Many members of the Cascades Amateur Radio Society meet for dinner each Friday evening at the Alpha Coney restaurant at the Jackson Crossing Mall. At these fun get-togethers, often there is show-and-tell. This last Friday (September 3, 2021) was no exception.
Mike (WB8ICN) brought some home-brew circuit cards that he had recently fabricated. This was of particular interest to the other amateurs at the dinner table.
Wes (N8QM) queried Mike why he used PCB copper-clad stock rather than proto-boards. Wes reasoned that proto-boards would be so much more quick and easy for breadboarding. Anyone could see that Mike had put a lot of work into building these breadboard circuits with very elaborate layout and much attention given to soldering. But Mike pointed out that proto-boards are heavily laden with parasitic capacitance. Upon consideration, this makes sense since there are many rows of tin underlayment within the protoboard. Each row has a slight gap. In that light, it becomes easy to see why there would be a very great buildup of parasitic capacitance making proto-boards bad candidates for circuits having frequencies anything much above a few mega-Hertz.
These Friday get-togethers provide memorable opportunities for amateur radio operators in the region to join in with the fun and fellowship that amateur radio provides.This is also an opportunity for newly licensed amateurs to get information and ideas from amateurs who have been practicing the hobby for upwards of decades.
Often, the amateur’s wives come along and have their own get-together at the restaurant dinner table.