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45_MHz_TV_sound_channel_with_audio_output_stages

2014-11-10 08:03  
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45_MHz_TV_sound_channel_with_audio_output_stages
4.5 MHz TV sound channel with audio output stages. The ECG1047 has a three-stage differential amplifier for the IF amplifier section, a ratio detector and first and second audio amplifiers. The IF transformer, ratio detector coil and audio output transformer are standard and can be purchased at Radio Shack. This circuit provides 1.5 watts of audio power into an 8-ohm load (courtesy GTE Sylvania Incorporated).