copied from packet:
From: KA4NMX@N4HWU
To: MODS@ALLUSA
Subject: PRO-43 800 RESTORATION !      

                      Pro-43 Modification

Note: It is not lawful to monitor cellular or conventional
mobile telephone conversations.  This is just to restore the
Pro-43 to it's original capabilitys produced by the Pro-43's
microprocessor.

The following procedure requires familiarity with microcircuit 
soldering and will void your warranty.

TOOLS NEEDED: Fine point,low power soldering pencil; soler wick
              or  a desoldering tool; pointed awl; hemostats or
              pointed tweezers; small phillips; solder


(1)  Remove the battery, antennna and back cover (held in place
     by four screws).

(2)  Remove the six screws holding the top circuit board in 
     place. Carefully unsolder the two antenna connections from
     the board. Bend the antenna ground tab fully up from the
     board. Carefully lift the board, unplugging the black
     connector at its base, and lay the board out of the way
     on its bundle of colored wires.

(3)  Remove the two screws from the next board and lift it,
     carefully unplugging the white connector at the bottom
     of the board. Lift it up and lay it aside on its brown 
     wire (which can be unplugged if necessary).

(4)  Unsolder and remove the metal shield from the final board
     revealing the microprocessor; note the row of diodes
     labelled D1-D5 above it.  Only D1, D2, and D4 are present;
     assisted by a pointed tool, unsolder and remove D4, the
     lone diode (this restores cellular frequencies which will
     be searched in 30 Khz steps).

(5)  Resolder the removed diode carefully into postion D3 to
     extend low band coverage to 88Mhz.

(6)  Reassemble the boards, paying particular attention to the
     alignment of the plugs. Test the radio by entering any
     frequency between 870 and 890 Mhz and 51-88 Mhz.

                       End of upgrade.


Hope this helps with the Pro-43. I have found this to be a
great little scanner.  Hope you enjoy it and have fun.

73's DE...Russell...KA4NMX @N4HU-2
==========================================================================
Note: I haven't tried or verified this, proceed at your own risk.  WA2ISE


WA2ISE de N6IIU-1 BBS, 1258 Hrs: Enter Command (or '?')  [Last Msg=2314] **>
r 2315
Date: 25 Jun 93 23:00
Message-ID: <19333@N4HWU>
From: KA4NMX@N4HWU
To: MODS@ALLUSA
Subject: PRO-43 UPGRADE AVALIBLE       
Path: N6IIU!N0ARY!W2XO!KD4CCU!KA3NVP!W3IXR!N4HWU

If the above upgrade did not come thru completely, I will be
glad to send you a printed copy. Just send a reply to this
message or write me at A.D. below.

Russell England
547 Garden Creek Rd.
Marion, N.C.  28752
(704)-652-6116
KA4NMX  @N4HWU-2, #Tryon.WNC.NC.USA.NA.


WA2ISE de N6IIU-1 BBS, 1259 Hrs: Enter Command (or '?')  [Last Msg=2315] **>