Amateur Radio Stack Exchange
Amateur Radio Stack Exchange

Questions tagged [audio]

17 questions
11
votes
4 answers

How do I increase my phone intelligibility?

Listening to various operators at different times, I've sometimes noticed, especially during contests, that some operators are easier to understand than others, and it doesn't all seem to be due to their speech patterns. The audio doesn't sound good…
Adam Davis
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6
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3 answers

Is there a special term for amateur transceiver speakers or anything that makes them different from any other kind of speaker?

When I bought a secondhand FT-7800R at Field Day 2017, I received an MLS-100 external speaker with it. I installed it recently and having the speaker more than an inch away from the radio's mounting surface is great. I'd like to buy more external…
William
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5
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1 answer

Hearing impairment and CW?

Do there currently exist profoundly deaf operators who operate CW? If so, how does one operate without being able to hear a sidetone? If licensed in the U.S. before 2006, how did they pass the Morse Code portion of the license exam?
hotpaw2
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3
votes
1 answer

Help on identifying signal type and extract audio from a signal

I Just recorded a signal using SDR++ and RTL-SDR. I can recognize even without any demodulation so I think it should be an AM modulation but AM demodulation doesn't give me a clear audio. I also tried NFM and got the same results (unclear audio) Can…
Ariyan
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3
votes
1 answer

Transmitted audio coming out through my speaker

I have a Kenwood TS590 HF transceiver. When I am transmitting and speaking into the microphone, I can hear my audio slightly coming out of my speaker connected to the radio (SP-23), or headphones if used instead. The audio is intelligible and isn't…
Engineer999
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3
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2 answers

What cable is needed in order to record audio from a Baofeng UV-5x3 on a computer?

I would like to be able to connect my radio to my computer in order to record audio. It seems like this would just be a matter of getting the right cable, but after trying a few cables (listed below), I'm realizing it's not that simple. I would like…
Jim
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2
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0 answers

Audio Interface wiring diagram of Yaesu FT-65 TNC cable

I want to imitate this cable, but I don't know-how. Yaesu FT-65 TNC cable. Is it need to series a resistor inside of those?
Jerome Lique
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2
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1 answer

What is an Audio Peaking Filter?

What is an Audio Peaking Filter? And how might that be different from an ordinary (narrow) CW bandpass filter, or from tunable audio filters (with fully configurable upper and lower cutoffs)? Does a peaking filter have anything in common with an…
hotpaw2
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2
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4 answers

Suitable acoustic foam rubber for headphones?

These are photos of the headphones that I use in my ham shack. As you can see, the dark gray foam rubber inside is deteriorating, and I need to replace it. It appears to be open-cell foam "rubber" between 1/8" and 3/16" thick. One of the headphones…
Mike Waters
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2
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1 answer

why does net control hear a check-in which I do not hear?

Sometimes on a net, net control acknowledges a check-in that I haven't heard. That is, I hear some check-ins but not others. Not poor signal, just silence. But net control hears it. Why might that be? [Me: new ham, Yaesu HT]
Badger
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What is a diode for in a JFET-based audio mute circuit?

I've build the following audio mute circuit: It works fine. However in many circuits I've seen people add an extra diode on the gate of Q1: For instance, see "QRP Classics" page 120 / page 159, or google for "JFET Audio Switch". I gave it a try…
Aleksander Alekseev - R2AUK
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1 answer

Looking for a convenient audio frequency spectrum analyzer

I would like to have a convenient tool to measure filters and amplifiers in 20 Hz - 20 kHz frequency range. Currently I'm doing this with a signal generator, an oscilloscope and LibreOffice. It's not the fastest and not the most convenient method,…
Aleksander Alekseev - R2AUK
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1
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1 answer

Design/Build a DIY Audio Attenuator and Splitter

I’m trying to be less of an appliance operator. To that end, I recently came up with a simple project that I thought I could figure out and build entirely on my own. I was wrong. My goal was to create a splitter with an attenuator that would allow…
W2ASC
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2 answers

Audio being sent over ground pin on audio jack

I just bought a QYT KT-8900D mobile radio. One of the first things I've noticed is that I cannot use my mixer to completely lower the volume of the radio's 3.5mm TRRS output. When the fader is all the way down, there's still a good amount of audio…
Will Freeman
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0 answers

Is 6 kHz bandpass filter wide enough for listening to SW broadcasts?

I'm considering buying ICOM IC-718 as a main rig and also to use it for SWL. Read contrasting opinions on the Internet, with an article reviewing dedicated SW receivers saying "That receiver's widest filter setting is 9 kHz, not so bad but kinda…
Alexander
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