Subject: Yeasu FT-840 general TX mod
From: "Donald J. Bensch Sr." 


Here's are some general TX mods for the Yeasu FT-840.  The first two
mods work and the last one does not. 

Special thanks goes to subbustr@whidbey.net (Dave M. Schertzer) for
the first mod, ory@olympic.net (Horace Ory) for getting the second mod 
to me and to John (G7MRI) for originally posting it on packet.  I also 
included a mod I found on the net that does NOT work for reference.
  
  Don (N8YIR)

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Subject: Re: ArtSci Book 
   Date: Sun, 31 Mar 1996 20:51:08 -0800 (PST) 
   From: subbustr@whidbey.net (DAVE M . SCHERTZER)
     To: "Donald J. Bensch Sr." 

Here iz what I got....

>|   Yaesu FT-840 Expanded RF
>|    All band modification:


1. Remove ant from radio.
2. Remove top and bottom covers.
3. On Local Unit , TEMPORARY jump TP-2003 to ground.
   (Take a wire lead + attach to the metal case)
4. Press & Hold (SSB) + (AM) and turn power on.
   (Display will show 02-OFF)
5. Rotate main control to show 02-ON
6. Press AM. The display should read (7.000.00 LSB)
7. Turn radio off.
8. Press and hold the memory (DOWN) + (UP) buttons and turn radio ON.
9. Turn the radio OFF.
10. Remove the jumper to ground on TP-2003.
11. Reassemble radio.


Think u were missing step #6. Mod taken from Book 8A
Gud luck.....hope this helps....dave

_________________________________________________________
David M Schertzer  NOPF Whidbey Is.WA  USA  Canadian NAVY
Email : subbustr@whidbey.net       HAM Radio : VE7-LFA/W7
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From: G7MRI@GB7LWB.#27.GBR.EU
To  : YAESU@WW

  Well guys i see that many people have been looking for mods for
  this radio so here is the out of band tx mod.

1. take off bottom and top covers.
2. connect a jumper from point TP2003 to ground. this is temporary
while preforming the programming steps. that point is in front and to
the edge of the lithium battery.
3. with the ft-840 off, press and hold the (SSB) & (AM) buttons at the
same time. turn on the rig, then release the buttons simultaneously.

4. the display  will show (02-ON). press the (AM) button to confirm
setting: it should read 7.000.00 LSB. turn rig off.
( If the rig does not show 02-on move the main freq knob to change it)

5. press and hold in the MEM , (DOWN) and (UP) buttons while turning
rig "on".
6. turn pwr off, and remove jumper.
7. if you have a problem, dump the backup memory by switching the back
up switch off per the manual.you can then redo the steps.

If you know of any mods please let me know and if you can find out what
01-ON/OFF   to   09-ON/OFF i think it goes to, what do the other settings do.

                          73's de John
                          G7MRI@GB7LWB.#27.GBR.EU
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The mod below was the only mod for the FT-840 that I could find on the net.
THE MOD BELOW DOES NOT WORK!!!  It is listed here for reference only.
Archievers might want to remove this mod if they have it.

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From: paul@theborg.mlb.fl.us (SysAdmin)
Subject: FT-840 Expanded RF Mod
Date: 10 Dec 94 08:02:20 EST

I saw many requests for this mod but never had a chance to post it till now.


    Yaesu FT-840 Expanded RF
    All band modification:

1. Remove bottom cover and locate vertical pin TP 2003.

2. Connect a jumper wire from this pin to ground.

3. Hold SSB button and AM button at the same time and turn the radio On.

4. Frequency display should read "02 OFF". Turn Frequency knob until display
   reads "02 ON". Now turn radio Off.

5. Hold VFO/M button and UP and DOWN buttons at the same time and turn the
   radio On.

6. Last, turn radio Off and remove jumper from Test Point 2003.

7. Reassemble radio.


This mod allows gerneral coverage transmit on the FT-840.
I assume no responsibility, proceed at your own risk.

----
73 de KE4QJA Paul
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