home *** CD-ROM | disk | FTP | other *** search
-
-
- +----------------------------+
- | Cable TV |
- | and The Black Art of Radio |
- | by Thomas Icom |
- +----------------------------+
-
- Chapter I:
- ----------
- Wireless Reception of Cable TV Signals
- a.k.a.
- How to Get Free Cable TV Legally
- ======================================
- Intro
-
- The difference between cable TV and regular TV can be seen in cable TV's
- "official" name, Community Antenna Television (CATV). Basically, with CATV,
- the cable company installs a TV antenna, and a satellite dish at a good
- receiving location somewhere (they call this place a "head-end"), and then
- re-transmits the TV signals over cable to customers' homes and businesses.
- CATV systems use frequencies between 108-400 Mhz. to send their extra
- channels through the system. The mid-band (channels 14-22) is between 108-174
- Mhz., super-band (23-36) is between 200-290 and hyper-band (37-53) is between
- 290-400 Mh. (These ranges are approximate.) To keep the CATV signals from
- interfering with the regular services on those frequencies. the cable company
- must keep leakage from their system down to an absolute minimum. This is
- easier said than done, and no matter how hard they try, CATV systems still
- leak to some extent, however minimal it may be.
- With equipment available from your local Radio Shack along with your TV,
- you can pick up low-level CATV signal leakage and get free CATV service
- without having to pay an installation fee or monthly service charges. This is
- all perfectly legal because you (currently) have the right to receive radio
- signals that come onto your domain, and in all reality the cable TV company
- shouldn't be letting these signals leak out of their system to begin with.
- When attempting this you should be aware that if your cable TV company is
- competent, you might not find an area in your neighborhood's outside plant
- that has enough leakage to get a good signal. Also, the way the government
- has been acting lately, one never knows when they might decide people who
- experiment with low-level RF signal reception are a threat to society. If
- such a thing does occur, make the necessary preparations before one of those
- UH-60 Blackhawks full of men with MP5SD3s lands on your lawn to bring you into
- "protective custody".
-
- How to Do It(!):
-
- Your wireless CATV reception station will need the following:
-
- - Fringe reception TV antenna
-
- - 10-20 db gain TV reception amplifier. Preferably one with an amplifier
- module that mounts near the antenna and a remote power supply. The two
- piece models offer better amplification as they amplify the signal before it
- gets noise from going through the coax.
-
- - Cable TV converter box
-
- - Cable descrambler for your system, if you want to receive "premium"
- channels (optional)
-
- - television (obviously)
-
- - Good quality RG-6 (or better) coax cable with connectors and 75-300 Ohm
- transformer if your TV doesn't have a 75 Ohm antenna input
-
- - TV antenna mast and other materials for mounting the antenna on your roof
-
- The system is put together as follows:
-
-
-
- ANTENNA
- |
- AMP
- | AMP CABLE
- +----POWER----CONV.---TV
- SUPPLY
- (If 2 pc. AMP)
-
- If your CATV descrambler is also a converter, then put it where the CABLE
- CONV. goes. If it is one of those types that descrambles channel 3 from a
- separate converter than hook it up in this fashion:
-
- CABLE
- ---CONV.---DESCRAMB----TV
-
-
- Once you have your system put together you have to find a leak to receive
- off of. The cable companies find leaks by driving down the road with a field
- strength meter. You can do this by walking under the cable and stopping where
- you see a peak on the meter. You can get a field strength meter for under $50
- at Radio Shack. However, unless you use a tuned field strength meter you will
- also register any strong RF source. If you have a portable TV such as a Sony
- Watchman, you can tune to a channel that you normally won't receive and walk
- around until you get reception.
- On a side note, many of those portable TVs that use an analog tuning dial
- (as opposed to a channel selector knob) often are able to receive mid-band
- cable channels without a converter box. (The Sony Watchman Model FD-10A can.)
- To check if your portable TV can do this, examine the TV's VHF (Ch. 2-13)
- tuning selector. The mid-band capable TV's have only 1 band for VHF
- selection. To get mid-band with these TV's, simply tune between channels 6
- and 7. You will also be able to pick up various types of voice commo from 88-
- 174 Mhz, although the selectivity and sensitivity on portable TV's suck for
- picking up narrow-band FM voice. You might fare better getting in some of the
- stronger FM broadcast stations on 88-108 though.
- When looking around for a good CATV leak, check under junction boxes
- where the main line is tapped to run cable drops to subscribers. They often
- degrade from being exposed to the elements. Also check around the homes of
- neighbors who you feel might have added extra CATV extensions to their houses
- wiring plant. If they have an antenna on their roof, then chances are they
- took the wiring plant that was hooked up to their antenna, and hooked it up to
- the cable system. The cable company generally uses good quality (expensive)
- materials when installing cable in someone's house. Most people when
- extending their system go to a department store or Radio Shack, and buy the
- cheapest (low quality) stuff they can find. This often leads to CATV leakage.
