114 lines
4.8 KiB
Plaintext
114 lines
4.8 KiB
Plaintext
SWITCHABLE EURO MOD FOR THE PRO-34
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By R.H. Gouin
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Micro General Corp.
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Norman, OK.
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The following Mod allows reception of both the 30mhz to 54mhz, and
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the 68mhz to 88mhz range on the Pro-34. As you know the srandard Euro mod cuts
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out the 30mhz to 54mhz range on the Pro-34. Now by adding a simple switch you
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switch or rather alternate between the 30-54 and 68-88 ranges on the Pro-34.
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PARTS LIST
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1 - RADIO SHACK SWITCH PART #275-624
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6 INCHES OF COMPUTER WIRE WRAP WIRE, ALSO OBTAINED AT RADIO SHACK.
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TOOLS
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ELEC DRILL
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DRILL BIT SIZE FOR SWITCH
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3 SIZE LARGER DRILL BIT TO DRILL PLASTIC CASE FOR SWITCH ACCESS HOLE.
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STEP 1
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DISASSEMBLE THE PRO-34 IN THE NORMAL MANNER AS TO PREFORM THE EURO AND 800MHZ
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MODS. (AS POINTED OUT IN THE PRO-34 MOD LISTING FILE FOUND ON THE RED ONION
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BBS 914-342-4585)
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STEP 2
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WHEN THE METAL CHASSIS IS FREE, DRILL A HOLE IN THE CHASSIS TO
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ALLOW INSTALLATION OF THE SWITCH. THE HOLE SHOULD BE LOCATED CENTERED BETWEEN
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THE ANTENNA AND SQUELCH CONTROL. THIS WILL LOOK LIKE A TIGHT FIT BUT IT WILL
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WORK. YOU WILL ALSO HAVE TO RE-ADJUST THE ANTENNA GROUND WITH NDLE NSE PLIERS
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YOU ALLOW ROOM FOR THE SWITCH BASE.
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STEP 3
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BEND THE LEAD TABS ON THE SWITCH BASE AWAY FROM EACH OTHER SO NOT TO TOUCH
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THE CIRCUT BOARD WHEN RE-ASSEMBLY IS PERFORMED.
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STEP 4
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INSTALL DIODE AT D9 LOCATION AS DIRECTED IN THE EURO-MOD EXCEPT !!! DO NOT !!!
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SOLDER THE LONG LEAD TO THE CIRCUT BOARD AS THE NORMAL MOD STATES.
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ONLY SOLDER THE SHORT LEAD OF THE DIODE TO THE CIRCUT BOARD IN IT'S NORMAL
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POSITION AS DIRECTED IN THE EURO MOD.
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STEP 5
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AT THIS POINT TAKE SOME OF THE WIRE WRAP WIRE, AND SOLDER ONE END TO THE LONG
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LEAD OF THE DIODE AT D9. MAKE THE SOLDER CONNECTION AS CLOSE TO THE DIODE
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BODY AS POSS.. NOW CLIP THE EXTRA LEAD OF THE DIODE OFF SO IT WILL NOT
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GROUND OUT OR TOUCH ANY OTHER COMPONETS.
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STEP 6
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NOW TAKE ANOTHER WIRE WRAP WIRE LEAD AND SOLDER THIS LEAD TO THE CIRCUT BOARD
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WHERE THE LONG LEAD OF DIODE D9 WAS ORIGINALLY INTENTED TO BE INSTALLED.
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NOTED: MAKE THE WIRE WRAP LEADS PLENTY LONG, TO BE TRIMED LATER AT THE SWITCH
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THIS WILL HELP KEEP TRAK OF THE LEADS DURING RE-ASSEMBLY.
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STEP 7
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NOW RE-ASSEMBLE THE UNIT TO THE POINT WHERE THE METAL CHASSIS IS BACK IN ITS
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PROPER POSITION WITH THE TWO WIRE WRAP LEADS ROUTED BETWEEN THE METAL CHASSIS
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AND TOP CIRCUT BOARD, AND BETWEEN THE ANTENNA AND SQUELCH CONTROL. IN OTHER
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WORDS HAVE THE WIRE WRAP LEADS IN THE AREA WHERE THE SWITCH WILL BE INSTALLED.
