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The Modification listed below FT-51R with a important step.
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Kevin K. of Yaesu provided some great info about their new FT-51R HT, at the
recent meeting. He also described some undocumented features.  For
those who want a hardcopy of this, here it is.

YAESU FT-51R Soft-Modifications - undocumented:  February 1995

The new FT-51R utilizes software to control the various deeper level
functions instead of some traditional pots.

To access this undocumented menu:

1.  Turn on radio, and select band you want to modify.
2.  Turn off the radio.
3.  Simultaneously press the 2 VOLUME keys and the CALL buttons while
    powering on.
4.  You're now in the soft-mods menu.
5.  You'll now see the following menu choices while turning the DIAL
    knob:

    BAND 1 (top of menu)
    IF NO 0
    S-FULL84
    S-1 19
    SQL TH64
    SQL TI4E
    MOD L 25
    MOD H 27

The only soft-mod I'm familiar with so far, is to change the deviation
setting for the mike.
Turn the dial until you see MOD L 25:
    1.  Press the FUNCTION key down for 1/2 sec. until F flashes.
    2.  Press the /\MHz or \/MHz to change the numerical value.
    3.  Press the FUNCTION key again to save this change.
    4.  Do the same for MOD H 27.
    5.  Power off.
I'm not sure exactly what the numerical values mean, so experimenting
is in order.

I'm also unclear as to what the other menu items are.  I believe they
have to do with squelch settings, i.e., threshold.
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Now for my comments. I found out using my FT-51R that when you are done getting
the settings correct, Push the CALL button to finish (don't just turn it off).
You will here a "High" beep and it will automatically return to normal.
If you don't hit the "CALL" button to store it will just return to the settings
that you started with. At least this is the way it is working on my FT-51R.

Have been only playing with the "MOD L" and "MOD H". I'am not sure what the
diffrence is either between the two either. However always felt the TX audio
was weak on the FT51 and now it's ALOT better. On my sample I found the values
of 31 on the VHF and 29 on the UHF worked alot better on MY SAMPLE. This will
more than likely vary from sample to sample ??

The "BAND" one looks very intresting, however I cannot get any number changes
to work here on mine. Anyone else have any corrections,additions and or
comments,and I will compile and repost for all.

ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»
º  KB2LJJ BBS  RADIO MODS BATABASE  º   All the MODS are captured by packet.
ÈÍÍÍÍÍÍÍÍÍÍÍ»       ÉÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ   This BBS takes no responsability or
ÉÍÍÍÍÍÍÍÍÍÍͼ       ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»   liability for any damege resulting
º     KB2LJJ @ KB2LJJ.NJ.USA.NA     º   from any modification.
ÈÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ   73s John kb2ljj SySoP