- Usually, the CATV company doesn't notice the leakage from a home unless it is
- really severe, as their detection equipment consists of a field strength meter
- and a 1/4 wave antenna. And since their readings are taken while going 40 MPH
- down a road, the signal from inside a house set back xxx feet from the road is
- usually not strong enough for them to take notice. You on the other hand, are
- using an antenna that has 100 times more gain than theirs, and are amplifying
- the signal your antenna picks up even more.
- Once you've found a leak, aim your antenna at it. You should then be
- receiving free cable TV. The reception may not be perfect, but what do you
- expect for nothing? To get better reception, try one or more of the
- following:
-
- 1. Position your antenna closer to the source of the leak
-
- 2. Use a higher gain (bigger) antenna
-
- 3. Use a more powerful amplifier
-
- If your leak still isn't adequate or you haven't found one at all, then
- use the following technique. Be careful with this one, as it will royally
- piss off the cable co., FCC, FBI, FAA, NSA, PUC, and your local chamber of
- commerce if you're cable co. happens to a member. Not to mention that if you
- get caught, you could be charged with vandalism, theft of services and
- possibly sedition. You'll need the following:
-
- - straight pin
-
- - 8-10 foot length of magnet wire (length not critical)
-
- - "liquid black tape", Newskin (liquid bandage), or similar spray-on
- insulator material
-
- - soldering iron and solder
-
- - crazy glue
-
- To start, solder one end of the length of magnet wire to the blunt end of
- the straight pin. Then apply the insulator material to the straight pin,
- except for the pointed end. Let the insulator dry. The insulation on the pin
- is the important part, as it is needed to prevent you from accidently shorting
- out your neighbors cable line.
-
- ---========================================
- | ^-solder here ^-magnet wire
- |<-apply insulating material
- |
- ^-leave tip clean
-
- When that's done take assembly and crazy glue over to your neighbor that
- has cable TV. Find a nice run of coax and push the pin in. Make sure the tip
- has good contact with the center conductor of the coax. Then unroll the
- magnet wire and crazy glue it to the coax in a way that it won't be
- noticeable.
- What you just did was add an antenna to your neighbors cable. You will
- now be able to enjoy the use of your wireless cable TV setup. The main
- problem with this setup is that the resulting "leak" will most assuredly be
- noticed by the cable co. who will come over and inspect everything. Your best
- bet is to install this device during the early evening and remove it the next
- morning before the repair crews hit the road. This way, it is less likely to
- be detected, unless your cable co.'s repair crews work at night.
-
-
-
- Chapter II:
- -----------
- How to Piss Off Your Cable Company
- and Give Your Neighbors Free Cable TV
- =====================================
-
- Radio Shack sells a device which will enable you to do just that. It
- will also let you use any standard TV for cable reception without having to
- purchase separate converters for each TV, or run coax.
- Go to R.S. and pick up a Model 15-1281 Cable TV Block Converter. This
- handy little device will take your mid and super band channels and convert
- them to UHF TV broadcast band frequencies. Hook it up to your cable system,
- and attach a good UHF TV antenna to the "TO UHF" f-connector.
-
-
-
- +-------------------+
- ! RS 15-1281 !
- ! !
- ! CABLE TO TO !
- ! IN VHF UHF !
- ! * * * !
- +---!------------!--+
- To Cable ! ! To UHF
- System------+ +------ Antenna
-
-
- It is important that you use a good high gain antenna or you will not get
- any range.
- What you are doing is taking the cable channels 14-36 and retransmitting
- them over the normal UHF TV channels. This way, any non-cable compatible TV
- can receive them. The range isn't too great though. Expect about 300 feet or
- so under ideal conditions. Antenna type, height, placement, and the receiver
- set-up will have a lot to do in determining your range. There's a lot of
- possibilities for the experimenter here. Optionally, you might also want to
- contemplate adding a small 1-5 watt amplifier to the UHF output (Get the info
- from The Motorola RF Devices Manual, available for free from Motorola. Call
- your local rep. for info.)
-
-
- The End
- =======
-
- If you have any questions, you can contact me on the following BBSes:
-
- Landfill - 914-HAK-VMBS
- Uncensored - 914-761-6877
- The Implosion - 914-762-6954
- Blitzkrieg - 502-499-8933 NUP: Columbian Coke
- Dark Shadows - 203-628-9660
-
- I'll be u/ling more updated info to these boards as I get it, as well as
- printing it in Cybertek: The Cyberpunk Technical Journal. For those of you
- who are unaware, Cybertek is a hardcopy newsletter which covers practical
- aspects of technology and survival. Get a photocopy from someone who has it,
- or get a subscription for $15 (6 issues) by writing to:
-
- Cybertek
- P.O. Box 64
- Brewster, NY 10509
-
- Disclaimer:
-
- Although this g-file is for educational purposes only and should not be
- construed as a suggestion to commit illegal acts; I have a feeling that the
- establishment doesn't give a shit about the bill of rights. That being the
- case, I suggest everyone follow standard C.Y.A. guidelines. Remember, freedom
- only exists for those who choose it.
-
- Please distribute this g-file (intact) by any means available.
- -Mr. Icom 7/18/92
- <EOF>
-