I am new to electronics and am enjoying your website. On the "Meter Checking of Diodes" page, I couldn't make sense of meter testing of diodes with my analog volt/ohm meters. I found out that in both of my analog meters when in the ohms mode, they have opposite polarity to their meter leads colors (red is negative, black is positive), so they indicate diode polarity the opposite of actual diode polarity. My digital meters do indicate proper diode polarity, so I used them on the volt scale to measure the polarity of my analog meters when they are on the ohms scale and found this opposite analog meter polarity issue. It took me a while to figure this out, you might put in a note about analog meters ohms scales measuring with opposite polarity, if that is true for most/all analog VOMs.