Use and Construction of A Noise Sniffer

ANTENNA SNIFFER DESCRIPTION
An antenna sniffer, made from an old piece of antenna lead, can be used along with the vehicle's radio to locate "hot spots" which are generating radio noise interference. These "hot spots" can be found in the harnesses, in the upper part of the dash or even between the hood and windshield.

Antenna Sniffer:

The stripped back braided antenna shield, shown in the accompanying image, 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."

TO USE THE NOISE SNIFFER
1. While listening to the complaint noise, disconnect the antenna and plug the sniffer into the antenna socket. To use the Radio sniffer, turn the Radio on AM and select an appropriate station. To use the cassette sniffer, push "play." It will work on the same idea as a metal detector.

2. Turn the radio volume up.

3. Search for the noise source, keeping fingers off the 2 inch probe.

Checking For Noise On A Wire With Noise Sniffer:

Use Sniffer In Parallel
When checking for noise on a wire, the best results will be achieved when the sniffer is placed parallel to the wire. Refer to accompanying image.


CONSTRUCTION OF A HAND HELD NOISE "SNIFFER"
Refer to Service and Repair/Construction of a Noise "Sniffer" for the construction and assembly procedure.