These plans give you the details on how to modify two of the most popular radar detectors into radar jammers: the Cobra (c) RD-2110 Series Radar Detector and the Uniden (c) RD-22 Series Radar Detector. The reason these units have been chosen for modification is becuase they are very popular and very easy to come by. All radar detectors are modified to jammers in essentially the same way. Read through and understand the modification of the tow units below. You can then learn how to modify your particular type of radar detector (if different) in the "MODIFICATION OF OTHER RADAR UNITS" section below. Note: Don't worry about police detecting your radar jammer. It is common for a police radar unit to not be about to "lock" a radar signal on your car.
STUDY AND UNDERSTAND THE MODIFICATIONS PROCESS BEFORE BEGINNING! TAKE NOTES ON EXACTLY HOW UNITS ARE DISASSEMBLED. YOU WILL HAVE TO ASSEMBLE THEM.
COBRA (c) RD - 2110 SERIES
RADAR DETECTOR
1. Take apart the top and bottom cases by removing the bottom screws that hold the unit together. At this time, remove the printed information sticker. See figure A.
2. Flip the circuit board assembly so that the gold colored access cover faces up. Locate the five screws that hold the access and remove them. See figure A.
3. Now remove the access cover. Locate and remove the three remaining screws. See figure A.
4. Slowly and gently turn the whole assembly back over holding everything together as you do.
5. Locate the voltage regulator directly in front of the volume control. See figure B.
6. Remove the single screw holding the regulator in place. See Figure C.
7. Now slowly and gently pry the regulator back to a 45 degree angle. See figure C. 8. Slowly and gently turn the whole assembly back over holding everything together as you do.
9. Now free the board from the horn unit and put to the side for later use.
10. Locate and remove teh Mixer diode and lock washer from the horn assembly. See figure D.
11. Locate and remove the Receiver diode holder. It's right in front of the Mixer diode you just removed and has a small lock washer on top. See figure D.
12. Taking very careful not of the Mixer diode's correct position, slowly and gently remove the Mixer diode. See figure D.
13. Place this mixer diode to the side of your work area. Be sure to remember exactly where it came from . LABEL IT NOW! If you forget which diode goes where, you've just trashed a perfectly good radar detector.
14. Remove the receive diode in the same manner. LABEL IT NOW!
15. Locate and remove the screws holding the rear backing plate at the rear of the horn. Remove the plate and place to the side of your work area. See figure E.
16. Now flip the horn over so that screws show on top. With a small wrench, remove the two lock nuts located on the two screws at the small end of the air horn. Remove and label these screws then place them to the side of your work area.
17. At the other end of the unit, locate and remove the two small hex head screws. See figure F.
18. Flip the big end of the horn down on your work table. Using a 1/8 inch metal drill bit (carbide tipped bit is best), increase the size of the slot (also know as the "aperture") in the horn as shown in figures G and H. As a reference point, the aperture is located at the front of the Mixer diode. Place the drill bit at the very edge of the aperture. See figure G.
19. Drill one hole on each side of the aperture. Run the drill bit in and cut to smooth out any rough edges. You may also want ot use a small metal file. See figure H.
PROPER RE ASSEMBLY OF UNIT
1. Place the Mixer diode into its diode holder. See Figure I.
2. Holding the Mixer diode/diode holder assembly upright insert the diode holder back into the horn and turn the horn back over to keep it in place. See figure J.
3. Insert the Receive diode and diode holder keeping the flange side up. See Figure I.
4. Hold your finger over the installed Mixer diode keeping it in place.
5. Insert the Receiver diode and holder into the back into their opening in the same way. Make sure the lock washers are on the top of the diode holders. Flip the horn assembly back over keeping the diodes in their places. Replace the backing plate with two screws.
6. While securing the horn assembly with one hand, gently slide the circuit board back into it's original position.
7. Holding the horn and board together, install the one center screw into the horn from the backside of the board and install the two bigger screws at the back of the circuit board in like manner.
8. Replace the screw into the voltage regulator and replace the gold colored access cover and its associated five screws.
9. Replace the tuning screw and lock washer in the rear hole at the narrow end of the horn.
10. To make your unit road-ready, go to "SUPER TUNING YOUR RADAR JAMMER" below.
UNIDEN (c) RD - 22 SERIES
RADAR DETECTOR
1. Locate and remove the three screws found on the bottom of the case. Remove the circuit board horn assembly and place it to the side of your work area.
2. Locate and remove the volume control switch and city/hwy switch. Unscrew and remove the access cove.
3. Remove the single screw from the voltage regulator. Now remove the two remaining screws. See figure K.
4. Slowly and gently seperate the circuit board assembly from the horn assembly by lifting the board straight up away from the horn.
