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Showing posts with label Broadcast. Show all posts
Showing posts with label Broadcast. Show all posts
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30W VHF FM Broadcast Amplifier

The 30 watt amplifier circuit shown below provides an appropriate power boost with an input of 4 watt up to 6 watts. The circuit is designed to cover 88-108MHz FM Broadcast Band. However, the circuit is very stable at my place and provides a clean-output through seven (7) element Butter-worth low-pass filter.The heart of the circuit is 2SC1946A VHF RF power transistor. The transistor is
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80W Broadcast FM Stereo Transmitter

80W Broadcast FM Stereo Transmitter SchematicThe two single-ended line level audio signals enter through feedthrough capacitors, and are greeted by a low pass LC filter to get rid of any RF that might be on them. In each channel there is a buffer stage, and then a combination of pre-emphasis and soft-limiting step. The advantage of limiting and pre-emphasis in one step is to avoid heavy
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