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STEP 8
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WITH THE SWITCH OUT OF THE MOUNTING HOLE THAT WAS DRILLED BEFORE, CLIP THE TWO
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WIRE WRAP LEADS AS SHORT AS POSS. AND SOLDER ONE ON EACH BENT OVER SWITCH POST.
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STEP 9
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NOW INSTALL THE SWITCH IN THE METAL CHASSIS MOUNTING HOLE.
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NOTE: YOU SHOULD REMOVE ALL BACKUP WASHERS AND NUTS ON THE NEW SWITCH, AND
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INSTALL THE SWITCH WITH ONLY ONE WASHER AND NUT ON THE TOP SIDE.
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STEP 10
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NOW TAKE DRILL BIT 3 SIZES LARGER AND DRILL A HOLE IN THE PLASTIC CASE
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BETWEEN THE ANTENNA HOLE AND THE SQUELCH CONTROL HOLE. THIS HOLE SHOULD BE
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JUST LARGE ENOUGH TO ACCOMODATE THE SWITCH WHEN RE-INSTALLING THE CASE COVER.
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IT SHOULD NOT BE LARGE ENOUGH WHERE IT WOULD CUT INTO EITHER FACTORY HOLES
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ON EITHER SIDE OF THIS LOCATION.
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STEP 11
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NOW RE-ASSEMBLE THE UNIT. THE NEW SWITCH SHOULD SLIDE TRU THE PLASTIC
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CASE JUST LIKE THE OTHER FACTORY SWITCHES AND ANTENNA BASE DO WHEN
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RE-ASSEMBLING THE CASE HALF.
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OPERATION
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THE OPERATION IS QUIET SIMPLE SWITCH ONE WAY AND YOU HAVE ACCESS TO ONE BAND,
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AT THE SECOND SWITCH POSITION YOU HAVE ACCESS TO THE OTHER BAND. YOU WILL
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HOWEVER HAVE TO TURN THE UNIT OFF THEN SWITCH BANDS THEN TURN THE UNIT BACK
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ON. THIS ALLOWS THE UNIT TO RESET ITS SELF FOR PROPER OPERATIONS. I HAVE
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ALSO NOTICED THE UNIT WILL NOT LET YOU PROGRAM 66.000, BUT WILL LET YOU START
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AT 68.000. YOU WILL ALSO NOTE SOME DIF. ACTIONS IN SEARCH MODE IN RELATION TO
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THE SEARCH PATTERNS OF 30-54 AND 68-88. IF YOU PREV. WERE SET SEARCH FROM
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68.000 LOW AND 88.000 HIGH THEN SWITCH TO 30-54 BAND, AND RESET SEARCH MODE
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LIMITS TO 30.000 LOW THEN PRESS TO PRGRAM THE HIGH LIMIT. YOU WILL NOTICE
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THAT 88.000 IS SET FOR THE HIGH LIMIT. JUST PRESS ENTER AND THE UNIT WILL
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SEARCH BOTH BANDS BOTH 30-54 AND THE 68-88. IT WILL ALSO LET YOU SAVE THE FREQ.
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OF THE EURO BAND IF YOU DO THIS WHILE SWITCHED TO THE 68-88 MODE, AND RECALL
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THEM WHEN SWICTHED TO THE 30-54 MODE AND VISA VERSA.
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ANY QUESTIONS OR FURTHER COMMENTS PLEASE WRITE ME. I AM ALWAYS INTERASTED
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IN OTHER MODS TO THE RADIO SHACK LINE OF SCANNERS, WITH PARTICULAR INTEREST
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IN THE PRO-2005, PRO-2006, AND PRO-34 LINE.
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THANK YOU
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SEND INQUIRIES, MODS, AND COMMENTS TO;
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R.H. GOUIN
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MICRO GENERAL CORP.
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P.O. BOX 5969
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NORMAN, OK 73070
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