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- 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
-
- From: "Rafel" <jarel@box43.gnet.pl>
- Subject: IC706Mk2 mod
-
- If you can read this, its come from Your www:
-
- Len - KC2ADV
- email: lenny@handy-man.com
- ... wrote:
-
- ...
- >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.
-
- For first, my circuit board part number is B4916F, i don`t understand you
- what diodes i must cut off, explain me, my smd diodes looks like this:
-
- O<>O 7
- O O 6
- O<>O 5
- J25 O<>O 4
- O<>O 3
- O O O O
- 1[] [] 2 B4916F 8[] []9
- O O O O
- CP3
- <__]
-
-
- Diodes: 1,2,3,4,5,7,8,9 are instaled
- Diode: 6 is not instaled
-
- My version is with Tone 1750Hz, European i think, RX 30kHz-200MHz, TX in
- amateur bands only,
- the serial number if needed is: 02101 buyed in 18.06.97 as new in Poland.
- Sorry for my bugs.
-
- Can You type me what diodes ? I think 1 and 3.
-
-
- Rafa┤ SP6-1313WR, Klub SP6KBE :) Kontakt: jarel@box43.gnet.pl
-
-
- -------------------------------------------------------------------------------
- Dostep do internetu 56 Kbps Flex / 64 Kbps ISDN http://www.getin.com.pl
- Darmowe konta pocztowe w sieci GETIN. http://box43.gnet.pl
- GETIN Internet Service Provider http://www.gnet.pl
- -------------------------------------------------------------------------------
-
- Info on the diodes from another European user:
-
- d129
- ---- (d111 none)
- d112
- d113
- d114
-
- d d d d
- 1 1 1 1
- 1 1 1 1
- 6 5 8 9
-
- D116 and D118 are responsible for out of band TX. D115 and D119 enables
- RX from 30KHz to 200MHz. D113 is responsible for 6M RX and D114 is
- responsible for 6M TX. I do not have info about D129 and D112.
-
-
- Rafa3 SP6-1313WR, Klub SP6KBE :) Kontakt: jarel@box43.gnet.pl
-
-