Questions tagged [voltage]
The voltage tag has no usage guidance.
9
questions
1
vote
1answer
77 views
Crystal Oscillator Output Impedance and Output Voltage
I am working on a project designing a 40 MHz radio transmitter, but I need some clarifications. I need to know how to calculate its output impedance.
I know how to calculate common collector's output ...
1
vote
1answer
71 views
Power supply for shortwave portables
I have the Tecsun PL-310ET and PL-660 SW portables which are spec’d for 5V and 6V power sources respectively. Would it damage them if I tried to power them with a 9V Bioenno battery (actual steady ...
3
votes
4answers
178 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
103 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
219 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
3k 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 ...
3
votes
1answer
10k 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
818 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
5k 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?
