I wish to avail myself of the knowledge here: My Dad, W5JHJ, has a WRL
Globe Champion 350 and is the original owner. He's maintained it and it
works well, but I wonder if a mod he made years ago was a good one. Like
most AM transmitters, it uses a choke-input PS design. I cannot recall the
input choke values, but do recall that it incorporates a swinging choke and
that the filter capacitor was originally quite small (2 uF, I think). that
capacitor failed some time ago, and as I was looking at his documentation
saw that he'd replaced it with something like 40 uF.
On the list, I recall scrolling across a few postings (now lost) that said
something about how these PS should be designed. There, I thought I saw
something along the lines of it being possible to have too much filter
capacitance. Did I get that right? If so, what's the symptom of too much
filter capacitance in a choke input filter?
Kim Elmore, N5OP
Kim Elmore, Ph.D.
University of Oklahoma
Cooperative Institute for Mesoscale Meteorological Studies
"All of weather is divided into three parts: Yes, No, and Maybe. The
greatest of these is Maybe" The original Latin appears to be garbled.
