Since we’re already looking back at Grote Reber and radioastronomy, we thought it would be fun to also take a look back — this time only about 10 years — to a circuit design by WØXI that combined elements of radio telescope technology with the work of another radio pioneer, Edwin Howard Armstrong, to create a very effective CW filter. This article first appeared in the November 2012 issue of CQ.
In college I had a professor who insisted that all of our projects include at least two disciplines. In one project on traveling waves he had us combine our efforts with a home-economics class. We had to assist the gals in producing a Baked Alaska and they had to assist us in measuring the time it took for the heat in the oven to reach through the meringue and cake and melt the ice-cream core. Multiple rewards followed this effort, as you can imagine. Ever since then I seem to automatically compare a project at hand with anything remotely related.
Soon after obtaining a new Yaesu FT-450D last year, which has a good receiver and DSP filtering, I found that the ever-present galactic and manmade noises on 40 meters still partially masked readable but weak CW signals. Having recently reviewed Grote Reber’s. First, however, who were Grote Reber and Edwin Armstrong?
