106 lines
4.5 KiB
Plaintext
106 lines
4.5 KiB
Plaintext
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From: MBramwel@business.uwo.CA (Mark Bramwell 519 661-3714)
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Sender: daemon@ucbvax.BERKELEY.EDU
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Bearcat 760XLT mods
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From: <postmaster@whutt.UUCP>
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Subject: 760XLT MODS
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Subject: Bearcat Mods
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Concerning the Uniden Bearcat 760xlt, the mod for the 950xlt does work
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to restore lost freq. Disconnect pin 20 of the microprocessor from the
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circuit board and connect it to pin 19. I bent the pin slightly and cut
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it with the scissors of a swiss army knife then soldered an 1/8 lead
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cut from a cap across the pins near the top of the chip. I've yet to
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find any problem with this mod. But as always do so at your own risk.
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73 Mike WA2E @ K2DLJ
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RERUN...BY...GENE...N0KGX
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BC760XLT.1
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THE FOLLOWING "MAGICAL" MODIFICATION WILL ALLOW RECEPTION OF CELLUAR PHONE
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BAND ON A BEARCAT 760XLT. NOTE- THIS MODIFICATION SHOULD BE PERFORMED BY
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SOMEONE VERY FAMILIAR WITH ELECTRONIC COMPONETS. THIS WILL ALSO VOID
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YOUR WARRANTY. AUTHOR ASSUMES NO RESPONSIBILITY WHATSOEVER.
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1- Disconnect power cord from wall outlet, remove the four screws
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holding the bottom cover on. Remove bottom cover carefully, speaker
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wires are attached.
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2- Locate the large 64 pin microprocessor chip near front of the radio.
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Noting the indented dot which marks pin one, count along row to pin
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20. Cut that pin close to the circuit board so if you ever want you
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could tack solder it back together.
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Chip im my unit has following numbers:
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7D3
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HD 40740085
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JAPAN
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3- tTemporarily reconnect power to the radio and attempt to program 845.000
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Mhz., confirming cellur band restoration. Frequencies may be entered in
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12.5 Khz, not 30 Khz, increments.
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4- This completes the magical instructions, disconnect power, reassemble
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scanner in reverse order. Rember performing this magic voids your
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warranty, not to mention the fact it is illegal and if the King's
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"henchmen" catch you, you mab be severely fined or maby even thrown into
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dungeon.
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Msg#: 1 *VHF/UHF RADIO*
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03-29-88 10:19:30
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From: JOHN STOVER
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To: ALL
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Subj: BC950 CMT
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Newest from Uniden/Bearcat, the BC950 XLT (also know as the BC780XLT) can be
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modified for CMT coverage. Cut pin 20 of the main CPU at the PCB and lift it.
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Then solder a bridge between pins 19 and 20. This will restore CMT coverage.
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PROBLEM: If you have the CTCSS option installed, you will not be able to turn
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it off! (The CTCSS option, that is.) If this is OK with you, then go for it,
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otherwise consider which you need more, CMT or CTCSS! Also, the only known
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difference between the two aforementioned scanners is that the 950 is labeled
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(on the box) "Scanner World". Have fun!
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Date: WEDNESDAY 02/15/89 08:49:47 EDT
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From: <watmath!julian!business.uwo.ca!bitlib>
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Subject: 760XLT MODS
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To: whutt!TGC168 (TIMOTHY G CULVER +1 201 386 7187)
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Netlanders:
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Concerning the Uniden Bearcat 760xlt, the mod for the 950xlt does work
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to restore lost freq. Disconnect pin 20 of the microprocessor from the
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circuit board and connect it to pin 19. I bent the pin slightly and cut
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it with the scissors of a swiss army knife then soldered an 1/8 lead
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cut from a cap across the pins near the top of the chip. I've yet to
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find any problem with this mod. But as always do so at your own risk.
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73 Mike WA2E @ K2DLJ
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bc760xlt.2
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cellular restoration
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restores 825-845 and 870-890 mhz on models manufactured during 1989
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(HI code date suffix) or later (bnc antenna connectors).
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1. with power cord disconnected, remove the four cover screws. remove the
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top cover only.
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2. locate the SANYO ic (printed upside down with the front of the
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radio facing you). a long row of solder pads just above the ic identifies
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pins 1-32 of the microprocessor. pin 1 is the left most pad and pin 32 is
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the right most pad. your mod will involve pins 19,20,26 and 27.
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3. using a sharp pointed tool, cut the two traces leading to pin 26.
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(both above and below).
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4. solder-bridge pins 26 and 27 together.
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5. solder-bridge one end of a 1/2" wire across the two vacant solder pads
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adjacent to pins 19 and 20 (short the pins). solder the other end of
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this wire to just opposite pin 26 (the other side of the cut trace and
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the solder bridge you installed in step 4.
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6. insert the power cord, turn the unit on, press MANUAL, 845., E; if
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845.000 appears, the mod was sucessful. Reassemble. If ERROR appears,
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recount the pins you modified and check the cut traces and solder
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bridges.
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Ref: see Monitoring Times 2/90 for more info.
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