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- )( How To Listen In On Cordless Telephone Conversations )(
- )( )(
- )( An Original 'Phile' By: Beowulf )(
- )( )(
- )( Call The Outhouse BBS 201-756-9575 )(
- )( )(
- )()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()(
-
- Have you ever wanted to know what your brother/sister/parents/
- friends/enemies were saying as they hid somewhere, cordless phone in hand?
- With this phile, now you can! Just follow the simple instructions outlined
- inside.
-
- First some information about cordless telephones:
-
- The original cordless telephones (1978-about late 1983) were made
- to be used on the 1.6 to 1.8 MHz band. If you will notice, 1.6 MHz is also
- the top end of the AM broadcast band. These phones operate on AM (just like
- the radio stations) and use the wiring in your house for an antenna. The
- power of these phones is 1/10 of a watt in most cases, or about 1/50th of the
- power that your average CB radio will put out. So, not having a lot of power,
- it is tough to hear these phones. You know how they say '500 foot range'?
- Sure, that's the range of the handset to the base, but not of the signals
- emitted by the base! Which means that on good nights you can hear them for
- many miles (I live in NJ an have heard telephones VERY loudly from NY City,
- 35 MILES away!).
-
- The newer phones, however, are not as easy to hear. They operate
- on FM on the 49 MHz band, which is the same frequency which your little
- walkie-talkies that you loved as a ten year old operate on. These phones
- require a little bit more effort to be heard than do the old ones (and a
- little $$$). Never fear, however, because about 1 out of 10 phones is the
- old style, and they are still being made and sold today.
-
- How To Do It:
-
- For the old style phones, you will need to get a pocket size AM
- transistor radio. The one I used was an AM/FM Realistic (bought for $9 at
- Radio Shack). There should be a small plastic box inside the radio. This
- little 'box' is the VFO (Variable Frequency Oscillator) which controlls the
- frequency of the radio. Now of course, you aren't going to have a digital
- frequency counter (they only cost $400, so everyone should have at least
- two of them) so before you do anything, turn on the radio and tune to the
- top of the band and find the station which is closest to the top of the
- broadcast band. Write down the frequency so you have something to compare
- to later.
-
- Now, turn off the radio, get a small size screwdriver, and
- adjust the small screw(s) on the back of the little plastic box. Don't turn
- them more than a quarter turn at a time. Now, when you have done your first
- 'tweak' of the screws, turn on the radio and see where that station at the
- top of the band is now on the frequency dial. When you have gotten the
- station 150-200 kHz down from where it was, (like if the frequency was 1600,
- get it down between 1400 and 1450), you are all set to recieve cordless
- telephones at the top end of the radio! Note: this little 'trick' may not
- work as well on all radios, but it is worth a try. If worse comes to worse,
- you can turn them back.
-
- The ideal distance is a close to the base as you can get, but this
- sucker should pull in signals from up to 500 feet away with no problem.
- Simply go near someones house with this, and then have fun!
-
- Another way: Another way to do this, if the VFO adjustment trick
- does'nt work, is to adjust the small metal boxes that have little colored
- screws in them. These are the tuning coils for the reciever circuit, and they
- affect the frequency also. Another possibility is a combination of turning
- the VFO screws and the coils to try to get the desired effect. Good Luck!
-
- Now for the tough ones, the new phones. The new phones work on the
- 49 MHz band. You are going to need one of the 'new' walkie talkies that
- operate on 49 MHz ===- FM -=== (the cheap shit ones are AM). If you
- decide to invest in one at Radio Shack or similar store, make damn sure you
- get FM walkie talkies. If you get AM, you're screwed, unless you have a
- friend who is killer into electronics or ham radio who has the knowledge to
- convert AM to FM. (Yes, it can be done. I have done it with CB's, and it is
- great for CB because no one can understand what you are saying unless they
- have a FM-converted CB.....Hmm.....that may be my next text phile...look for
- it!!) Anyway.....when you get your FM walkie talkie, you can do one of two
- things:
-
- A) You can play the adjust the coils trick as mentioned in the last
- article (there is no VFO because walkie talkies are crystal
- controlled).
- B) You can change the crystal. Popular frequencies for cordless
- phones are 49.830, 49.860 and 49.890 MHz. These crystals can
- be obtained from electronic supply houses (like ones that sell
- chips for your Apple) for about $2 or less each.
-
- And that just about concludes this phile. There are two other
- shortcut methods that can be used to bypass this mess and get you listening
- in right away.
-
- 1) Get a general coverage receiver. They cover all frequencies
- from 100 kHz to 30 MHz, and will provide you with 'armchair'
- reception because you can hook up a monster antenna. (I have
- a 1964 vintage model that I got for $10 sitting on my desk
- with a 600 foot long piece of wire for an antenna....boy,
- I know everything in my neighborhood before the ladies start
- gossiping!)
- 2) If you play guitar or bass, and have a 'wireless' system for
- your guitar like the Nagy 49R, you can hook up a 12 volt
- lantern battery and go prowling around listening for the
- phones. (Bass rules!)
-
- Method 1 only works on the old phones because of the frequency
- limitations of the reciever, and method 2 is for new phones only because
- the 'wireless' systems only work on 49 MHz FM.
-
- Have phun with your new knowledge, and look for more philes
- from me in the future (that CB FM is a good idea.....hmmmm...)
-
-
- )()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()(
- )( This has been on original phile by: Beowulf )(
- )( Copyright June 1985 This file is for use on AE, Catsend, and )(
- )( AE/BBS's only. )(
- )( Call The Outhouse BBS 201-756-9575 24 hours a day! )(
- )()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()()(
-
- Jimi Hendrix lives on!
-