Questions tagged [audio-interface]
Analog audio signals and connecting or designing related equipment: transceiver mic/speaker ports, headphones, microphones, TNCs, computer sound cards. Closely related signaling such as PTT. See also: [microphone]
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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?
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Is packet radio possible on Baofeng UV-5R and similar HTs?
I am curious to know if it is possible to do packet radio on VHF/UHF using the UV-5R... I have seen some invasive hardware hacks, but without modifying the radio itself (firmware, hardware) it's my ...
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Strange interference - consistent series of beeps/chrips at frequencies 145-146 KHz apart
I'm new at Ham Radio, in fact still studying for Technician (so I can't transmit) but I purchased a used Icom IC-746, dipole antenna kit and most recently a Hexbeam antenna. The power supply is an ...
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Cannot transmit with direwolf ("Audio output start error")
I'm trying to run direwolf (1.6.0) on Fedora 38. I'm using a C-Media USB audio device to interface with the radio:
...
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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), ...
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Looking for headset to use with BTech UV-25x2
I have a BTech UV-25x2 that I'm using as a portable base station. This radio has a "TRRS" connection (GND/SP/MIC/PTT) which I would like to get a headset for. I'm relatively new to ham radio, so don't ...
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My radio and audio output keep changing using WSJTX on FT8
TL;DR Laptop keeps switching between Signal Link audio output and speakers. Problem goes away when I turn TX knob down far enough on Signal Link.
I just bought a SignalLink and have it connected ...
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What is the external mic/speaker pinout for the Yaesu FT-4XR / FT-65R / FT-25R / SSM-16B?
These newer HTs seem to have a different pinout than the older Yaesu HTs. The older HTs used a single 3.5mm TRRS plug - these use a two-plug connector, with a 2.5mm jack and a 3.5mm jack, similar to ...
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Creating a low cost ear protection/ PTT setup for hunting
I have been trying to create a low cost communication setup for when I go hunting. Using this setup the hope is to be able to talk to one another while separated without having the audio up too loud. ...
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Signal in the center frequency of my SDR spectrum always
I'm pretty new to SDR, but I understand a little bit about RF.
On all 3 of my SDR device (two RTL one HackRF) The center frequency is always full of interference from something unknown.....it doesn't ...
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SSTV decoder for already-recorded files?
I have a full SSTV transmission pre-recorded. Is there any way that I could take the audio file and decode it?
Alternatively, is there a way to select the audio device (for example, to read an audio ...
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Receiving audio output from IC-9100 through USB port
Can someone please give me a clue here? I'm having problems receiving data from the IC 9100 radio.
I want to receive ax25 packets using FSK G3RUH modulation with an IC-9100 radio. It is configured ...
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Easy Digi hum with isolated ground
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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How to use HT microphone with two jacks (Kenwood connector) as a substitue for KX-3 microphone?
The original microphone for KX-3, Elecraft MH-3, is insanely expensive. What changes would be necessary to convert a cheaper speaker/microphone for a FM handheld transceiver? Is there any ready-to-buy ...
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Confusion about radio-computer interfaces: TNC, CAT, TRRS, Wolphi Link, ...?
This is probably a very simple and stupid question, but I'm getting more confused over time. Perhaps it is a matter of terminology, but a unified resource differentiating and explaining the different ...
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Iskra sst 2030 radio speaker plug
I was asked by a friend to take a look at an old 70-80s Iskra sst 2030 (ex Jugoslavian-slovenian company) radio. The radio seems to work fine but I can't understand which plug it uses for speakers. ...
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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 ...
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How much current can Baofeng UV-5R provide on +V pin?
I noticed that the pinout for cheap Baofeng connectors has +V available. I'm interested in powering some electronics directly from this connector.
When unloaded, this seems to have about 3.3V on it, ...
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How do I put an RJ-45 connector on to repair a Kenwood MC-59 microphone cable?
I've got a Kenwood MC-59 microphone, which started fraying around the place where the mic cable goes into the body. I thought I'd cut it off and put a new RJ-45 jack on it.
After cutting the cable, I ...
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Is PC to Digital Radio possible, is there an existing solution?
Is it possible to setup up an interface from a PC to a digital radio that is able to communicate with a Hytera PD702 handheld (450-520MHz) or like type radio? Or are there off the shelf radios that ...
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How do PTT buttons work?
I'm really new to this, and I was wondering how the whole PTT system works? I have a headset with microphone, and a Baofeng UV-82 radio. I know the radio has its own PTT button, but is there any kind ...
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Using an OPC-478 programming cable for CI-V
I have an [clone of] an Icom OPC-478 programming cable for my IC-208H. I thought I read that I can use that same cable to do CI-V with my IC-706 if I can find an 1/8" mono (male) to 1/8" stereo (...
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Is a connecting computer sound output equivalent to connecting a "dynamic" mic?
I bought a Kenwood audio breakout cable having only the kenwood connector (3.5mm and 2.5mm-in-one) on one end and up to me to add connectors on the other side.
It came with a nice diagram for how to ...
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How should I measure RFI on the headset cable from a hand-talkie?
I'd like to build an audio interface cable from my smartphone to my Yaesu FT-60 which incorporates VOX (since the Yaesu doesn't have VOX functionality) for APRS apps on the phone.
I'm having problems ...
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Mic ground vs ground
Why do most radios have a microphone ground as well as a Ground?
I have found that simply using one ground and tying the microphone as well as the PTT (and audio out, 5v out or whatever else is in ...
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Looking for documentation on Kenwood NX-700 AFO and DEO Signals
I'm studying the accessory connector (DB-25) from a Kenwood NX-700 radio. It seems that I might use the AFO and/or DEO signals, but I haven't been able to get proper documentation on such pins/signals....
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Ideas for a simple VOX circuit for packet?
I want to build a simple circuit, preferably only a few transistors which simply activates when it hears a low level audio, and deactivates when the audio signal does not exist anymore.
No pre-delay ...
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Using standard headphones with the Yaesu FT-60?
I just got a Yaesu FT-60R handheld, along with the MH-37A4B earpiece. After having it around for a couple days, I think I'd like to be able to connect standard headphones to it, so as to be able to ...
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Kenwood TM-241A direct discriminator out
I am going to do a simple SIMPLEX all-star node, using the URIx USB radio interface, which I just got. I have a Kenwood TM-241A transceiver.
I was told the speaker out jack is not sufficient:
The ...
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Where to pull audio for packet on an alinco DR-600
I have an old Alinco dual-band radio, the DR-600 (service manual) (manual)
I want to use this radio for receiving APRS packets. The speaker audio out Works but there are too many things to go wrong ...
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What is the expected microphone input voltage level of a handheld transceiver?
Ok, so I'm looking to inject some computer generated CW into a little handheld rig by wiring direct into the mic input line. What sort of voltage is expected on this input, are we talking uV, mV or ...
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How to hook up my computer's audio output to my CB Radio?
I own this simple CB Radio: http://www.cbforumas.lt/upload/manuals/alan/alan_42_um.pdf
I would like to connect its 2.5mm microphone jack and my computer's 3.5mm audio out jack. I have tried simple ...
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What issues can I expect when using Bluetooth for packet radio?
So I have an IC-2730, which doesn't have external inputs for packet radio, but it does have optional board for Bluetooth connectivity and there's also an optional Bluetooth headset for it. I'm trying ...