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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]

4
votes
1answer
425 views

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 ...
0
votes
0answers
38 views

Are there audio cables for sale to connect e.g. a Baofeng UV-5R to a computer? [duplicate]

I'm referring to this connector with one 2.5mm and one 3.5mm socket. I found this on how to make one, but I would have thought they'd be for sale in a compact form at a decent price. (also the one I ...
2
votes
1answer
45 views

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 (...
3
votes
0answers
125 views

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 ...
3
votes
1answer
71 views

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 ...
1
vote
1answer
199 views

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 ...
3
votes
1answer
245 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), ...
2
votes
1answer
54 views

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 ...
2
votes
1answer
157 views

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....
4
votes
1answer
806 views

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 ...
1
vote
1answer
108 views

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 ...
6
votes
6answers
9k views

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 ...
3
votes
1answer
481 views

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 ...
2
votes
1answer
122 views

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 ...
3
votes
2answers
676 views

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 ...
4
votes
2answers
2k views

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 ...
6
votes
1answer
3k views

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 ...
3
votes
1answer
529 views

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 ...
8
votes
2answers
3k views

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 ...