Initial Inspection and Diagnostic Overview

CONSTRUCTION PROCEDURE
A noise sniffer can be built from either a personal AM/FM stereo cassette player or radio.

Antenna Sniffer:

Make the antenna sniffer as shown in the accompanying image. The 2 inch section, with the black coating and braided shield stripped back, becomes the antenna when the sniffer is plugged into the Radio's antenna socket. it can then be used to probe and search out "hot spots." Detailed instructions are listed below.

EQUIPMENT
^ Personal AM/FM stereo cassette tape player or radio with headphones
^ Four feet of 75 ohm antenna coax
^ One-half inch heat shrink tube the same diameter as the coax
^ A drill and bit the same diameter as the coax
^ Book of matches or hair dryer
^ Soldering iron and solder

INSTRUCTION FOR THE PERSONAL TYPE RADIO
1. Strip 1/4 inch off both ends of the coax.

2. Place the heat shrink over one end of the bare wire. Fasten the heat shrink to the wire by heating it (a match or a hair dryer).

3. Disassemble the radio and locate the antenna.

4. Disconnect the antenna and fasten the bare end of the coax to the antenna mount. A soldering iron may be needed.

5. Feed the coax to the exterior of the radio. Drill a feed hole if necessary.

6. Reassemble the radio.

USING A RADIO SNIFFER
To use the Radio sniffer, turn the Radio on AM and select an appropriate station. Refer to System Diagnosis/Using a Noise Sniffer for additional information. Use and Construction of A Noise Sniffer

INSTRUCTION FOR THE PERSONAL TYPE CASSETTE
1. Strip 1/4 inch off each end of coax.

2. Disassemble the cassette deck and locate the tape head.

3. Remove the head and mount one end of the coax to this point. A soldering iron may be needed.

4. Feed the coax to the exterior of the cassette deck. Drill a feed hole if it is needed.

5. Reassemble the cassette deck.

6. Feed the heat shrink tube through the other end of the coax. DO NOT FASTEN THE HEAT SHRINK.

7. Fasten the head to the open end of the coax. Use a soldering iron.

8. Cover the exposed wires between the head and the wire by positioning the heat shrink tube and heating it.

USING A CASSETTE PLAYER SNIFFER
To use the cassette sniffer, push "play." It will work on the same idea as a metal detector. Refer to System Diagnosis/Using a Noise Sniffer for additional information. Use and Construction of A Noise Sniffer