From ff79d3255359abf14af07dbb4f6bc50c6d823a9e Mon Sep 17 00:00:00 2001
From: Selene Corbineau <selene.corbineau@ens.fr>
Date: Tue, 10 Feb 2026 13:26:38 +0100
Subject: [PATCH] oops

---
 handbook.tex | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/handbook.tex b/handbook.tex
index b09cfd6..929d158 100644
--- a/handbook.tex
+++ b/handbook.tex
@@ -14,6 +14,8 @@
 \setlength\tabcolsep{0pt}
 \setlength\parindent{0pt}
 
+\newcounter{colw}
+\newcommand{\mc}[1]{\multicolumn{\thecolw}{l}{#1}}
 \title{Incomplete handbook of all things useful}
 \author{Sélène Corbineau}
 \begin{document}
@@ -86,6 +88,14 @@ With color rings, read with outermost ring to the right
 With digits: 2 digits + exponent. The base units are \unit{\ohm}, \unit{\micro\henry} and \unit{\pico\farad}.
 
 \paragraph{Preferred numbers}
+\begin{fulltab}{lcccccccccccc}
+\toprule
+\setcounter{colw}{2}
+E6 & \mc{1.0} & \mc{1.5} & \mc{2.2} & \mc{3.3} & \mc{4.7} & \mc{6.8}\\
+\setcounter{colw}{1}
+E12 & \mc{1.0} & \mc{1.2} \\
+\bottomrule
+\end{fulltab}
 % Recall E6/E12/E24
 
 \section{Common components}
@@ -123,6 +133,7 @@ TIP41,'42 & 80 & 6  & 15..75 @ 3 & 3\\
 \chapter{Telecommunications}
 \section{Amateur radio}
 \paragraph{HF frequency allocations (region I)}
+
 \paragraph{Q-code}
 \paragraph{Purity limits}