106 lines
3.2 KiB
Plaintext
106 lines
3.2 KiB
Plaintext
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How To Build A Pink Box
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The function of a "Pink Box" is to ad hold button that allows music or
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anything else to be played into the telephone while the person is on
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hold. This Modification either be done right in the telephone as a
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separate box.
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Materials Needed
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1. Some Bell wire or Phone wire
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2. A SPST momentary switch RS # 275-1547
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3. 470 ohm resistor RS # 271-019
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4. 1 LED (Approx 5V) RS # 276-041
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5. An SCR, 2N5061 (Transistor)
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6. Audio Transformer (Ratio 10K:600)
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7. RCA phono Jack RS # 274-346
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8. Screw drivers, Soldering Irons, Ser, Etc.
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Construction
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1. Open the wall box and locate the RED & GREEN wires.
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2. Take a piece or RED wire and strip tend and attach it to the red lead
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on the wall box. Do the same for the GN.
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3. Connect the GREEN wire to the ANODE e of the LED.
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4. Connect the CATHODE side of the LED the UPPER pin of the primary side
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of the transformer. See diagram below.
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_____
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To one pole of phono ---! Top !--- To HODE of LED
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-!View !- Primary side
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To other phono pole ---!_____!--- To pole or trans. & one pole of
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switch.
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5. Connect the pin directly across format to one pole of the phono jack.
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6. Connect the RED wire to one side of resistor and to the "C pole" of
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the transistor.
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7. Connect the open pin of the switch the other side of the resistor and
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to the "G pole" of the transistor.
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Wiring Diameter
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RCA Jack X-former LED
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_____ C A
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Pole or Jack --/---! Top !---/--(*)--\------GREEN wire
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-!View !- Primary --I---RED wire
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Pole of Jack --/---!_____!---/-I (O)
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I I
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I [--I-----Pole of Switch
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I
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I--------/--m--Pole of Switch
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Key to Symbols
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-- Wire
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I Connection or wire
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/ Connection or wire
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_/ C pole of transistor --(*)--
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[_)-- G pole of transistor I
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I A pole of transistor (O) Resis
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I
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_____
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---! Top !---
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-! View!- Primary Transformer
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---!_____!---
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Use of the Pink Box
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Hook the RED and GREEN wires up to appropriate terminals and hook the
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RCA jack to the output on your stereo. Turn on your stereo at a good
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volume. Now call a friend. To test the Box, hold down the switch and
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hang up the phone. The LED should go and your friend should hear music,
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if not then start over. The hold is shut off if you pick up a phone on
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that line or your end hangs up.
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