Re: sunil case
开云体育Yes controlling the gain of the RF stages is a true “Automatic Gain Control” or AGC.? The audio based circuits are better called “Automatic Volume Control” circuits or AVC.?? AGC circuits are far superior because, if designed right, they will prevent ?the radio from over loading along the RF receive path that in turn causes clipping and distortion. ??AVC saves your ears… AGC saves the fidelity of the signal and your ears. ? ? From: [email protected] [mailto:[email protected]] On Behalf Of Wayne Leake ? ?Most, if not all, of the AGC circuits take their input from the high side of the volume control. ?Some control only audio, some control RF input from antenna. ?And the circuits I like control the gain of the fist IF amp, as well as the RF amp in some instances. ?I plane to use the circuit that control the first IF gain, and add another control to the first IF gain. In my case, it will be a BITX20. ?It also has an ouput for an S Meter, which can be an analog meter. ? ?Wayne WA2YNE ? -- …_. _._ |
MadRadioModder