Butterworth circuits come in both low- and high-pass versions, as well as ideal, Sallen-Key, emitter follower and DC accurate ...
The chip resistors combine power handling, high-frequency operation, and low parasitics for a range of applications.
If you’ve got a cheap ham rig, it might not be very practical for you to receive certain transmissions out of the box. However, if you were to hack in a convenient little beat frequency oscillator ...
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