The guides are the main event, but they are not the whole of it.
Free RF calculators
A set of browser-based calculators for drive power, impedance matching, filter design and the rest of the arithmetic - free, no signup. Open the calculators
The build blog
Long-form writing on amplifier theory, troubleshooting and gear - the same research that feeds the volumes. Read the blog
The newsletter
Occasional email when something new is finished. No schedule to pad out, so it only goes when there is genuinely something to say, and one click gets you off it. Sign up
The Collector's Club
A membership for people who want the catalogue as it grows rather than one volume at a time, with a members-only channel. See the tiers
The main site
The full catalogue, including titles not carried on this store. hoodsfinds.com