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11

Microphone technique has a good bit to do with clarity. Talk across the mic, not directly into it, unless it is a noise canceling type designed to be used that way. Speak no more than 2" away from the mic, even if it is a desk mic or a boom mounted type; many people make the mistake of thinking that just because they have a desk or boom mounted mic that ...


7

So, requirements: runs on OS X and windows easy to work with quicker than "tone and excel" method If you don't like writing software yourself, this should still be pretty doable with just your soundcard and a quick signal flow graph design (in GNU Radio Companion) of your own. So, first off: Exciting with a single tone and stepping through all ...


5

Eric Scace, K3NA wrote a two part article for the NCJ a few years back on all the adjustments you can make to your audio chain to improve it's quality. While the article focuses on audio quality for contesting, I think most of the points are relevant "regular" phone contacts. He has 6 main areas that he addresses: Operator training — Things like ...


5

Out of left field - If function is the only cause and fashion isn't an issue, use a couple of black cotton socks. On my headphones the plastic outer pieces are removeable. I cut the ends off two socks, slid them over the phones and my wife sewed them in place. Comfortable, although the seams do show a little. I don't care! Cost nothing and works fine!


4

Is there something that makes amateur radio speakers better or different than any other kind of unpowered speaker of equivalent wattage and impedance? Some may have audio filters, headphone jacks, or other such application-specific features. They could be somehow designed to be best at reproducing the frequencies important to intelligible speech, as ...


3

Audiophiles like to replace those plastic and foam earpads with a velour product such as this: If red doesn't suit you, there are other choices. There are several vendors for this type of product, with Brainwavz Audio as one example.


2

I built an audio interface that connected from an HF radio to my Mac, a few years ago. Obviously, I was concerned with ground loops and hum and suchlike, because I intended to use the interface to transmit too, so I used audio transformers as well. But the one thing I found that surprised me was that (as mentioned in comments by Kevin) the Mac has a ...


2

Congratulations on your new license! Since you referenced an HT, it would seem you are talking about VHF or UHF nets. VHF and UHF signals are generally line of sight communications. If your antenna is too low, a signal can be blocked by buildings, hills, etc. If the net control station (NCS) has better elevation or antenna height, the NCS will be able to ...


2

Audio isn't send just over the ground pin, or the other pin. It's sent over both. If both weren't necessary, then why not just make audio connectors with one pin and audio cables with one wire? The audio signal is represented by a voltage at the input. And the source of the signal manipulates that voltage by adding or removing electrons, what we usually ...


2

To directly answer your question, the exact-replacement material would be open-celled polyurethane foam with a density of about 2.0 lb/ft^3 (30 kg/m^3). This can be found at just about any foam outlet store. Alternatives: It does not have to be polyurethane but I have found polyurethane to be far more durable than other foams. The density can be ...


2

Hold the HT/mic farther from your mouth and speak in a normal voice. I made this mistake when I first started using an HT. You must not "close talk" the mic the way you might have done with a handheld mic in the "olde days."


1

A standard CW filter operates on the IF (RF after at least one stage of downmixing, but before demodulation). Elecraft's APF operates on the demodulated audio. The reason most filtering is done at IF is because making a nice sharp filter becomes easier the higher the filter's center frequency (within reason). In Elecraft's opinion, a filter with the more ...


1

Pulling some information from Electronics Stack Exchange, https://electronics.stackexchange.com/questions/38452/electronic-aspects-of-iphone-3-5mm-audio-output and https://electronics.stackexchange.com/questions/30841/how-do-i-build-a-trrs-headphone-jack-with-a-jack-that-is-detectable-by-an-iphone and Apple Stack Exchange, https://apple.stackexchange.com/...


1

More info: the mixer takes 2 stereo unbalanced 3.5mm inputs. maybe the extra ring on the radio's output jack is actually for stereo? Some weird behavior I experienced with the mixer: When both faders for radio and bluetooth audio receiver are at negative infinity, there is no sound coming out. However, when I fade up only the BT audio receiver's level while ...


1

There are already two answers posted with good information but here is a little bit more information to help with your selection process. Impedance Matching the impedance of the speaker to the speaker impedance range specified for the audio amplifier (the transceiver in your case) is important in order to ensure a maximum power transfer from your radio to ...


1

Our choice of speakers are important. They can make the difference between either hearing the other station clearly or straining to hear and missing part of the conversation. But we don't need "special" speakers, that may be expensive and not even be very good. The sound from the small tinny-sounding speaker in the top cover of that IC-765 under the ...


1

From this webpage: TL;DR: Get rid of the audio below 300-500 Hz*, and then use audio processing (compression) to raise the average power. *This is accomplished by: Choosing a suitable microphone, and Equalizing the audio (if possible) Details: Audio which is primarily the mid-range portion of the human voice (i.e. 300 to 2400 Hz.) carries better ...


1

I've found that precise enunciation works better for the former, whereas controlled modulation (consistent volume and slurring over twixt-word gaps) works better for the latter. Neither is is a function of the transmitter.


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