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- ///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 minibox. Tighten securely.
-
- 6. Place device in line with existing cable on either side ofthe
- coverter box and connect to television set with the short pieceof
- 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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