Re: Circuit tracing - zener, or not zener?
A good excuse to keep that high range battery in use on AVOs etc.!- I suspect that they don't get used that often in the era of the ubiquitous DMM. A sensibly high impedance volt-meter connected across the diode in question will give at least an indication of turnover voltage, though the reading obtained is almost certain to be on the low side because of the very low test current. Some DMMs will turn over LEDs and low-voltage Zeners on their diode test range and give a voltage reading, but again the reading will be a little low for the same reason. Not sure if DMM manuals tend to give a "max test voltage out" on this range, must read more deeply (or read at all....),
Colin
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