Friday, November 14, 2014

Article Number: 9893






With most of the cable companies





scrambling their signals on most all





new and some old channels I thought I'd





update and revise my first version





(1.0) of Pay Tv Decoder Plans.





Due to different scrambling systems,





you might find it neccesary to change





the range and values of the variable





capacitator. I've also added a





wiring diagram to help you with design-





ing the circut. If you have any





questions just leave a message on the





board listed at the end of the article.









(Tom) Hackerman













///PAY TV DECODER PLANS///





Version 2.0













///MATERIALS REQUIRED:///











1 - Radio Shack mini-box ( #270-235)





1 - 1/4 watt resistor, 2.2k-2.4k ohm





(RS #271-1325)





1 - 75pf-100pf variable capacitor





(Very hard to find)





2 - F61a chassis-type coaxial





connectors (RS #278-212)





12" - No. 12 solid copper wire





12" - RG59 coaxial cable













///INSTRUCTIONS///









1. Bare a length of No. 12 gauge solid





copper wire and twist around a 3/8"





nail or rod to form a coil of 9 turns.





Elongate coil to a length of 1 1/2"





inches and form right angle bends on





each end.









2. Solder the varible capacitor to





the coil. It doesn't matter where you





solder it, it still does the same job.





The best place for it is in the center





with the adjustment screw facing upward









Note: When it comes time to place coil





in box, the coil must be insulated from





grounding. This can be done by crazy-





glueing a piece of rubber to the bottom





of the box, and securing the coil to it.









3. Tap coil at points 2 1/2 turns from





ends of coil and solder to coaxial





chassis connectors, bringing tap leads





through holes in chassis box. Use as





little wire as possible.









4. Solder resistor to center of coil





and ground other end of resistor to





chassis box, using solder lug and small





screw.









Diagram: Your circut and design should





look something like this:









----------------------------





! !





! !





! C !





! -----------F16a





G 2.2k O -- !





N----\/\/\--- Vc !





D 1/4w I -- !





! -----------F16a





! L !





! !





! !





----------------------------









5. Drill a 1/2" diameter hold in mini-





box cover to permit adjustment of the





variable capacitor from the outside.





Inspect the device for defects in





workmanship and place cover on mini-





box. Tighten securely.









6. Place device in line with existing





cable on either side of the coverter





box and connect to television set with





the short piece of RG59 coaxial cable.





Set television set to HBO channel.









7. Using a plastic screwdriver (non-





metallic), adjust the varible capacitor





until picture tunes in. Sit back,





relax, and enjoy!!!













Have fun...









(Tom) Hackerman









O S U N Y B B S





(914) 725 - 4060





_ _





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