65 lines
2.0 KiB
Plaintext
65 lines
2.0 KiB
Plaintext
///PAY TV DECODER PLANS///
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MATERIALS REQUIRED:
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1 - Radio Shack mini-box ( #270-235)
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1 - 1/4 watt resistor, 2.2k-2.4k ohm
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(RS #271-1325)
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1 - 75pf-100pf variable capacitor
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(Hard to find)
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2 - F61a chassis-type coaxial
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connectors (RS #278-212)
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12" - No. 12 solid copper wire
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12" - RG59 coaxial cable
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///INSTRUCTIONS///
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1. Bare a length of No. 12 gauge solid
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copper wire and twist around a 3/8"
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nail or rod to form a coil of 9 turns.
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Elongate coil to a length of 1 1/2"
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inches and form right angle bends on
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each end.
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2. Solder the varible capacitor to
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the coil. It doesn't matter where you
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solder it, it still does the same job.
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The best place for it is in the center
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with the adjustment screw facing upward
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Note: When it comes time to place coil
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in box, the coil must be insulated from
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grounding. This can be done by crazy-
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glueing a piece of rubber to the bottom
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of the box, and securing the coil to it.
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3. Tap coil at points 2 1/2 turns from
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ends of coil and solder to coaxial
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chassis connectors, bringing tap leads
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through holes in chassis box. Use as
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little wire as possible.
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4. Solder resistor to center of coil
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and ground other end of resistor to
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chassis box, using solder lug and small
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screw.
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5. Drill a 1/2" diameter hold in mini-
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box cover to permit adjustment of the
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variable capacitor from the outside.
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Inspect the device for defects in
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workmanship and place cover on mini-
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box. Tighten securely.
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6. Place device in line with existing
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cable on either side of the coverter
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box and connect to television set with
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the short piece of RG59 coaxial cable.
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Set television set to HBO channel.
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7. Using a plastic screwdriver (non-matalic)
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adjust the varible capacitor until picture
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tunes in. Sit back, relax, and enjoy!!!
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