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Questions tagged [audio]

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I want to hook up a couple active speakers to my icom 9100 so I have a good range and good volume . the output on the receiver is 8ohms

Can I just plug a 4 ohm powered speaker set into the output of the 9100's speaker output, or will that damage the Icom's amp?
KZ2K's user avatar
  • 1
0 votes
1 answer
89 views

How To Convert Morse Key Input To Audio

I am thinking of purchasing a TYT TH-9800 Plus. Its only drawback is there is no input for a CW device. What Equipment would be required to convert CW output into audio input?
octopusgrabbus's user avatar
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0 answers
70 views

Audio QAM Transceiver Problems GNU Radio

I'm learning radio techniques and am building transceivers for different modulation methods in GNU Radio. I am trying to develop a 16 QAM transceiver but I am having a huge amount of issues getting a ...
user25486's user avatar
0 votes
1 answer
833 views

I get no audio on my new Quansheng uv-5r plus despite green receive light

Quansheng uv-5r plus. First time on these devices, sorry. The receive light goes on but no receive audio. Transmit on ht works fine. Audio from device prompts are ok. Checked frequency traffic with ...
VicV's user avatar
  • 29
5 votes
1 answer
182 views

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 ...
hotpaw2's user avatar
  • 13.5k
1 vote
1 answer
519 views

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 ...
Aleksander Alekseev - R2AUK's user avatar
3 votes
1 answer
486 views

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 ...
Ariyan's user avatar
  • 143
3 votes
1 answer
890 views

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 ...
Engineer999's user avatar
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0 answers
146 views

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 ...
Alexander's user avatar
  • 321
2 votes
0 answers
363 views

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's user avatar
0 votes
1 answer
1k views

Writing "Wav" file in GNU Radio 3.9.0

I need to burn an audio file received from a computer sound card. But in the new version of the gnu radio, I found that the "Wav File Sink" and "Wav File Source" blocks were gone. ...
Антон's user avatar
1 vote
1 answer
315 views

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 ...
Aleksander Alekseev - R2AUK's user avatar
2 votes
1 answer
617 views

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 ...
hotpaw2's user avatar
  • 13.5k
0 votes
1 answer
68 views

Audio too high, how to troubleshoot

I am using a TYT TH-9800 with a 10 m half dipole antenna on low power (5 W) to connect to a WIN linked repeater (+5.0 MHz offset and 123.0 tone). I made contact with two other stations and was told ...
Floyd's user avatar
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1 vote
1 answer
583 views

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 ...
W2ASC's user avatar
  • 63
1 vote
2 answers
146 views

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 ...
Will Freeman's user avatar
2 votes
4 answers
792 views

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" ...
Mike Waters's user avatar
  • 8,071
3 votes
2 answers
3k views

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), ...
Jim's user avatar
  • 45
2 votes
1 answer
141 views

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? ...
Badger's user avatar
  • 21
6 votes
3 answers
748 views

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 ...
William's user avatar
  • 813
11 votes
4 answers
440 views

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 ...
Adam Davis's user avatar
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