"

_______________________________________
Extended transmit mod for the ICOM 706 MKII

This file may be freely distributed as long as it remains intact, with
no
modifications, additions, or deletions.
 
DISCLAIMER:
I assume no responsibility for damage or inaccuracies contained in this
document. In other words, USE THIS AT YOUR OWN RISK. It worked for me,
however I don't know if it will work for you.

WARNING #1: This mod requires the ability to remove surface mount
diodes.
Only those who are qualified to do this should attempt this mod.

WARNING #2: This mod seems to erase all memory channels, etc. You may
want
to save this info for reprogramming.

Disassembly:
1. Face the front of the radio towards you.
2. Remove the three screws in a row across the middle of the top of the
radio.
3. Remove the two screws at the top rear (on the sides) of the radio.
4. Pry the top cover off from the back.
5. Disconnect the speaker at the connector.
 
Modification:
6. Near the top rear of the main circuit board, there is an small,
oblong
metal can. Directly below the right side of this can is two surface
mount
diodes with a white silk-screened box around them. There is also what
appears to be a circuit board part number just to the left of it (mine
says
B4916D). Remove the LEFT diode in the box.
7. To the left of this, there is a test point marked CP3. Just to the
left
and above this test point is another box with two *vertically* mounted
surface-mount diodes (Note: there is also a place for 5 more
*horizontally*
mounted diodes, with 3 installed). Remove the LEFT vertically oriented
diode.

Reassembly:
8. Reconnect the speaker.
9. Put the top cover back on. Insert the top cover tabs into the slots
and
lower into position.
10. Replace all of the screws.

My radio did not require a reset, however I did lose all of my channel
memories. It seems to be able to transmit everywhere except below .5
Mhz. I
have not tested the power output at all frequencies yet.

I hope this helps everyone who have been waiting patiently for this mod.
 
Any comments can be directed to me:
Len - KC2ADV  
email: lenny@handy-man.com