As for a tone dialer, don't leave home without one! A true phreak always
has a DTMF tone dialer at hand along with a red box! My personal favorite is
the COMBO-BOX (red box plus DTMF). Take a Radio Shack 33-memory Pocket Dialer.
Open up the back. Remove the little 3.579 MHz crystal (looks like a metal
cylinder). Unsolder it. Solder on a couple of thin, insulated wires where the
crystal was attached. Thread the wires through one of the "vents" in the back
of the tone dialer. Get ahold of a 6.5536 MHz crystal (available thru Fry's
Electronics, 89 cents apiece, phone number (415) 770-3763). Go out and get
some quick drying epoxy and a Radio Shack mini Toggle Switch. DPDT, cat. #275-
626. Close the tone dialer, with the two wires sticking out one of the back
vents. Screw it up tight. Now, attach the crystals and wires to the switch
with solder as in the diagram below:

             |^^^^^|
                                      |    xx  <3.579 crystal> small one
                                      |    |
             toggle switch ->       oooooooX     xxxxs <two wires>
                                      |    |
                                      |    xx   <6.5536 crystal> big one
                                      |    |
                                       ^^^^^

    Each "xx" prong in the diagram is actually two prongs. Hook up the two
leads from the crystals to separate prongs (same with the wires).

    Now, epoxy this gizmo to the side of the tone dialer. Use a lot of epoxy,
as you must make the switch/crystals essentially embedded in epoxy resin, as
in the diagram below:

Front view ->      _________________________
                   |                       |T <-toggle switch
                   |     oo    oo    oo    |---
                   |                       |  |
                   |                       |---
                   |     1     2     3     |Bs <-two crystals (B=big,s=small)
                   |                       |  |    in epoxy "blob"
                   |     4     5     6     |--
                   |                       |
                   |     7     8     9     | ^two wires running to back of unit
                   |                       |
                   |     *     0     #     |
                   |                       |
                   -------------------------


                   _________________________
 Back view ->      |                       |
                 T | o         ----- o-----------------------vent (1 of 4)
                ---|         /        \    |
               |   |        |       --------------------speaker
                 ---|       |         |    |
                  sB|       |         |    |
  2 wires ->       \------o   ----    o    |
  running into     |                       |
  vent             |                       |
                   |                       |
                   |                       |
                   |                       |
                   -------------------------


    Make sure the epoxy is really gobbed on there. You want to be certain the
switch and crystals are firmly attached and secure in a matrix of epoxy (it
doesn't concduct electricity, so don't worry about shorting out the
connections to the toggle switch). Just don't gum up the action of the switch!

    Basically, you've altered the device so you can select between two crystals
to generate the timing for the microprocessor in the tone dialer.

    Turn on the tone dialer. Now you can easily switch between the two crystal
types. The small crystal will generate ordinary DTMF tones. By simply flicking
the switch, you generate higher tones, using the memory function of the tone
dialer, save five stars in the P1 location. Now dial the P1 location using the
big crystal. Sure sounds like the tones for a quarter, dowsn't it?

    Carrying this around with you will always come in handy with both telco
payphones and COCOTs! No phreak should be without one!

    References for this article include Noah Clayton's excellent piece on
COCOTs in 2600 Magazine, Autumn 1990. Also The Plague's articlt, on Tone
Dialer conversion to Red Box, 2600 Magazine, Summer 1990 (which inspired me to
create the COMBO-BOX (red box plus DTMF dialer).

    Information is power... share it And drink massive amounts of Jolt Cola.
Trust me, it's good for you. Keep the faith, and never stop searching for new
frontiers.