https://hp-8640b.pages.dev/posts/ Recent content in Posts on Hp 8640b https://tse1.mm.bing.net/th?q=hp%208640b https://tse1.mm.bing.net/th?q=hp%208640b Hugo -- 0.151.1 en Sat, 09 May 2026 00:00:00 +0000 https://hp-8640b.pages.dev/posts/hp-8640b/ Sat, 09 May 2026 00:00:00 +0000 https://hp-8640b.pages.dev/posts/hp-8640b/ I recently spent a whole afternoon tinkering with an old hp 8640b, and it reminded me why these machines are so legendary among RF hobbyists and engineers alike. Even though we live in an era of tiny, digital, USB-powered signal generators that can