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- From: marcbg@metronet.com (Marc B. Grant)
- Newsgroups: rec.radio.amateur.misc
- Subject: FT-51R Mod # 1
- Date: 11 Dec 1994 23:19:21 GMT
- Organization: Texas Metronet, Inc 214/705-2901, login info
- Lines: 80
- Message-ID: <marcbg-1112941719470001@net49.metronet.com>
- NNTP-Posting-Host: net49.metronet.com
-
- OK, here's the first one I found, gives you rx/tx 140-174 MHz and rx/tx
- 420-470 MHz:
-
- DISCLAIMER: PERFORM THIS PROCEDURE AT YOUR OWN RISK. THE POSTER(S) OF
- THIS PROCEDURE ASSUME NO LIABILITY, AND THIS PROCEDURE IS POSTED FOR
- GENERAL INFORMATION ONLY. THE FT-51R RADIO IS NOT FCC-TYPE ACCEPTED FOR
- TRANSMISSION OUTSIDE OF THE AMATEUR RADIO FREQUENCIES. THIS MODIFICATION
- ENABLES TRANSMISSION ON FREQUENCIES OUTSIDE OF THE AMATEUR RADIO BAND, AND
- IS LEGAL FOR THOSE INDIVIDUALS WITH MARS/CAPS CERTIFICATES. THIS
- MODIFICATION REQUIRES THE USE OF A LOW POWER FINE TIP SOLDERING IRON.
- INDIVIDUALS WHO ARE NOT EXPERIENCED WITH SOLDERING OF SURFACE MOUNT
- TECHNOLOGY SHOULD NOT ATTEMPT THIS MODIFICATION, YOU COULD RUIN YOUR RADIO.
-
-
- 1. Remove the battery pack from the radio.
-
- 2. Remove the four screws directly beneath the battery pack on the radio.
-
- 3. Remove the two screws holding the contact portion of the battery
- compartment.
-
- 4. Remove the screw and battery pack release lever.
-
- (the following steps make removal of the battery holding compartment easier)
-
- 5. Remove the four screws on the bottom portion of the back of the
- cabinet. Carefully remove the two halves of the radio. Pay attention
- to the gasket as you are seperating the cabinet.
-
- 6. Remove the battery pack holding compartment.
-
- The section you will know be working with is directly underneath the
- battery pack holding compartment (behind the touch tone pad).
-
- 7. There is a ribbon cable connected to the control board. You can leave
- the ribbon cable attached if you're a GOOD solderer, or you can release
- the two little black levers on each side of the ribbon cable and CAREFULLY
- slide the ribbon cable out of the socket and hold it back towards the case
- with a piece of tape. Be careful not to put a bend in the ribbon cable or
- pierce it.
-
- 8. Locate a set of etched jumpers on the pc board. They are located
- adjacent to the bend in the ribbon cable. They are not marked, and are
- situated as follows (o-o indicates closed, o o indicates open):
-
-
- JP1001 o-o
- o o JP1005
- JP1002 o o
- o o JP1006
- JP1003 o o
- o-o JP1007
- JP1004 o-o
-
- 9. Using solder wick or your preferred method of solder-removal, carefully
- remove the jumper for JP1007. This enables the 134-174, 420-470 MHz
- transmit.
-
- 10. Reassemble the radio, remembering to reinstall the gasket, and to
- carefully reinsert the ribbon cable if you removed it from the socket,
- and fasten down the little black socket locks.
-
- 11. Press the MHZ /\ and MHZ \/ buttons simultaneously while turning the
- power on to the radio. This enables the modification.
-
- Some notes: I experimented with removing JP1004, and it had no apparent
- effect. I did not experiment with any of the other jumpers except
- JP1007. There still may be 800 MHz receive buried some where in the
- radio, the Japanese version has 800 MHz receive. An earlier posting of
- mine indicates four large resistors (well, non-surface mount) connected
- between various microprocessor and memory pins, clearly an add-on.
- Experimentation with removing these produced no effect, HOWEVER, this was
- prior to my discovery of the JP1007 mod. I've played with the radio
- enough now, and don't want to push my luck, so let's let someone else try
- to find out if there are any more secrets buried in this fine piece of
- gear.
-
- --
- Marc B. Grant
- marcbg@metronet.com
- Amateur Radio N5MEI
-
-
- From: danb@acme.csusb.edu (Dan Brown)
- Newsgroups: rec.radio.amateur.equipment
- Subject: FT-51 Mod sheet
- Date: 20 Jan 1995 00:10:55 GMT
- Organization: California State University Sacramento
- Lines: 84
- Message-ID: <3fmv2f$3sh@news.csus.edu>
- NNTP-Posting-Host: danb%@acme.csusb.edu
- X-Newsreader: TIN [version 1.2 PL2]
-
-
- I typed this in off the Yaesu mod sheet. If you kill your radio,
- don't blame me; I haven't tried it. Enjoy!
-
- 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
-
-
-