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- ///PAY TV DECODER PLANS///
-
- 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 (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.
-
- 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-metalic) adjust the varible
- capacitor until picture tunes in. Sit back, relax, and enjoy!!!
-
- 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
- designing the circut. If you have any questions just leave
- a message on the board listed at the end of the article.
-
- (Tom) Hackerman
-