Subject: FT51 MOD
Newsgroups: rec.radio.amateur.misc

In article <3hbg59$39t@news.csus.edu> you write:
Marc B. Grant (marcbg@metronet.com) wrote:
: A few months ago I posted the mod to allow expanded receive on the
: FT-51R.  Has ANYONE checked out to see if there are more mods?  Is there
: more expanded receive other than 130-170 and 410-470?

	I posted this a while back, but here it is again...

YAESU FT-51R

Expanded Transmit 140-174 MHz, 420-470 MHz

MARS & CAP MODIFICATION

	This information is authorized for distribution only to 
individuals who are members of the U.S. Military Affiliate Radio System, 
Civil Air Patrol, or other government agency services specifically 
permitted by the FCC to use non-Type-Accepted equipment such as that 
utilized in the Amateur Radio Service.  Release of this information to 
individuals not bearing a license in the MARS, CAP, or other such 
government service is not authorized by Yaesu U.S.A.

	*	Remove Antenna and Battery

	*	Remove (6) black screws in rear plastic cover plate
		(where the battery would normally fit)

	*	Remove the (1) small black screw in the battery slide switch
		(see figure 1 below for screw locations)

	*	Loosen (but don't remove) the (4) black screws on the upper
		back of rear case and slightly separate the rear radio
		case.

	*	Remove the "L" type plastic cover

		CAUTION: Watch out for the delicate ribbon cable

	*	Locate and unsolder jumper pad #6 (see Figure 2 below
		for jumper locations) (Pads 1,7 should now be jumpered)
		(Stock, Pads 1,6,7 only)

	*	Reinstall the "L" type plastic cover

	*	Tighten the (4) case screws on rear case

	*	Re-install the (6) black screws in rear plastic cover
		plate.

	*	Re-install the (1) small black screw with the battery 
		slide switch

	*	Now attach the antenna and battery

	*	Turn off Radio...  Press and hold both UP & Down Arrows
		Keys (right side) while turning on the Radio

	*	Modification now complete!


	(Figure 1 not rendered; my ASCII art skills aren't that good)


	Figure 2:  Jumper locations.  For European tone burst, add solder 
to jumper 4.


	_________________________________________________
	|
	|      __________
	|      |        |    1 o
	|      |        |          o 2
	|      |        |    3 o
	|      |  CPU   |          o 4
	|      |        |    5 o
	|      |        |          o 6
	|      |________|    7 o
	|
	|
	|




 --
 Dan Brown, KE6MKS
 danb@acme.csusb.edu -- finger for PGP 2.6.1 public key
 Don't Tread on Me




From: taucom@kaiwan.com
Organization: Stat Gateway Service, WB7TPY
>Subject: Yaesu
X-Article: 722
Content-Type: text
Content-Length: 1896
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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.

I've also been told that the software can be controlled by an external
computer, by accessing the handshake via simultaneously pressing 2 and
9, and powering on (remember MH-29, model # of the LCD mike).  I don't
know what connector or software is needed.

Please send any info you have on these soft-mods.


 
          o _  \o/  _ o
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  _|__(\__/_|__/_\__|_\__/ /o
                               \   /
     Manny Tau WH6OQ             |
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