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HPAVC
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HBO.ZIP
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HBO.TXT
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1998-01-26
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58 lines
///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