Elenco Electronics K-35 Assembly And Instruction Manual
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Elenco Electronics K-35 Assembly And Instruction Manual

Elenco Electronics K-35 Assembly And Instruction Manual

Telephone bug kit
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TELEPHONE BUG KIT
MODEL K-35
Assembly and Instruction Manual
Elenco
Electronics, Inc.
TM
TM
Copyright © 2004, 1989 by Elenco
Electronics, Inc. All rights reserved.
Revised 2004
REV-J
753235
No part of this book shall be reproduced by any means; electronic, photocopying, or otherwise without written permission from the publisher.

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Summary of Contents for Elenco Electronics K-35

  • Page 1 TELEPHONE BUG KIT MODEL K-35 Assembly and Instruction Manual Elenco Electronics, Inc. Copyright © 2004, 1989 by Elenco Electronics, Inc. All rights reserved. Revised 2004 REV-J 753235 No part of this book shall be reproduced by any means; electronic, photocopying, or otherwise without written permission from the publisher.

  • Page 2: Parts List

    PARTS LIST If you are a student, and any parts are missing or damaged, please see instructor or bookstore. If you purchased this kit from a distributor, catalog, etc., please contact Elenco mail is at the back of this manual) for additional assistance, if needed. DO NOT contact your place of purchase as they will not be able to help you.

  • Page 3: Important Notice

    IDENTIFYING RESISTOR VALUES Use the following information as a guide in properly identifying the value of resistors. BAND 1 1st Digit Color Bands Black Multiplier Brown Tolerance Orange Yellow Green Blue Violet Gray White IDENTIFYING CAPACITOR VALUES Capacitors will be identified by their capacitance value in pF (picofarads), nF (nanofarads), or mF (microfarads). Most capacitors will have their actual value printed on them.

  • Page 4: The Antenna

    THE RF OSCILLATOR Figure 2 shows a simplified version of the oscillator circuit. The heart of the circuit is transistor Q1. It is biased into conduction by resistor R2. In the collector of the transistor is a tuned circuit consisting of inductor coil L1 and capacitors C2, C3 and C4.
  • Page 5 CONSTRUCTION Introduction The most important factor in assembling your K-35 Telephone Bug Kit is good soldering techniques. Using the proper soldering iron is of prime importance. recommended. The tip of the iron must be kept clean at all times and well tinned.
  • Page 6 ASSEMBLE COMPONENTS TO THE PC BOARD L1 - Coil (see Figure A) R2 - 270kW 5% 1/4W Resistor (red-violet-yellow-gold) (see Figure B) Q2 - MPSA56 Transistor (see Figure C) R1 - 47W 5% 1/4W Resistor (yellow-violet-black-gold) (see Figure B) GRY - Gray Wire (Strip 1/4” of insulation off of both ends.) GRN - Green Wire (Strip 1/4”...

  • Page 7: Installation

    Figure 4. You may have to cut the green wire and connect the K-35 green wire to the incoming line and connect the K-35 gray wire to the other cut green wire. If the connection is made properly, the telephone will operate normally.

  • Page 8: Schematic Diagram

    SCHEMATIC DIAGRAM QUIZ 1) The Telephone Bug is a small FM radio __________. 2) The main components of the Bug are the modulator, __________ oscillator, __________ amplifier, and antenna. 3) The RF oscillator frequencies for FM radio are between 88MHz and _____MHz. 4) An __________ circuit consisted of a coil and a capacitor connected together.

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