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Thank you. This type of problem is less common in the Zener diode.

Voltage regulators and zeners are not the same thing. With a voltage regulator you might pass 1 amp through it, you don't do that with a zener. You don't draw your load current through the zener. You pass enough current through the zener (typically milliamps) to cause the diode to break down at the required breakdown voltage. The datasheet will tell you what the minimum amount of current is. The zener is a voltage reference *NOT* a voltage regulator.

OK, say you have a 10V supply, 5 ohm series resistors and a 5V Zener. That can supply 5V 1Amp to the load. If you take an amp, the resistor gets as hot as a voltage regulator but all the current is going into the load so the Zener isn't hot. BUT, if you remove the load, that amp now flows through the Zener. The resistor is still hot, and now so is the Zener! Far worse than a voltage regulator. Which is why you would design the Zener circuit to only supply say 10mA, and then use that to drive a transistor to boost the current (I'm simplifying). And that's a linear voltage regulator.

Voltage regulators are a better option in high power circuits. Zeners have poor regulation and the output current range is limited. Voltage regulators often need heatsinks.

Zener diodes are not perfect, as presented here. They have a slope and the voltage does change with input and load.

Actually, the Zener effect is a low voltage thing found in diodes with high doping levels; generally below 10V. Above that voltage the avalanche effect takes over. Anyway, no. You need a series regulator to regulate that way, and doing that with a high power device is spectacularly expensive. The governor should be economical enough to repair.

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Is it? Better than a signal detection diode? Does the fact it is a zener which is designed to breakdown at a specified reverse bias voltage, is that a desirable or essential property to have in signal detection/demodulation?

In series-connected circuits, their location does not matter. It can be that way.

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Agreed. I would not consider the parallel configuration a 1W Zener. It's a 0.5W Zener that keeps working if one Zener fails. Which is how they are used in safety applications.

Don't use zeners in parallel. I have never seen a circuit that does this. The devices would need to be perfectly matched. Use a bigger zener, they are cheap enough.

Thank you so much. You can turn off subtitles in video settings.

Thank you for the advice. 🙏🙏🙏

No, the series resistor determines the current. Without the resistor the diode would self destruct. This video is very simplistic.

Nope. They only allow a certain votage to exist across them (within limits) so can be used as a voltage clamp or reference.

No. The voltage regulation is not as good as a regulator chip. There is no thermal regulation and the voltage changes with load and input voltage. The current draw must be known to calculate the series restor because the zener has an operating range. A decent regulator has a vastly improved range over a zener.