Considering just electrical properties, the most significant parameter for your selection of antenna conductor is resistance. You want to keep the resistance to a minimum, because when current flows ...

Isn't bureaucracy wonderful? Perhaps I can translate into plain English: Your application is in a dismissal status effective 03/09/2021 without prejudice in accordance with Section 1.934 of the ...

Well, the canonical answer is that the balun converts the dipole (BAlanced) to coax (UNbalanced). But what does that mean? For transmission lines (twin-lead or coax) to not radiate, each conductor ...

HF propagation over long distances is by skywave propagation, the reflection and refraction of radio waves between Earth's surface and the ionosphere. The ionosphere is a consequence of radiation from ...

"Balun" is a portmanteau of "balanced" and "unbalanced". Anything made to interconnect a balanced and unbalanced load can be called a balun. A common-mode choke (like a ...

Bad etiquette and illegal. Bad etiquette because anyone else scanning the repeater will hear your useless silence, and illegal by §97.119: §97.119 Station identification. (a) Each amateur station, ...

Mathematically yes, the value of that equation increases with frequency. However, that's not to say there's some physical mechanism for frequency-dependent attenuation in free space. Rather, the ...

There's a lot that can be said about lightning protection, but it usually boils down to doing all of these things: make good, low impedance connections to Earth bond all Earth connections together ...

Clearly capacitance is the key Capacitance is just one part of it. The gamma match in your question is three things: A sort of folded dipole, performing an impedance step-up A parallel shorted ...

An ideal vertical doesn't have radials: it's half a dipole sitting upon a perfectly conductive, infinite plane. Under these idealized conditions, its radiation pattern is identical to a dipole's ...

Receive antennas are the easiest thing ever. You just need two things: something that conducts electricity another thing that conducts electricity Attach one to the center contact on a BNC connector....

A cavity filter is inductors and capacitors. Something like this: (from amateur-radio-wiki.net) There are several reasons these are not constructed from more common discrete inductors and capacitors....

The bits per sample will affect the dynamic range of your receiver. There's a lot of math that I'm sure you can find, but here's the intuitive explanation: A digital signal can represent only ...

First, I'd be sure it's actually the antenna picking up the noise, and not something else. If you don't have a balun on that dipole, probably your feedline is picking up all the noise in your house. ...

A dipole is a particular machine for creating EM fields. The idea is to set up a voltage between the two halves of the dipole in such a way that an EM field is created and efficiently radiated away. ...

What do you mean by "circuit"? Do you mean there's a loop of conductor from one side of a battery to the other, possibly with some other conducting components along the way? How about this circuit? ...

Some types of noise are very short bursts of energy. Car ignition noise is one example. Power-line noise caused by switching triacs in light dimmers is another. For example, see the top image here: (...

The answer is simple: filtering. For example, let's say the desired signal is at 800 MHz, and the intermediate frequency (IF) is chosen to be 100 MHz. Mixing the 800 MHz signal with a 900 MHz local ...

One way to tell is by its effects. Do you hear a garbled version of yourself in nearby speakers when you transmit SSB? Do GFCI outlets pop even though no one is being electrocuted? Does handling the ...

Google defines "linear" as "arranged in or extending along a straight or nearly straight line." Wikipedia tells me that "linearity refers to a function or relationship which can be graphically ...

With the information you've provided, there is no way to tell. Feedpoint impedance and VSWR have no relationship to antenna efficiency. See What is the relationship between SWR and receive performance?...

You may be surprised to hear this, but the antenna you describe isn't actually a vertical, but a dipole. One half of the dipole is the IMax-2000, and the other half is your feedline. You can not ...

Simplified answer: There is no relationship between SWR and receive performance. There is one condition for this simplification to be true: the received RF noise floor must be above your receiver's ...

I'm going to assume we are discussing ideal, resonant dipoles. Consider what's happening inside the dipole. Say you are transmitting a carrier. Say at one point in this carrier's cycle, the voltage ...

We use decibels because they are the most intuitive representation when our primary concern is signal quality. Signal quality changes not in proportion to the power added (in watts), but rather to the ...

In the absence of common-mode currents, then the optimum feedline length is 0, because a longer feedline only increases your feedline losses. These losses are due to the resistance of the wire, ...

As Wikipedia puts it: The name of the hobby comes from DX, telegraphic shorthand for "distance" or "distant". There is no objective definition. If it's far enough that it might be a difficult ...

Sure, it would work. In fact, if you've ever used something implementing some digital mode that interfaces with an SSB tranciever, this is exactly what is happening. Many TNCs and most PSK-31 software ...

You might be able to detect a regenerative receiver. This is because this receiver topology uses positive feedback to increase the Q of the tuned circuit. If the feedback is too much it becomes an ...

You'll find voltage baluns in plenty of circuits. For example, the QRP Labs receiver module: HPSDR Pennywhistle (twice, T1 and T3): The Elecraft KX3: A voltage balun can do some things a current ...