On 8/2/2014 4:06 PM, James Wolf wrote:
It really doesn't matter how much power the amplifier is outputting. A simple explanation is that a sample of the output is inversely fed back and combined with the input. As was mentioned before, this method has been around for a long time. When you fly into an airport, the FAA radios that
What you described is "negative feedback". What PureSignal claims to do is described as "predistortion". Those are two different technologies, and along with a third technology, "feedforward", are neither new nor panaceas. I read the technical report on "Pure Signal" and it sounds like what we used to call a "hero experiment" in the research lab where I worked, consisting of a few impressive results, but with many disclaimers, and nothing you could productize. What is supposed to be new is the adaptive part, but it depends on the amplifier being "well behaved". Currently, merely getting a radio to interact with an amplifier via ALC is a debacle, so it is really hard to imagine radio manufacturers and amplifier manufacturers ever getting on the same page regarding predistortion. Rick N6RK _________________ Topband Reflector Archives - http://www.contesting.com/_topband
