Top new questions this week:
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The question is quite simple: When making a coax choke balun, does the size of the ferrite matter, and if so, why?
I have seen design notes that say to use a single FT240-43 toroid for powers up to ...
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I am creating an Echolink simplex link using a Raspberry Pi 3 B+, a Pluggable USB sound adapter, and an "Easy Digi" sound card interface which has 2 - 600ohm isolation transformers for audio in/out as ...
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I'm about to permanently move to another US state, which is in another callsign zone. Will I be forced to get a new callsign in the new zone?
Also, when I started, when one was traveling in another ...
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Question from new ham here, regarding ways of matching impedances between a feedline and an antenna.
Is it possible to fashion a broadband HF impedance matcher from a length of windowed twinlead, in ...
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Based on another question here, I think it is legal, but I would like it directly from the people who know. Thank you for your time.
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I'm having difficulties to understand how does this circuit work:
Apparently T1 is a regular 50 Ohm to 22.2 Ohm autotransformer. Turns ratio 2:3 gives a 0.66**2 impedance converation. Since the ...
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I have a Hytera PD785G. Typically, I charge it overnight, then take it out and use it.
Since this is currently my only radio station, I'd like to misuse it as a stationary device. Most of the time, ...
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Greatest hits from previous weeks:
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Will the propagation on the High Frequency bands come back up soon?? I am referring to the 3 to 30 MHz range.
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Free space path loss is calculated as:
$$ \left( 4 \pi df \over c \right)^2 $$
The presence of $f$ in this equation means that losses increase with increasing frequency, so there's an inherent ...
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I've been a ham for over 40 years, but never has there been such a prolonged period of such poor propagation. This has been especially the case over the past six months or so, and they continue to ...
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I would like to add a balun/choke to my dipole for the reasons outlined in Using a balun with a resonant dipole. In the spirit of continued kit and/or DIY building for my ham shack, I set out to ...
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I've just started studying for my HAM license a couple of weeks ago, so please excuse me if this is a remedial question...
I have the Canadian Amateur Radio Basic Qualification Study Guide (which I'm ...
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Other than rust, corrosion, and other reactions with air that would make the use of a metal unfavorable, how do different metals affect the performance?
Let's give Yagi an example:
Let's say I use 4 ...
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Let's say I have a repeater. Knowing all of the information about antenna height and gain in each direction, as well as power, how can I create a map similar to this map I saw of a repeater in ...
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