An item of interest for readers: For $1. 50
    busines ses and schools are equipping them -
    selves with ~dial -lock", which f ~t s ir~to
    the "1~ position on a dial phone, which
    eliminates calls except from dial-lock
    key holders.(For pushbi~t~on phones, a
    steel plate covers the buttons-Ed. )
    For every piggy action, there is an equal
    and opposite people reac~ ion. Simply lift
    the receiver and rap~ dly push the buttons
    on the cradle equal to the numbers you
    would dial. For example, to dial 936-2323
    you would push the b~ttons down( or ~ust
    one of them) 9 times, 3 times' 6 times,
    etc., about as fast as a watch ticks, with
    a second or so between each d~git. Keep
    ~onnt, cause its easy to lose count. Or,
    ~,ush the button 10 times, and you cen
    -ive the operator the number you want,
    wnether its around the co~ner or across
    the country. She is well-trained to as-
    s~st you most ably. The "d~al-lock ads
    are right, the phone bill ~s effectively
    reduced, but it doean't sey whose. L.W.,
    Houston, Texas .
    
    Dear YIPL,
    If any YIPL reader has access to info
    on a pig device called a curdler please
    publish the description of the resona-
    tor tubes. This device is developed
    in France [or use on rloters. Basically
    it is a tone generator, ~mpllfier, and
    a hi-fi type exponential horn tweeter
    fitted with resonator tubes. Supposedly
    even a hand-held model cen cause ear
    dam~ge and brsin hemmorag~ng through
    a sort of "sound laser" effect. Come
    the revolution sympathet~c stereos can
    be turned ageinst the pig. CCS. Yippie!
    The Credit Card Computer we reported
    to you about is not yet available to
    all operators . So ~n some areas, the
    old system of simply matching the
    4th digit to the letter st~11 works.
    I`'e 've also heard that on the '~fest
    Coast, the computor is off from 2-4
    a.m. for checking, and cred~t card
    cal ls dur~ng that time are ass~med
    to be valid. The same thing ~s true
    in other areas ~ but we don't know the
    times. They m~y be the same.
    
                       ~L
    
                    READERS
    
    ~ _
    
    Dear Yipl,
    Please distribute this little gem of info inmed-
    iately- "The National Security Agency monitors
    and records every trans-Atlantic telephone call.
    Source- Ramparts Aug. '72. Also- "Of course,
    all trans-Atlantic and trans-Pacific Telephone
    ca~ s to or from the U.S. are tspped. r
    
    I don't know if the NSA would pass info on to
    the FBI about phone phreaks, bot its certainly
    conceivable that they may.
    
    It seems m is pushing Astrofood to school
    kids through a subsidiary, Continental Baking.
    I think we need to find out j~st how much ITT
    controls. If I get the time I'll go to MLPFœFs
    and check Standard ~ Poars to see if I cen get
    the scope of operations of this glant. J.R.,
    Atlanta, Ga.
    
    Dear YIPL,
    Just a note to g~ve you a few comments on the
    August issue(No. 12).
    
    First, the Red Box: you m~ght note that it
    is also important to provide a contact and make
    the line connections which will gronnd the tip
    side of the line when you beep the box. When a
    coin is placed in a psy phone, the mechanism
    grounds the tip side for about 1 second; this
    is what gets you dial tone on a so-called pre-
    pay phone. Then, when dealing with the operator
    for longer calls, the beeps tell her that you've
    paid, but it will look a little funny if the
    equiptment doesn't register the dropping of coins
    Both are necessary for a realistic simulation.
    
    ~ 1” 1
    _"
    
        I  ~
    
    FICHT BRtN! NO.13
    
    SEPT.-OCT.72
    
           THE rau r~ INF~R NA,IONA L
    
                 PA RT r L INE
    
    (The terms "tip~ and ~ring~(a~so uslesve")
    come from the old manual switchboard days and
    describe the connections on a cord plug. These
    archaic terms are still used taday: the tip
    side is the green wire and L1 if things are
    hooRed up properly; the ring side of the line
    is the red wire and L2.)
    
    Second: ~ have constructed several Blne Boxes
    using the Signetics NE 566 IC. I do not recom-
    mend it for several reasons: 1. It is designed

    





    to be a voltage-controlled oseillator and is
    very good in this role. It is so damned voltage
    sensitive that it needs a very stable, rock
    solid bettery supply. Even-~;~h a zener regalator
    after the bettery, which is getting rather silly,
    it is no good because of 2. ~ts temperature sens-
    itivity. using mylar caps and metOal-film rOsistors
    I got an 8X var~ation between 35 F. and 90 F.,
    which means you have to re-tune the tt.1ng all the
    time. Finally, diode variations lead to unreal
    differences between tones that should be the
    same frequency. Best Wishes, T.V., Calif.
    
    ~1 1 ~
    
                     1~ ~Q
    
    k~p h touch wffl yo~ h~ and fri~ÄSl~ ~em
    a call lar~t