A white-noise source can be constructed based on the random noise of a Zener diode or reverse-biased base-emitter junction. While these circuits work, they are temperature sensitive and not ...
This audio noise filter circuit is a bandpass filter for audio frequency band. It filters unwanted signals that are lower or higher than the audio frequencies. It has 2 filters: a low pass filter and ...
Most universal radio receivers have a very wide bandwidth that is not particulary for radio amateurs. The better models with narrower bandwith are almost always priced higher, too high for the reach ...
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