Add the telephone option Ma Bell doesn't make available on home telephones. Put any incoming call on hold with the push of a button. Red LED shows when party is still there. Easy to build and install. No battery necessary, takes its power directly from phone line.
PLANS ONLY KIT #2000POK . . . . . . . . . . . . . . . . . . . . . $1.00
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Uses an induction pick up coil amplifier and speaker to pick up and amplify telephone conversations. Great for hands free telephone operation or when you are put on hold. Plastic case included.
PLANS ONLY KIT #2001POK . . . . . . . . . . . . . . . . . . . . . $4.95
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With this device you can beat Ma Bell. With this device on your telephone, messages may be given between rings of the telephone. Tell people you are not home, when to call back, etc. Similar to an answering system except caller is not charged for the call because the phone is left on the hook.
PLANS ONLY KIT #2002POK . . . . . . . . . . . . . . . . . . . . . $9.95
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Limit those teenage telephone calls. This solid state device attaches to the telephone line. It emits a single warning tone at the end of 8 minutes of conversation and gives a continuous tone at the end of 10 minutes. The continuous tone prevents further conversation.
PLANS ONLY KIT #2003POK . . . . . . . . . . . . . . . . . . . . . $4.95
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#2005 DIALED DIGIT DISPLAY PLANS
PLANS ONLY KIT #2005POK . . . . . . . . . . . . . . . . . . . . . $4.95
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#2006 TELEPHONE "BLUE" BOX PLANS
Unscrupulous persons have used a telephone "blue" box to obtain free long distance telephone calls. These plans are presented for educational advancement only and any use for illegal purposes is strictly forbidden. These plans and/or PC board are for experimentation only and for no other purpose.
PLANS ONLY KIT #2006POK . . . . . . . . . . . . . . . . . . . . . $9.95
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#2007 TELEPHONE "RED" BOX PLANS
The "red" box is another telephone device that some dishonest people have used to obtain free telephone calls from pay phones. Just another example of experimenting with Tone Burst Generators. These plans and/or PC board are presented for educational purposes only and any use for illegal purposes is strictly forbidden.
PLANS ONLY KIT #2007POK . . . . . . . . . . . . . . . . . . . . . $9.95
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These plans show how to construct a push-button telephone dialer attachment using only 3 IC's; and which has the capacity to store 32 8-digit phone numbers. Numbers are automatically dialed by pushing only 2 buttons. The unit can be attached to any type of telephone: push-button or rotary dial. Options are shown for either tone or pulse output, and for LED display of the number being dialed. The unit also features one-button re-dial of the last number called. Compares to units costing over $100.00.
PLANS ONLY KIT #2008POK . . . . . . . . . . . . . . . . . . . . . $8.00 =================================================================
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