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Questions tagged [voltage]

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3
votes
4answers
148 views

How is working on DC high voltages as in a tube radio different from 120VAC?

Suppose that I am familiar with the safety procedures for working on 20 A 120 VAC 60 Hz household lines. What should I be prepared for before working on high voltage DC circuits (say, 800 volts) as ...
2
votes
2answers
78 views

Voltage wave in transmission lines

The solution for the voltage in a transmission line can be written as: $$V(z) = V_o^+ e^{-jkz} + V_o^- e^{jkz}$$ The voltage $V(z)$ is the difference between the conductors of the line at a certain ...
3
votes
2answers
90 views

Determining whether signal meets the 12 dB SINAD voltage

The specification for a certain radio receiver says: Typically 12dB SINAD NBFM for 0.15uV at 145MHz. If I understand correctly, this means that the received radio wave should have a voltage level of ...
0
votes
2answers
2k views

How much voltage is on a typical high power (1000mw) 2.4Ghz WiFi antenna?

According to this sales listing for a 2.4Ghz antenna, it can handle up to 20 watts of power but has an impedance of 50 ohms. That means that (at 20 watts), the input would need to be at more than 50 ...
2
votes
1answer
8k views

Measuring RF voltages with a multimeter

Is it possible to measure RF voltages with a multimeter? I have a multimeter which can measure AC voltages up to 600V RMS, but I'm not sure because I don't know if it assumes the signal to be 50Hz, or ...
6
votes
2answers
699 views

Is there a digital multimeter that is more interesting for a ham than a run-of-the-mill model? [closed]

My 22-years old Fluke 79 died on me today... Luckily, it was a quiet dead, but nonetheless it left me a bit emotional... So, I am in urgent need of a replacement digital multimeter. This made me ...
3
votes
2answers
3k views

How to calculate the peak-to-peak voltage of a sine wave given RMS voltage

How do I calculate the peak-to-peak voltage of a sine wave given RMS voltage?