About

About MustardCapacitors.com

MustardCaps.com began as a late-night conversation among a small group of vintage-amp techs, radio tinkerers, and tone chasers who kept bumping into the same yellow capacitors inside every classic British circuit they repaired. Those Mullard “mustard” caps always measured spot-on after fifty-plus years, and the gear that used them never sounded quite the same with modern substitutes. We decided they deserved their own corner of the web.

Here you’ll find deep-dive articles on mustard-cap history, construction, and decoding, along with teardown galleries, lab tests, and real-world stories from studios and stages. We publish new pieces regularly and welcome guest posts, photos of rare finds, and honest debate about tone myths versus measurable facts.

MustardCaps.com is the editorial sister to ElectronicParts-Outlet.com, where we stock a full range of genuine NOS Mullard/Philips mustard capacitors and ship them anywhere on the planet. Sales of those parts fund the research, photography, and hosting behind this site, keeping the content free and the community growing.

Whether you’re restoring a Plexi, recapping a Neve module, or just curious how a polyester film roll became a legend, you’re in good company here. Read, comment, contribute—and keep the mustard magic alive.