Restoration methodsCommon symptoms and remedies of noises in a old radio![]() Troubleshooting with noise other than the random type, we must however recognize the latter when it bears a relation to other troubles. One advantage in tracing noise problems or troubles is that most noises have a characteristic sound or sounds, which allow us to classify each type when we hear it. The type of sound gives a clue to its possible causes. These remedies are just some of the permanent fixes I have encountered.
Steady rushing noise over part, or all, of the tuning ranges, with traces of some signals through it.
Ruff or scratching distortion with considerable blocking on stronger stations.
Fuzzy Rattling and Buzzing with AF Signal.
Steady whistle heterodyne sweeps rapidly back and forth across desired signal during normal reception, or gradually lowers or raises in pitch and settles at one steady tone without any adjustments of the radio receiver. 1. Excessive radiation from interfering with a receiver, or two receivers using same antenna or antenna lead, or the other receivers oscillator is radiating a signal at a desired station frequency and is heterodyning with the desired stations signal in your receiver. Note: Unfortunately, it is not feasible to construct low-priced receivers in which oscillator radiation is so that nearby receivers cannot pick it up. Of course, and more elaborate receivers with RF amplifiers, radiation is negligible and this trouble is seldom experience. Add comment:
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