17-03-2017, 04:46 PM
(17-03-2017, 04:26 PM)Nowhere-Man Wrote: There is this here:
http://www.radio-electronics.com/info/rf...inator.php
The subject comes up a lot on various forums.
That's a classic layout for the ratio detector, the two diodes shown in opposition (facing the opposite way) the Foster Seeley has the two diodes facing the same way as it were, also the Foster Seeley needs a limiter stage before it, that's in the form of an extra IF amplifier stage, the valve in that stage limits the amplitude of the signal fed into the discriminator by clipping the signal and thus removing any unwanted AM component from it such as interference.
Lawrence.
