Multimeter CAT Ratings: The 250 V Fuse Behind a CAT IV 600 V Label
Two multimeters on this page carry the same promise on the front panel — CAT III 1000 V, CAT IV 600 V — and…
Hot Air Station Airflow: 12 Stations, Six Different Units
Twelve hot air rework stations, straight from the manufacturers' own spec sheets: six different airflow conventions, one number that is not litres per minute, and the 2x correction nobody applies.
Your First Oscilloscope for Board Repair: What Actually Matters
Bandwidth, sample rate and the probe that quietly ruins your measurement - how to choose and use a first oscilloscope for board-level repair.
Choosing a Multimeter for Board Repair: Which Specs Actually Matter
Input impedance, burden voltage, counts and CAT ratings, decoded from two real published spec sheets — the multimeter numbers that decide whether a reading is true at a repair bench.