PRE-1 and PRM-1
Among applications for a sensitive detector is naturally to locate electromagnetic radiation. This may be radio (TV) interference from utilities or it may be searching a room, furniture, equipment or persons for hidden transmitters. It will even find a hidden tape recorder if it has a bias oscillator. Most do. LogProbe is a strong performer and a natural choice for each of these applications!
Interfering appliances, like coffee grinders, fax machines, computer monitors are easily identifiable. Turn them off and the interference goes away! To do something about it is more difficult. The interference usually covers a wide range of frequencies. The nature of the interference in the near field is usually dominant as either electrostatic or electromagnetic. For this reason LogProbe has two basic kinds of probes available. As a subgroup there are three magnetic probes due to the difficulty to cover frequencies from the high audio range to above 500 MHz with any one coil.
The magnetic probes are of course a loop, or a coil, shielded from electric fields. The electrostatic probe is a tip, insensitive to magnetic fields.
The near field of hidden radio transmitters may be either electrostatic or magnetic in nature. It depends upon the antenna used. The magnetic probes maybe a good first guess for a scan. If other signals, like cellular phones in the same or nearby rooms, are operating it will make the search more difficult due to the increased base level on the output signal. When one come closer to a hidden transmitter there will be no doubt, though.
Telephones and table lamps can be scanned along their cords as well, since it may be the antenna of a hidden transmitter.
Verifying the operation of an antenna can be done in several ways with LogProbe.
For mail or orders, please contact us at
carl@logprobe.com