Wenzel's circuits and projects are very high quality. Wenzel is a leading designer in field of ultra precise crystal oscillators (retired now, I think). His hobby instrument designs are mostly analog or mixed signal (with an occasional Microchip 8 pin processor) circa 1980's to 1990's style, but very reliable and relatively easy for a somewhat experienced electronics hobbyist to follow and build. He still does mostly through-hole designs (parts with leads), so you don't have to struggle with tiny SMT parts and toaster ovens.