Canoga Perkins Corporation Tunable Amplifier PR80A

Model PR80A Tunable Amplifier is used to locate cable trouble and identify pairs. Compatible with most popular tone generators, the PR80A enables craftsmen to tune to the exact frequency of the tone sent, facilitating tone identification. When the PR80A is tuned to the precise frequency of the tone, it virtually eliminates undesirable power noise – such as 60Hz power harmonics. In either probing or coiling operations, the PR80A can be tuned to signals in a frequency range of from 300 to approximately 1000Hz. Coarse and fine tuning is performed by simple knob adjustments. Precise tuning is critical because it enables the receiver to filter out unwanted signals that have a closely related frequency. Most tone generators have a nominal frequency rating that actually produces a signal with a ± 10% variance. As a result, these amplifiers receive a relatively wide fixed band of signals. This means that the entire bandwidth, containing both signal and noise, is amplified. The PR80A solves this problem by permitting exact tuning to the desired signal. It provides the flexibility necessary to match the generator while filtering out undesired signals.