5. Keep the two lock washers on top of the mixer and receiver diode holders.
6. Remove the Mixer diode holder found at the small end of the horn by lifting it straight up away from the horn. Keep the Mixer diode with its holder and LABEL IT NOW! See figure K and M.
7. Remove the Receiver diode and its associated holder the same way. The Receiver diode looks identical to the Mixer diode. LABEL IT NOW! If you forget which diode goes where, you've just trashed a perfectly good radar detector. See Figures L and M.
8. Remove the tuning screw at the small end of the horn, label it and place to the side of work area. Remove all of the remaining screws. Don't forget the two at the bigger end of the horn. See N and O.
9. Locate and remove the fiber board unit at the small end of the horn assembly by removing its two holding screws. See figure M.
10. See figures O and P. Flip the big end of the horn down on your work table. Using a 1/8 inch metal drill bit (carbide tipped is best), increase the size of the slot (also know as the "aperture") in the horn as shown in figures P and Q. As a reference point, the aperture is located at the front of the Mixer diode. Place the drill bit at the very edge of the aperture. See figures P and Q.
11. Be very careful as the surface is easy to drill through. Drill one hole on each side of the aperture. Run the drill bit in and out to smooth out any rough edges. You may also want to use a small metal file. See figures P and Q.
PROPER RE ASSEMBLY OF UNIT
1. Replace the hex head tuning screw by turning the screw two full turns. See figure O above.
2. Press the Mixer diode into its associated holder (flange side up) making sure the lock washer is still on the diode holder. See figures R and S.
3. Holding the assembly upright, slide the horn assembly up and into position at the small end of the horn. Now turn the horn back over keeping the Mixer diode/holder in place. Note that the Mixer diode holder is longer in length than the Receiver diode holder. See figures R and S.
4. Holding the Mixer diode in place with your index finger, turn the assembly over and insert the Receiver diode and holder. See figure R and S.
5. Take the small fiber and wrap a 1 inch square of heavy duty aluminum foil over both sides of the board and return it to its original position at the small end of the horn. Secure the proper screws. See figure T.
6. Carefully replace the circuit board to its original position.
7. While holding the entire unit together, replace the two screws at the small end of the horn.
8. Replace the voltage regulator screw, the access cover and its associated screws.
9. Complete assembly and go to "SUPER TUNING YOUR RADAR JAMMER" below.
MODIFICATIONS OF OTHER RADAR UNITS
As stated previously, the modification procedure for all radar detectors to jammers is basically the same as they all basically have the same components. Turning any radar detector into a radar jammer consists of a few simple rules.
1. Label everything as you remove it.
2. Widen the aperture (on either side) with a 1/8 inch metal drill bit.
3. Super tune your unit with the step by step instructions found below. That's it!
SUPER TUNING YOUR RADAR JAMMER
Now you need to super tune your radar jammer for best possible performance. The easiest way you do this by using a standard radar detector. The radar detector will show you how strong a signal your jammer is sending. Almost all departments use either X orK band radar guns so this is the best way to tune your new jammer.
1. Obtain a multiple band receiving radar detector that also shows signal strength.
2. Place the radar detector between 100 and 400 feet away from you. It must be at least 100 feet away for you to super tune your new jammer. Make sure it's turned on.
3. Locate horn of the radar jammer and remove all screws except for the tuning screw on the back. Make sure your jammer is plugged in and turned on.
4. Slowly turn the screw clockwise. The radar detector will become activated. Once it does, make sure that it is detecting the X band. Keep turning the screw until you get maximum activation.
5. If the indicator on your detector completely tops out, you have it too close to the jammer. Move the detector further away from the jammer until the indicator is no longer topped out. Now tune your jammer until you get the strongest possible signal.
6. Once the tuning screw is set for maximum output, tighten the lock nut against the horn so that the screw can't move. Put a drop of Crazy Glue (c) or LotTite (c) brand adhesive on the nut and screw.
7. Return the board and the speaker back into the proper position. Now complete final assembly and reinstall all screws. That's it! You're done and road ready!!
IMPORTANT NOTES AND LEGAL INFORMATION
* Experiment with the city/hwy switch while super tuning your unit to get maximum output.
* Make sure your jammer is mounted as high as possible and has an unobstructed view of the road. Make sure no metal units are between the horn unit and the road.
* Radar jammer are legal in the United States, except in the states of Minnesota, Oklahoma and the District of Columbia. They are not legal anywhere in the Provinces of Canada.