# Questions tagged [voltage]

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### Question about low voltage from mains for tube amplifier 811h

Edit: So I guess what i really want to know is more technical question regarding 572b tubes. What plate voltage is minimum to safely drive 572b tubes? what is lowest filament voltage to optimally ...
156 views

### Max voltage on antenna pin of Si4732?

I'd like to drive the antenna pin(s) of an Si4732 receiver chip with a device that isn't an antenna. I don't know what voltage to scale to, though, and don't want to fry the chip. The datasheet (or, ...
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207 views

### How low can a VCO step up and down frequencies?

So I am a hobbyist and I have in mind, a project I am working on and I need to sweep in a frequency range of 500 MHz with a step of 500Hz, and if my calculation is correct, this is equal to 1000000 ...
119 views

### Attaching a bulb to amplified coax cable will it light?

I am IT person not Ham operator and I guess it is difficult for you to understand me and my different thinking so this is a very simple question that will probably answer the dilemma at Coaxial cable ...
225 views

### Why measuring Voltage and Current becomes difficult at Microwave frequencies? Why measure Power?

I have been reading some Classic books viz. Techniques of Microwave Measurements - Carol Montgomery, Foundations of Microwave Engineering - Collins, and some other google searches and they all claim ...
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159 views

535 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 ...
4k 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 ...
• 103
12k 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 ...
930 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 ...
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